Craftsman 917255917 gt 18 twin-garden tractor Parts

Replacing the engine on your Craftsman tractor model 917255917 is worth it when the tractor’s chassis, mower deck, and drive system are still solid and you want more years of service; it is usually not worth it when the engine cost plus labor approaches about half the price of a comparable replacement tractor.

Quick decision checklist

• The mower deck is not cracked, badly rusted, or bent (no chronic vibration or scalping)
• The motion drive and blade drive systems work well (belts, pulleys, idlers are serviceable)
• You can do the swap yourself or have affordable labor available
• You want to keep existing attachments and setup (hitch, deck, tires)
• The engine failure is major (low compression, thrown rod) rather than a tune-up issue

Cost and effort: what to compare

Use this simple comparison to decide where your money goes farthest.

Option	Best when	Typical downside
Repair existing engine	Problem is fuel, spark, or maintenance related	Can become time-consuming if internal wear is severe
Replace engine	Tractor is in good overall condition	Higher up-front cost; may require pulley and wiring transfers
Replace tractor	Multiple systems are worn (engine + deck + drive)	Higher total spend; may need new attachments

Before you commit: rule out common “not an engine” problems

On riding tractors like the 917255917, symptoms that feel like “bad engine” are often maintenance or drive issues.

• Check engine oil level and change oil on schedule
• Inspect and clean the air intake screen and air filter
• Use fresh fuel; for storage over 30 days, prevent gum deposits in the fuel system
• If the tractor moves poorly, inspect the motion drive belt routing and condition
• If cutting performance is poor, check blade sharpness and deck cleanliness

Model-specific tip: the manual includes procedures for motion drive belt removal and replacement, plus storage guidance that helps prevent fuel-system damage; see the 917255917 owner’s manual.

Why it matters

A new engine can restore reliability, but it will not fix worn belts, idlers, or an out-of-adjustment deck. The manual’s maintenance schedule (oil, air cleaner, blade care, tire pressure) helps you protect the investment after an engine swap.

Last updated: January 2026

Craftsman model 917255917 is a GT 18 twin-garden tractor model number used to identify the tractor and its correct repair parts; the model number itself does not contain a build year. To find the year, we use the tractor’s product ID/serial label and confirm the date code format shown in the 917255917 owner's manual.

Where to find the build date information

On most Craftsman riding mowers and garden tractors, the build date is tied to the product ID/serial label, not the model number.

• Look under the seat pan or seat bracket area
• Check the frame near the rear fender or footrest
• Look near the engine compartment or dash tower
• Write down both the model number and the product ID/serial number exactly as shown

How to decode the year (what to look for)

Many Craftsman units use a date code on the label that can be read as month, day, year (MMDDYY). When you find a 6-digit date code, the last two digits are the year.

• Example: 072811 typically reads as July 28, 2011
• Example: 031205 typically reads as March 12, 2005
• If you see a longer code, use the label’s formatting and headings (often “DATE” or “MFG DATE”) to identify the date portion

What you have	What it tells us	What to do next
Model number (917255917)	Which parts diagrams and repair parts fit	Use it to match parts and manuals
Product ID/serial number	Production run details	Use it to determine the year
Date code (MMDDYY)	Exact build date	Convert last two digits to the year

Why it matters

The correct year helps when you are matching electrical parts, ground drive components, and mower deck hardware across production changes. Even when the model number matches, a mid-year change can affect items like an ignition switch, belts, or steering parts.

Parts tip for this model

If you are already ordering parts for Craftsman 917255917, use the model number to stay on the correct diagrams. For example, the manual’s electrical parts list includes an ignition switch, and a common replacement on this model is the lawn tractor ignition switch 532365402.

Last updated: January 2026

For Craftsman model 917255917, the owner’s manual describes it as a GT 18 HP twin-cylinder engine garden tractor. That means this riding mower uses an 18 HP, twin-cylinder gasoline engine designed for cool-running performance and strong pulling power.

How to confirm the exact engine on your tractor

Even within the same model family, the most reliable way to confirm the exact engine make and spec is to match what’s on your tractor to the documentation and ID labels.

• Check the engine shroud for the engine brand label (commonly Briggs & Stratton, Kohler, or similar)
• Locate the engine model/type/code stamped on the engine (often near the valve cover or blower housing)
• Record the tractor model and serial number from the model plate on the fender
• Compare those numbers to the specifications and parts listings in the 917255917 owner’s manual

What “18 HP twin-cylinder” means (and why it matters)

Twin-cylinder engines typically run smoother than single-cylinder engines and are well-suited for a garden tractor that may handle mowing plus attachments.

Why it matters: engine type affects tune-up parts (spark plugs, air filter, fuel filter), starting behavior, and troubleshooting steps.

Engine description (manual)	What you can expect	Common maintenance focus
18 HP twin-cylinder	Smoother operation, strong torque	Oil changes, air filter service, spark plug replacement

Related parts you may replace during engine-related service

If you are troubleshooting a no-start or intermittent power issue, these model-matched electrical parts are often involved.

• Ignition switch (key switch): lawn tractor ignition switch 532365402
• Battery cables and connections (clean/tighten)
• Fuse and wiring condition (inspect for damage)

Last updated: January 2026