Owner’s manual
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What engine does Craftsman riding mower use?
For Craftsman lawn tractor model 917270411, the owner’s manual identifies it as a 13.5 HP electric-start tractor with a 42-inch mower deck. For exact engine make and model (such as Briggs & Stratton model family), use the engine ID label on the engine and match it to the parts list in the 917270411 owner's manual.
We recommend using the engine’s identification tag because the same tractor model can be built with different engine variants over time.
- Lift the hood and locate the engine ID label (often on the blower housing or valve cover)
- Write down the engine model, type, and code numbers
- Use those numbers when ordering engine parts (carburetor, starter, air filter, spark plug)
- Compare the engine numbers to the engine section in the 917270411 owner's manual
- If the label is missing, use the tractor’s serial number and the illustrated parts breakdown to narrow it down
These specs are listed for the Craftsman 917270411 and are useful when you are cross-checking tune-up parts and operating settings.
| Item | Spec (917270411) |
|---|---|
| Horsepower | 13.5 HP |
| Starting | Electric start |
| Deck size | 42-inch |
| Fuel capacity | 1.25 gallons (unleaded regular) |
| Oil capacity | 3.0 pints |
| Spark plug | Champion J19LM or RJ19LM (0.030 in gap) |
The exact engine model determines the correct replacement parts and service settings. Using the engine ID numbers prevents ordering the wrong ignition parts, filters, or carburetor components, and it also helps when troubleshooting hard-start or no-start symptoms.
Last updated: January 2026
Who makes the Craftsman 420cc engine?
For the Craftsman 917270411 lawn tractor, the owner’s manual identifies the tractor as a 13.5 HP model but does not list a 420cc engine manufacturer. In practice, Craftsman-branded 420cc single-cylinder engines are commonly supplied by MTD for many Craftsman riding products; confirm the exact maker by matching the engine model and type on the engine ID label to the specifications in the 917270411 owner’s manual.
Use the engine’s identification label, not the hood decal or tractor model number.
- Locate the engine ID label (typically on the blower housing, valve cover area, or near the starter)
- Write down the engine model, type, and code/spec numbers
- Compare those numbers to the engine parts list or spec reference in your documentation
- If the label is missing or unreadable, check for stamped numbers on the engine shroud
- Use the tractor model number 917270411 only to find tractor parts; the engine maker is confirmed by the engine ID
| What you’re looking at | What it tells you | Why it matters |
|---|---|---|
| Engine model/type/code | The actual engine family and manufacturer | Ensures correct tune-up and repair parts |
| Displacement (cc) | Engine size (for example, 420cc) | Helps match carburetor, air filter, and ignition parts |
| Spec number | Build configuration | Prevents ordering the wrong gasket or starter |
The tractor model (Craftsman 917270411) tells us the chassis and mower deck configuration, but the engine ID tells us who built the engine and which ignition, carburetor, starter, and maintenance parts fit. That is the fastest way to avoid wrong-part returns.
Last updated: January 2026
How much does it cost to replace a riding lawn mower engine?
For a Craftsman riding lawn tractor like model 917270411, engine replacement typically runs about $600 to $2,500 total (engine plus labor). The biggest cost drivers are the exact engine spec, whether the wiring and pulleys swap over cleanly, and local shop labor rates; confirm the correct engine details in the 917270411 owner's manual.
Engine replacement cost is usually a mix of parts, labor, and “while you’re in there” items.
- New or remanufactured engine assembly
- Labor time (removal, transfer parts, installation, test run)
- Fluids and tune-up items (oil, filter, spark plug)
- Optional wear items (belts, pulleys) if they’re cracked or glazed
- Pickup/delivery or mobile service trip charges (if used)
| Scenario | What it usually includes | Typical total cost |
|---|---|---|
| Budget repair | Used/reman engine, minimal extras | $600 to $1,400 |
| Most common | New engine, basic tune-up items | $1,200 to $2,000 |
| High end | New engine plus multiple worn drive/deck parts | $1,800 to $2,500 |
If the old engine failed from heat, vibration, or belt issues, replacing worn drive components helps protect the new engine.
- Deck belt: lawn tractor drive belt 532144200
- Ground drive belt: v-belt 532138255
- Muffler (if corroded or leaking): muffler 532137348
A new engine is a major investment; if a belt is slipping or a pulley is binding, it can overload the replacement engine and shorten its life. We recommend checking belt condition, pulley alignment, and cooling fin cleanliness as part of the job.
Last updated: January 2026
