Owner’s manual
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What model number is the Craftsman 107287900?
The model number for this Craftsman rear-engine riding mower is 107.28790 (often written without the dot as 107287900 on parts listings). You’ll use this model number when ordering parts and when looking up the correct diagrams in the 107287900 operator’s manual.
Where to find the model number on the mower
The identification tag is located under the seat. Tilt the seat forward to access the ID tag.
- Park on a level surface and set the parking brake
- Turn the key off and remove it
- Tilt the seat forward and locate the ID tag
- Record the model number and unit serial number for future parts orders
Why you may see two formats (with and without a dot)
Both formats refer to the same mower; the dot is a common Craftsman manual format.
| Where you’re looking | How it may appear | What to use for parts |
|---|---|---|
| Operator’s manual cover | 107.28790 | 107287900 |
| Parts listings and diagrams | 107287900 | 107287900 |
Why it matters
Using the exact model number helps us match the correct assemblies (like the 50-inch mower deck, belts, and wheel and tire group) so you get the right Craftsman parts the first time.
Last updated: January 2026
How to find Craftsman model number?
On the Craftsman rear-engine riding mower model 107287900, the model and identification tag is located on the underside of the seat. Tilt the seat forward to access the ID tag, then record the model number and other ID numbers for parts and service (see the 107287900 operator's manual).
Where to look on model 107287900
Check these spots in this order:
- Underside of the seat: tilt the seat forward and look for the identification tag
- Frame area near the seat mount: sometimes the tag is easiest to read from the side
- Engine label: record the engine code/serial too (helpful for engine-specific parts)
- Any decal or plate near the rear frame: some decals reference service information, but the ID tag is the key
What to write down (and why)
When we help match parts for your mower, having the full ID information prevents ordering the wrong spindle, belt, or electrical part.
| Item to record | Where it’s found | What it’s used for |
|---|---|---|
| Model name/number | ID tag under seat | Matching mower diagrams and parts lists |
| Unit serial number | ID tag under seat | Confirming production version |
| Manufacturer’s ID numbers | ID tag under seat | Verifying exact build |
| Engine model/type/spec and code/serial | Engine label | Matching Briggs and Stratton engine parts |
Why it matters
Craftsman riding mowers often have multiple versions that look similar but use different deck hardware, mandrel parts, or starting components. Using the exact model number from the ID tag helps us match the correct parts the first time.
Last updated: January 2026
How much does it cost to replace a riding lawn mower engine?
For a Craftsman rear-engine riding mower model 107287900, engine replacement cost is typically $260 to $1,800 installed, depending on the engine, labor rates, and any related repairs found during teardown. Plan on several hours of labor plus parts, fluids, and tune-up items. See the 107287900 owner’s manual for safety steps before any service.
What drives the total price
- Engine type and availability (OEM vs compatible replacement)
- Labor time (riding mowers take longer than walk-behind mowers)
- Extra parts discovered during removal (worn belts, mounts, wiring)
- Shop supplies (oil, filter, fuel line clamps, hardware)
- Pickup/delivery fees (if you do not transport the mower)
Typical cost breakdown (what you are paying for)
| Cost item | Typical range | Notes |
|---|---|---|
| Engine (part) | $200 to $1,400 | Varies by horsepower and brand/spec match |
| Labor | $200 to $600 | Often 4 to 8 hours for riding mowers |
| Fluids and tune-up items | $20 to $150 | Oil, filter, spark plug, fuel filter |
| Misc. hardware | $5 to $50 | Nuts, washers, clamps, fasteners |
Before you replace the engine, check these common “no-start” causes
The manual troubleshooting steps for this rider point to several quick checks that can prevent an unnecessary engine swap:
- Ground speed levers set to START/PARK
- Mower blade switch set to OFF
- Choke set correctly for a cold start
- Ignition switch turned fully to START
- Fuel level and fuel quality (avoid fuel with more than 10% ethanol)
Why it matters
An engine replacement is one of the highest-cost repairs on a riding mower. Confirming basic interlock and starting conditions first can save hundreds of dollars and get the mower running with a smaller repair.
Last updated: January 2026
