Owner’s manual
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How much does it cost to replace a riding lawn mower engine?
For a Craftsman riding tractor like model 917203840, a full engine replacement typically costs about $800 to $2,500 installed (engine plus labor). The biggest cost drivers are the exact engine type, whether the replacement is a direct-fit, and the shop labor time.
What makes the price go up or down
- Engine type and horsepower: single-cylinder engines cost less than V-twins.
- Direct-fit vs. modified install: wiring, exhaust, throttle/choke linkages, and mounting can add time.
- Labor time: most riding mower engine swaps commonly run 4 to 8 hours depending on access and setup.
- Extra parts discovered during the job: belts, pulleys, battery cables, fuel lines, and hardware.
- Condition of the tractor: rusted fasteners and worn mounts increase labor.
Typical cost breakdown (installed)
| Cost item | Typical range | Notes |
|---|---|---|
| Replacement engine | $500 to $1,900 | Varies by brand, output, and availability |
| Labor | $300 to $900 | Often 4 to 8 hours at shop rates |
| Misc. parts and supplies | $25 to $200 | Fuel line, clamps, oil, filter, hardware |
Before you replace the engine, confirm it is really the problem
Many “bad engine” symptoms are caused by starting, fuel, or safety-interlock issues. We recommend checking the basics first using the 917203840 owner's manual.
- Battery condition and cable connections
- Starter/solenoid operation (a click with no crank is often electrical)
- Fuel flow and fuel filter direction (arrow toward carburetor)
- Air screen and cooling fins (overheating can mimic engine failure)
- Safety switches (seat switch, brake/clutch switch, blade engagement)
If the engine clicks but will not crank, use riding lawn mower engine clicks but doesnt turn over video to narrow it down before committing to an engine.
Why it matters
An engine replacement can cost more than other high-impact repairs (like a drive belt or deck service). A quick diagnosis first helps you avoid paying for an engine when the real issue is a starter circuit, fuel delivery, or an interlock switch.
Last updated: February 2026
What engine does Craftsman riding mower use?
The Craftsman lawn tractor model 917203840 is a 19.0 HP riding mower with a low-emission gasoline engine and electric start. The exact engine manufacturer and engine model are identified on the engine ID label; use the 917203840 owner's manual to locate it and record the numbers.
How to identify the exact engine (make and model)
Use the engine identification tag so we can match the correct spark plug, air filter, carburetor parts, and tune-up items.
- Park on level ground, set the parking brake, and let the engine cool
- Raise the hood and look for the engine ID label (commonly on the blower housing, valve cover, or near the starter)
- Write down every line on the label (model, type, and code if listed)
- Use the engine ID plus tractor model 917203840 when ordering engine parts
- If the label is missing, look for a stamped number on the shroud or a tag near the muffler
What we can confirm for model 917203840
The operator’s manual confirms the power rating and starting system; transmission type varies by tractor configuration, so use the manual and the shift pattern on your machine to identify it.
| Item to check | What you’ll see | Why it matters |
|---|---|---|
| Horsepower rating | 19.0 HP (gross power format) | Helps narrow engine families |
| Starting system | Electric start | Points to battery, solenoid, and safety interlocks |
| Drive control | Gear shift pattern or motion lever | Determines the correct drive belt and linkage parts |
If you are troubleshooting a no-crank or clicking start
A common starting-circuit part on this model is the lawn tractor starter solenoid 582042802.
- Verify battery terminals are clean and tight
- Confirm the brake/clutch is fully depressed and parking brake is set
- Check seat and blade-engagement safety switches are in the start position
- Inspect battery cables for corrosion or damage
Why it matters
Horsepower alone does not identify the engine. The engine ID (model-type-code) is what determines the correct maintenance parts and service specs for your Craftsman 917203840.
Last updated: February 2026
What model number is the Craftsman 917203840?
The model number for this Craftsman lawn tractor is 917.20384 (often written without the dot as 917203840). You can confirm it on the product identification label and in the 917203840 owner's manual.
Where to find the model number on the tractor
We recommend checking these common locations on Craftsman riding mowers and tractors:
- Under the seat on the frame or fender pan
- On the rear fender area near the seat
- Under the hood near the engine compartment
- On the left or right side of the frame rail
- In the operator paperwork that came with the tractor
How the number may be written (both are the same model)
The manual lists the model as 917.20384, while parts listings often show the same model without punctuation.
| Format you see | What it means |
|---|---|
| 917.20384 | Model number as printed in the operator’s manual |
| 917203840 | Same model number, formatted for parts lookup |
Why it matters
Using the exact model number ensures you get the right Craftsman parts and diagrams for your mower deck, drive system, and steering components. It also helps match wear items like belts and blades to the correct 46-inch deck configuration.
Quick parts examples for this model
If you are shopping by symptom or maintenance task, these are common part types you may see for model 917203840:
- Deck drive components such as the husqvarna lawn tractor blade drive belt 584453101
- Cutting components such as the husqvarna lawn tractor 46-in deck high-lift blade 532405380
- Ground drive components such as the lawn tractor drive belt 532125907
Last updated: February 2026
What year did Craftsman make the 917203840?
Craftsman model 917203840 (also shown as 917.20384 in the operator’s manual) was produced in the late 2000s to early 2010s era; the most reliable way to pin down the exact year is to match the tractor’s product ID/serial information to the identification label and the manual’s revision details in the 917203840 operator’s manual.
How to find the exact build year on your tractor
Use these checks on your Craftsman front-engine lawn tractor:
- Look under the seat or on the rear fender pan for the model and serial/product ID label.
- Write down the serial number exactly as shown (letters and numbers).
- Compare the model format: the manual lists Model No. 917.20384, which corresponds to 917203840.
- Check the manual footer for a manual part number and revision (helpful for narrowing the timeframe).
- If the label is missing or unreadable, use the engine’s model-type-code (on the engine shroud) as a secondary clue.
What we can confirm from the manual for 917203840
The operator’s manual identifies this tractor configuration:
| Item | What the manual shows |
|---|---|
| Brand | Craftsman |
| Model | 917.20384 (same family as 917203840) |
| Engine rating | 19.0 HP (gross power rating reference) |
| Deck size | 46-inch mower |
| Starting | Electric start |
| Drive type | Automatic transaxle |
Why the “year” is not a single fixed answer
Craftsman tractors are often sold across multiple seasons with the same model family, and the exact production run can vary by retailer batch and serial range. The ID label and manual revision together give the most accurate year match.
Related maintenance note (helps confirm you have the right model)
If your tractor has a 46-inch deck and you are servicing the cutting system, common wear items include the blade drive belt and blades. For this model’s deck drive system, see parts like the blade drive belt 584453101 and the 46-in deck high-lift blade 532405380.
Last updated: February 2026
