Craftsman 917370730 lawn mower Parts

The model number for this Craftsman walk-behind gas lawn mower is 917.370730 (often written without the dot as 917370730). You’ll see it printed on the mower’s model label and on the cover of the owner's manual.

We recommend checking the mower’s model label first, then matching it to the manual.

• Look for a label or plate on the rear of the deck or near the handle mounting area
• Confirm the full number, including the dot: 917.370730
• Match the model number before ordering parts like a blade, drive control, or wheel
• If the label is dirty or faded, clean it gently and re-check the digits

Parts for walk-behind mowers can look similar across Craftsman models, but mounting holes, deck style (21-inch), and drive components can differ. Using the exact model number helps ensure the correct fit for items like the 21-inch blade, drive control assembly, and wheel/gear case.

These are examples of parts that commonly tie back to the model number when you’re identifying the correct replacement:

• Husqvarna lawn mower 21-in deck 3-in-1 blade 532189028
• Lawn mower drive control 583230601
• Lawn mower wheel and tire, 8 x 1.75-in 583719501

Last updated: February 2026

Most gas walk-behind mowers, including Craftsman model 917370730, are designed to run on regular unleaded gasoline with up to 10% ethanol (E10). Using fuel with more than 10% ethanol (such as E15 or E85) commonly causes hard starting, poor performance, and fuel-system damage.

Ethanol percentage is the amount of alcohol blended into gasoline.

• E0: 0% ethanol (no ethanol)
• E10: up to 10% ethanol (the typical maximum for small engines)
• E15: up to 15% ethanol (not recommended for most walk-behind mowers)
• E85: up to 85% ethanol (not for mower engines)

For model-specific fuel guidance and operating notes, we recommend checking the fuel section in the owner's manual.

Fuel issues show up as “won’t start,” surging, stalling, or loss of power. These steps prevent the most common problems:

• Use fresh gasoline; don’t keep fuel sitting for long periods.
• Keep the fuel can sealed to reduce moisture absorption.
• Avoid mixing old fuel with new fuel.
• If the mower has been stored with fuel and now runs poorly, drain the tank and refill with fresh gas.
• Store the mower only after the engine cools down, and avoid storing it where fumes could reach a flame or spark.

If your Craftsman 917370730 won’t start, fuel quality is one of the first checks.

Small-engine fuel systems (carburetor, fuel lines, seals) are sensitive to higher ethanol blends. Staying at E10 or less helps protect the fuel system, improves reliability, and reduces hard-start complaints.

If you’re stocking up on maintenance items for the season, we also recommend reviewing lawn mower parts and supplies to stock up on video. For ordering replacement parts by model number, use the parts list for Craftsman 917370730 or search on Sears PartsDirect.

Last updated: February 2026

For the Craftsman 917370730 gas walk-behind mower, use fresh, clean regular unleaded gasoline; most owners use E10 (up to 10% ethanol). Avoid old or contaminated fuel because it commonly causes hard starting and rough running. For model-specific fueling notes, use the owner's manual.

• Use regular unleaded gasoline from a busy station (fresh turnover).
• E10 is the most common pump fuel and works well in most walk-behind mower engines.
• Avoid using stale fuel (last season’s gas) in the tank or gas can.
• Avoid fuel contaminated with water, rust, or dirt.
• Premium/high-octane fuel is not required for normal mowing.

• Shut the engine off and let hot parts cool.
• Wipe dirt off around the fuel cap so debris does not fall into the tank.
• Fill carefully; do not overfill.
• If the mower has been stored, smell the fuel; sour or varnish odor means it is stale.

Stale or dirty gasoline is a top cause of “won’t start” symptoms. If you suspect bad fuel, drain the tank and refill with fresh gasoline.

Fresh fuel helps the carburetor and ignition system do their job. Old gas and contamination create starting problems and inconsistent power, especially after storage.

If you need replacement parts while troubleshooting (for example, a drive component or hardware), we list model-matched parts for 917370730 on this page, and you can also search by model at Sears PartsDirect.

Last updated: February 2026

Common problems on the Craftsman 917370730 gas walk-behind mower are no-start conditions (stale fuel, dirty air filter, bad spark plug, flooded engine), loss of power from grass buildup under the deck, and self-propelled drive issues when the rear drive wheels bind up with debris. For model-specific starting and troubleshooting steps, use the owner's manual.

• Won’t start: out of fuel, stale fuel, water in fuel, dirty air filter, spark plug wire off, bad spark plug, control bar not held to the handle
• Starts then dies or runs rough: fuel quality issues, dirty air filter, grass and chaff restricting airflow around the starter area
• Loss of power: cutting too much grass at once, mowing too fast, buildup under the mower deck
• Hard to push: grass too high, cutting height too low, grass catcher too full, handle height not set comfortably
• Self-propelled slows or won’t pull: debris packed in the rear drive wheel area, worn or misrouted drive components

• Hold the operator control bar firmly against the handle while starting.
• If you primed repeatedly in warm weather, the engine may be flooded; wait a few minutes and try again without priming.
• Replace stale fuel with fresh gasoline; water or dirt in fuel causes repeated starting problems.
• Clean or replace the air filter; a restricted filter is a top cause of no-start and power loss.
• Clean grass and debris from under the deck and around the top of the engine to restore airflow.
• For self-propelled issues, clean both rear drive wheel areas so the wheels turn freely.

Most “common problems” trace back to airflow, fuel quality, and drag from grass buildup. Fixing those basics first prevents repeat no-starts, improves cut quality, and reduces strain on the engine and drive system.

For replacement parts for Craftsman 917370730, order from the parts list for this model or search by model number on Sears PartsDirect.

Last updated: February 2026