John Deere S110 Serial Number Lookup & PIN Location

John Deere S110 Serial Number Lookup, PIN Location, Parts & Year Guide

The John Deere S110 is a North American residential lawn tractor with a 42-inch Edge mower deck, a single-cylinder Briggs & Stratton gasoline engine, and a hydrostatic two-wheel-drive transaxle. Its Product Identification Number, commonly called the PIN or serial number, is the key reference for ordering the right machine parts, checking the correct production information and confirming the mower’s identity.

A model decal alone is not always enough when ordering parts. The complete John Deere S110 PIN can help a dealer or parts supplier identify the correct production range, while the separate engine serial number may be needed for engine-specific repair parts and service procedures. The mower-deck identification number is also important when ordering deck components, blades, belts or bagging equipment.

And See:

This guide covers the current-style John Deere S110 100 Series lawn tractor sold in the North American market with a 42-inch mower deck. Do not confuse it with the older John Deere 110 garden tractors, which are entirely different machines and use different identification, parts and attachment information.

In this guide

Main John Deere S110 PIN and serial-number plate location
Engine serial-number location and engine identification
PIN format and decoding limits
Year identification and dealer PIN lookup
Parts lookup and serial-number breaks
Maintenance and service-part differences
42-inch deck and attachment compatibility
Safety, recall, used-machine and missing-plate checks

Quick Guide: Where to Find the Serial Number on a John Deere S110

Identification number	Location on the John Deere S110	What it is used for
Main machine PIN / serial number	Left-hand side of the machine frame	Parts lookup, service information, ownership records and safety checks
Engine serial number	On the engine itself; confirm the exact label or stamped-area position for the installed engine	Engine-specific repair parts, service information and engine support
Transmission / drivetrain tag	Confirm through the applicable official parts information or dealer support if drivetrain-specific identification is needed	Drivetrain-specific parts where applicable
Attachment / deck tag	On the individual attachment or mower deck; location varies by attachment	Attachment identification, deck parts and fitment confirmation

On the John Deere S110, the main Product Identification Number (PIN) is located on the left-hand side of the machine frame.

If you are in a hurry:
Park the machine safely on level ground, stop the engine and remove the key.
Check the verified chassis, frame or operator-platform area for the identification plate.
Look for “PIN,” “Product Identification Number,” “Product ID” or “Serial Number.”
Use a torch and clean the surrounding dirt gently with a brush and cloth if needed.

Main Product Identification Number (PIN) Location on the John Deere S110

Exact position on the machine

The John Deere S110 machine PIN is located on the left-hand side of the frame. Left-hand and right-hand references are determined while sitting in the operator’s seat facing forward.

The S110 operator’s manual illustrates the identification-number location from the left side of the tractor. In practical terms, inspect the left frame area carefully with the mower parked safely, the engine stopped and the key removed. Dirt, grass residue, ageing, paint overspray or damage can make the identification information harder to read.

The complete PIN should be copied exactly before ordering parts, requesting service information or checking a used machine.

What the PIN plate looks like

The identification label carries the model and product-identification information for the mower. Read and record all visible letters and numbers, including leading zeroes.

Do not rely on a partial number, an engine number, a mower-deck number or an online listing description as a substitute for the complete machine PIN. These are separate identifiers and can lead to incorrect parts ordering.

Tips for old, dirty or painted machines

Use care when trying to reveal an identification label or plate:

Brush away loose grass, dust and dry dirt first.
Use a soft cloth and mild degreaser only where appropriate.
Use a torch or strong side lighting to make faded characters easier to read.
Photograph the identification area before and after cleaning.
Record every visible letter and number, including leading zeroes.
Compare the PIN with paperwork, service invoices and the seller’s description.
Do not use a grinder, wire wheel, aggressive abrasive or harsh scraping method.
Do not restamp, alter or make a replacement identification plate.

A missing, unreadable or suspicious PIN plate should be treated as an identity issue, not simply a cosmetic problem. Contact a John Deere dealer before buying, selling or ordering major parts. Where ownership, theft or registration may be relevant, contact the appropriate local authority.

Engine Serial Number on the John Deere S110

The engine serial number is separate from the John Deere S110 machine PIN. It identifies the engine rather than the complete lawn tractor, and it may be needed when ordering engine overhaul components, ignition parts, fuel-system parts, cooling components, electrical parts or engine-specific maintenance items.

Engine model used on the S110

Current published S110 specifications identify a Briggs & Stratton 33R877 single-cylinder gasoline engine, also identified in John Deere specifications as the 33R877 (M33). It is an overhead-valve, air-cooled engine with full-pressure lubrication and an oil filter.

The S110’s engine identification is important because replacement parts can depend on the complete engine model, type and code or serial information. Do not order engine-specific parts solely from the John Deere S110 model designation.

Engine serial-number location

The engine serial number is found directly on the engine. The precise location can vary by engine version and production range, so inspect the engine-mounted identification label or stamped identification area and confirm the details against the correct Briggs & Stratton documentation, official John Deere parts catalogue or dealer support.

On the S110, the engine is located beneath the hood ahead of the operator’s position. Shut off the engine, remove the key and allow hot components to cool before inspecting identification information.

Why the engine number matters

Use the engine model and serial information when ordering or diagnosing:

Engine overhaul parts
Carburettor or fuel-system components
Air-cleaner parts
Ignition components
Spark-plug-related parts
Engine electrical components
Oil-system parts
Cooling-shroud or engine-cover components

The machine PIN remains the primary identifier for chassis, steering, mower-deck, electrical-system and general tractor parts. The engine number is the primary identifier for engine-specific parts.

How to Read a John Deere S110 Serial Number

Copy the full PIN exactly as shown on the machine. Do not omit characters, replace unclear characters with guesses or assume that an engine number is the lawn tractor serial number.

A machine PIN may contain information used by John Deere systems to identify the individual machine, production range or configuration. However, individual character meanings should not be guessed unless confirmed for the exact S110 PIN through official documentation or a John Deere dealer.

PIN structure

John Deere’s publicly available owner information confirms that the S110 uses a Product Identification Number, but it does not provide a complete public character-by-character decoding guide for every S110 production version.

A dealer can use the complete PIN to identify the relevant production information and applicable parts catalogue data.

text

[MODEL CODE]-[PRODUCTION CODE]-[SEQUENCE NUMBER]

“Illustrative format only — this is not a real John Deere S110 serial number and should not be used to identify a machine.”

What the PIN can tell you

The complete John Deere S110 PIN can help with:

Identifying the individual lawn tractor
Selecting the correct parts-catalogue serial range
Helping a dealer identify production information or configuration details
Confirming that paperwork refers to the same machine
Checking machine-specific service information
Checking applicable safety campaigns or recall actions
Confirming whether a mower deck or accessory should be checked against a particular machine range

What the PIN cannot tell you on its own

A PIN is valuable, but it is not a full machine history report. It does not independently prove:

The exact calendar year of manufacture
The complete original equipment specification
The original supplying dealer
The full maintenance history
The current legal owner
Whether the engine, deck or transmission has been replaced
Whether the machine is stolen
Whether finance is outstanding
Whether every accessory shown with the mower was supplied new

Finding the Year of Your John Deere S110 from the Serial Number

Official public owner information for the John Deere S110 does not provide a universal serial-number-to-year chart that can safely be used for every production version. Generic online charts often mix models, markets and older John Deere product lines, so they should not be treated as proof of an S110’s production year.

The most reliable way to identify the production information for a particular S110 is a John Deere dealer PIN lookup using the full machine number.

How to confirm the production period

Copy the complete machine PIN exactly from the left-side frame identification area.
Check the operator’s manual, official parts catalogue or a verified model-specific serial-range reference where available.
Ask a John Deere dealer to search the complete PIN.
Compare the result with original sales records, warranty documents, labels, decals and configuration features.
Be cautious with generic online serial-year charts that do not clearly match the John Deere S110 and its North American market.

A dealer lookup is especially worthwhile when buying a used mower, ordering a major electrical or drivetrain component, or comparing two similar S110 machines with different parts listings.

Using Your John Deere S110 Serial Number to Order the Right Parts

The John Deere S110 model decal identifies the mower family, but the full PIN provides the stronger reference for accurate parts work. This matters when there are production changes, substituted components or different specifications within a model run.

The S110 is supplied with a 42-inch Edge mower deck, and deck-related items should be identified using both the mower PIN and the deck identification information where applicable.

Understanding serial breaks

A serial break is a point in production where John Deere changed a component, system or design. A parts catalogue may distinguish components using descriptions such as:

Serial number below
Serial number and above
Before PIN
After PIN
Early production
Late production
With a specified option
Without a specified option

A serial break can affect whether a replacement part fits, even if two machines both carry the S110 model designation.

Known serial breaks on the John Deere S110

John Deere’s publicly available S110 owner material does not provide a complete public serial-break table covering every machine component and production range. Owners should still read every serial-range note in the official parts catalogue, because differences can exist even when a public summary is unavailable.

Do not assume that a part listed by an aftermarket supplier fits every S110 simply because the product title says “John Deere S110.” Confirm the complete machine PIN, the old part number and the relevant parts-diagram notes before ordering.

Ordering parts correctly

Photograph and record the complete machine PIN.
Confirm the exact John Deere S110 designation on the machine identification information.
Identify the engine model and engine serial number for engine-related parts.
Use the official John Deere parts catalogue where possible.
Read every “before” and “after” serial-range note.
Compare the old part number and visible component with the diagram.
Ask a John Deere dealer or knowledgeable supplier to confirm uncertain parts before ordering.

For mower-deck work, identify the deck separately before ordering blades, belts, gauge wheels, bagging parts or mulching components.

Maintenance and Service Differences by Serial Range on the John Deere S110

Basic maintenance procedures may remain similar across S110 production runs, but service parts and instructions should always match the machine’s exact PIN range and engine identification.

For the published S110 with 42-inch deck, John Deere’s maintenance guide identifies service items including engine oil, an engine oil filter, air filter, fuel filter and spark plug. The same guide identifies the engine as marked 33R877-0104-G1 for its listed spark plug application.

The guide also identifies a 1.41 L (1.5 qt) engine-oil capacity for the listed S110 maintenance schedule. Confirm the correct procedure and fill level using the operator’s manual for the machine in front of you, particularly if an engine, oil-drain system or other component may have been changed.

Service items that require careful identification

Before ordering maintenance parts, confirm the PIN, engine information and old component where relevant:

Engine oil and oil filter
Air filter
Fuel filter
Spark plug
Drive belt
Mower-deck belt
Mower blades
Battery
Ignition switch
Headlight bulb
Deck gauge wheels

The S110 has a hydrostatic transaxle. John Deere identifies the transmission oil filter as not serviceable in published current specifications. Do not attempt to substitute a transmission filter or perform an unapproved transaxle service procedure without consulting the applicable operator’s manual, technical information or dealer.

Maintenance records matter

Keeping the PIN with service records makes future maintenance easier and can improve confidence for a legitimate used-equipment buyer. Record:

Machine PIN
Engine model and serial number
Mower-deck identification number
Purchase date
Hours at each service
Oil and filter changes
Blade and belt replacement dates
Repairs and replacement components
Safety-campaign or dealer-service documentation

Attachment Compatibility for the John Deere S110 by Serial Number

The John Deere S110 is a 42-inch-deck lawn tractor intended for residential property care. Its attachment suitability depends on the machine’s configuration, attachment mounting system, deck arrangement, tyre equipment, required ballast and the attachment’s own identification information.

John Deere lists the S110 as a 100 Series lawn tractor and describes use with a bagger, cart, snow blower and weather enclosure within the 100 Series accessory system. Published S110 maintenance information also identifies a 42-inch bagging kit and a 42-inch mulching kit for the 42-inch deck configuration.

Verified compatible attachment categories

Attachment type	Compatible attachment model or category	Serial-range or configuration notes	How to verify
Mower deck	42-inch Edge mower deck	Standard S110 mower-deck context; identify the individual deck before ordering deck parts	Confirm machine PIN and deck identification information
Bagging system	42-inch bagging kit	Confirm the machine has the correct 42-inch deck configuration	Check the machine PIN, deck identification and official fitment information
Mulching system	42-inch mulching kit	Confirm the specific 42-inch deck arrangement	Check the machine PIN, deck identification and official fitment information
Tow-behind equipment	Approved tow-behind accessories	Towing limits, terrain and attachment instructions apply	Confirm the attachment and towing guidance before use
Snow-removal equipment	Approved snow blower or blade accessory	Fitment can depend on mounting hardware, equipment range and required setup	Confirm machine PIN and attachment identification number with a dealer

Why the PIN matters for attachment fitment

Attachment compatibility may depend on more than the S110 model decal. Check:

Machine production range
Frame or mounting-bracket configuration
Deck-lift arrangement
Drive-belt or pulley arrangement
Attachment serial number
Required weights or ballast
Tyre chains or traction equipment
Electrical connections
Safety shields and operating instructions

Never assume an attachment from another John Deere model will fit an S110. Provide both the machine PIN and the attachment identification number to a John Deere dealer before purchasing used equipment or replacement mounting hardware.

Checking Recalls and Safety Notices Using Your John Deere S110 PIN

Safety campaigns, recalls and service actions can apply only to particular machine PIN ranges, components or configurations. A general internet search is not a substitute for checking the exact machine number.

Use this process:

Record the complete machine PIN.
Contact a John Deere dealer and request a check for open safety campaigns or recall actions.
Check official John Deere safety or recall information for the applicable market.
Keep a photograph and written record of the PIN with ownership and service records.
Retain any dealer paperwork showing completed safety work.

If you are buying a used S110, ask the seller whether any safety-related dealer work has been completed and request supporting paperwork where available.

Using the John Deere S110 Serial Number When Buying or Selling

A readable, consistent PIN is one of the most useful checks when buying or selling an S110. It does not guarantee condition or ownership, but it helps establish that the machine, paperwork and parts records refer to the same lawn tractor.

Checks for buyers

Check that the PIN plate and available paperwork match.
Confirm the machine is a John Deere S110 lawn tractor with a 42-inch deck configuration.
Check whether the engine, mower deck or attachment numbers are being confused with the machine PIN.
Look for damage, removal marks, unusual rivets, mismatched paint, altered characters or a replacement identification label.
Use the PIN to verify relevant parts ranges and attachment suitability.
Ask a dealer to check applicable safety campaigns.
Check the hour meter and compare its reading with the mower’s overall wear.
Inspect the 42-inch deck, blades, belt condition, gauge wheels and discharge components.
Test the hydrostatic drive, brakes, steering, PTO operation and safety interlock system.
Be cautious if the seller cannot explain missing or inconsistent identification information.
Pause the purchase if there is a serious identity discrepancy.

Advice for sellers

A legitimate seller can make an S110 easier to evaluate by providing:

A clear model description
Current hour-meter reading
Service records
Photographs of the mower and deck condition
Details of included bagging, mulching, towing or snow-removal equipment
Maintenance receipts
Confirmation that the PIN matches the sales paperwork

Avoid publishing a high-resolution image of the complete PIN plate in a public advert. Share the full number privately with a serious buyer, John Deere dealer, insurer or parts supplier where appropriate.

What If You Cannot Find or Read the Serial Number on Your John Deere S110?

Plate is dirty, painted over or faded

Use careful cleaning, bright lighting and photographs. Record every readable character without guessing at unclear ones. Compare visible information with original paperwork, service invoices and dealer records.

Plate is corroded or damaged

Record every character that remains readable and photograph the area. A John Deere dealer may be able to help interpret the available information when combined with model details, ownership documentation and other original machine records.

Plate is missing

Check for legitimate documentation, service records and other original identification information. Contact a John Deere dealer for guidance before ordering major parts, selling the mower or relying on an assumed identity.

Do not manufacture, restamp, alter or fit an unofficial replacement identification plate.

PIN does not match paperwork

A mismatch can result from:

Data-entry errors
Incorrect paperwork
A machine PIN being confused with an engine or attachment number
Replacement components
A more serious ownership issue

Resolve the discrepancy through a John Deere dealer and, where relevant, the appropriate authority before buying, selling, insuring or registering the machine.

John Deere S110 Serial Number FAQ

Where is the serial number on a John Deere S110?

The main John Deere S110 Product Identification Number is located on the left-hand side of the machine frame. Park safely, stop the engine, remove the key and inspect the left frame area with good lighting. The engine serial number is separate and is located on the engine itself.

What does the serial number on my John Deere S110 identify?

The machine PIN identifies the individual S110 lawn tractor. It helps a John Deere dealer or parts supplier select the correct parts information, identify the relevant production range and check machine-specific service or safety information. It is more useful than relying only on the S110 hood decal.

Is the John Deere S110 serial number the same as a VIN?

The S110 uses a Product Identification Number, or PIN, rather than a road-vehicle VIN in the usual automotive sense. Owners and sellers may casually call it a serial number, but it is the main machine identifier used for John Deere parts, service and ownership records.

Is the Product Identification Number, or PIN, the same as the serial number?

In everyday parts and service use, the terms PIN and serial number are often used for the main machine identification number. On the S110, the important point is to provide the complete Product Identification Number from the machine frame, not the engine number or mower-deck number.

Can I find the year of my John Deere S110 from the serial number?

A complete PIN can help a John Deere dealer identify production information, but a universal public S110 serial-number year chart should not be assumed. Use the complete PIN with a dealer lookup and compare the result with original documents, labels and machine configuration details.

Are official serial-number year charts available for the John Deere S110?

John Deere’s publicly available owner information does not provide a complete public serial-number year chart for every S110 production version. The most reliable method is to ask a John Deere dealer to search the complete machine PIN.

How accurate are online John Deere S110 serial-number year charts?

Treat generic serial-year charts cautiously. Many charts combine different John Deere product lines, older machines, markets or unrelated model families. A chart that does not explicitly identify the North American John Deere S110 lawn tractor should not be used as proof of year or configuration.

What is the difference between the machine PIN and engine serial number?

The machine PIN identifies the complete S110 lawn tractor. The engine serial number identifies the Briggs & Stratton engine fitted to it. Use the machine PIN for chassis, mower and general tractor parts; use the engine identification for engine-specific repairs and maintenance components.

Where is the engine serial number on a John Deere S110?

The engine serial number is on the engine itself. Its precise position can vary by engine version and production range, so inspect the engine-mounted identification label or stamped area after allowing the engine to cool. Confirm unclear information through the correct engine documentation, parts catalogue or dealer.

Do I need the engine number or the machine PIN to order parts?

For most mower, chassis, deck, steering and general S110 parts, start with the machine PIN. For engine filters, ignition components, fuel-system parts and internal engine work, provide both the machine PIN and the complete engine identification information whenever possible.

Why does the parts catalogue ask for a serial-number range?

A serial-number range helps distinguish early and late production changes. A part may have changed during production even though the mower model name stayed the same. Always read notes such as “serial number below,” “serial number and above,” “before PIN” and “after PIN.”

What is a serial break on a John Deere S110?

A serial break is a production point where John Deere changed a component, system or design. The affected part may have a different number, fitment requirement or installation procedure before and after that point. Use the complete machine PIN rather than guessing from appearance.

Which John Deere S110 parts are most likely to change by serial range?

Potential serial-range differences can affect electrical items, belts, switches, deck components, steering parts, engine-related components and hardware. The official parts catalogue is the correct place to check, because it can include notes not visible in a general maintenance guide.

Does maintenance differ by serial number on a John Deere S110?

Basic maintenance may be similar, but filters, belts, engine components or procedures can differ by production range or engine version. Use the operator’s manual and official parts information that match the exact PIN, and confirm engine-specific service parts from the engine identification.

Can filters change by serial number or engine version?

Yes. Engine filters and related maintenance components can depend on the exact engine specification and production information. Confirm the machine PIN, engine model and engine serial number before ordering filters from an aftermarket listing or when replacing unfamiliar parts.

How do I use a John Deere parts catalogue with my S110 PIN?

Start by identifying the S110 and entering or supplying the complete machine PIN where the catalogue or dealer requests it. Select the correct assembly, read all serial-range notes, compare the diagram with the machine and verify the old part number before ordering.

Can a John Deere dealer identify build details from the PIN?

A John Deere dealer can use the complete PIN to access relevant machine information through dealer systems. The available details can help identify the production range, applicable parts information and possible safety actions. Ask the dealer what information is available for your particular mower.

Can I check recalls or safety notices using my John Deere S110 PIN?

Yes. Contact a John Deere dealer with the complete machine PIN and ask for a check of open safety campaigns, recalls or applicable actions. These matters can be limited to certain PIN ranges or configurations, so a model-only search is not enough.

Avoid publishing a clear, full-resolution image of the complete PIN plate in a public advert or social-media post. A serious buyer, dealer, insurer or parts supplier may reasonably need the number, but it is better shared privately when there is a legitimate reason.

What should I do if the serial plate is missing?

Do not create, restamp or alter an identification plate. Gather ownership records, original sales documents, service invoices and photographs, then contact a John Deere dealer for guidance. If theft, ownership or registration is a concern, contact the appropriate local authority.

How can I tell whether a serial plate has been tampered with?

Look for unusual rivets, misaligned labels, fresh paint around the identification area, scraped surfaces, altered characters or paperwork that does not match the machine. None of these signs proves wrongdoing on its own, but a serious inconsistency should be resolved before purchase or sale.

Can I legally replace a damaged identification plate?

Do not assume that a replacement plate is permitted or appropriate. Contact a John Deere dealer for guidance on legitimate identification options. Never make, alter, stamp or attach an unofficial plate, particularly where ownership, theft prevention or registration rules may apply.

Why does the serial number not match my paperwork?

Possible explanations include a typing error, paperwork for a different machine, confusion between the machine PIN and engine number, or a more serious ownership issue. Compare every character carefully and ask a John Deere dealer to help resolve the discrepancy before completing a transaction.

Do attachments for a John Deere S110 depend on serial number?

They can. Attachment fitment may depend on the machine production range, deck configuration, mounting hardware, drive arrangement, safety equipment and the attachment’s own identification information. Confirm both the S110 PIN and attachment number before buying used accessories.

Which decks, baggers or mulching kits fit a John Deere S110?

The S110 is published with a 42-inch Edge mower deck and has 42-inch bagging and mulching kit applications in John Deere S110 maintenance information. Confirm the exact deck identification and machine PIN before ordering a deck, bagger, mulching component or belt.

Will an attachment from another John Deere model fit my S110?

Do not assume so. Similar-looking 100 Series attachments can have different mounting hardware, belts, lift arrangements or setup requirements. Confirm fitment using the complete S110 PIN and the attachment identification number through a John Deere dealer or official attachment information.

Can I decode every character in my John Deere S110 serial number?

Do not rely on an unofficial character-by-character decoder. Some PIN information may be used internally by John Deere systems, and public decoding rules may not apply across all production versions. A dealer can interpret the complete PIN for the correct machine range.

Does the serial number show where my John Deere S110 was built?

Do not assume that an individual PIN character publicly confirms factory or country of manufacture for every S110. Ask a John Deere dealer to check the complete PIN if production-location information is important for your records or a purchase decision.

How should I record and store my John Deere S110 PIN?

Photograph the identification area clearly, write the PIN exactly as shown and store it with purchase records, insurance documents and service receipts. Also record the engine serial number and mower-deck identification information separately. Keep a backup copy away from the machine.

Can I still get parts for an early John Deere S110?

Parts availability changes over time and can vary by component. Start with the complete machine PIN, engine information and the official parts catalogue. A John Deere dealer can help identify available original parts, updated replacements or current service alternatives.

How can I identify my machine if the John Deere S110 decals are missing?

Start with the main frame PIN, then compare the machine’s configuration with official S110 information. The S110 is a residential lawn tractor with a 42-inch Edge mower deck, hydrostatic two-wheel-drive transaxle and Briggs & Stratton 33R877 engine specification. Confirm the identity through a dealer PIN lookup before ordering parts.

Does the serial number affect resale value?

The PIN does not directly set resale value, but a readable, consistent PIN can increase buyer confidence. It supports correct machine identification, parts verification and safety checks. Missing or inconsistent identification information can reduce buyer confidence and delay a sale.

Do not assume that a public bulletin list covers every S110. Ask a John Deere dealer to check the complete machine PIN for applicable service information, safety campaigns or product updates. This is especially important before buying a used mower or ordering major replacement parts.

Who should I contact if I am still unsure about my John Deere S110 serial number?

Contact an authorized John Deere dealer with clear photographs of the left-side frame identification area, the engine identification information, the mower-deck tag and any relevant paperwork. A dealer can help confirm the machine identity and direct you to the correct parts and service information.