Craftsman 316798240 trimmer Parts

The model number for this Craftsman gas line trimmer is 316798240. Use 316798240 when you search for line trimmer parts, look up diagrams, or confirm fit for items like the trimmer head, fuel lines, air filter, or spark plug.

Most Craftsman trimmers list the model number on an ID label; check these common spots:

• On the shaft tube near the handle or throttle trigger
• Near the engine housing or recoil starter area
• On the debris shield area (near the cutting head)
• On a sticker or metal tag that also shows serial information

Craftsman trimmers often share similar names, but parts can vary by model and production run. Using 316798240 helps match the correct:

• Cutting head and spool components
• Fuel system parts (fuel lines, primer bulb, carburetor-related items)
• Ignition parts (spark plug, ignition module)
• Air intake parts (air filter, filter cover)

If you are comparing labels or trying to confirm you are reading the tag correctly, use our guide: how to find your appliance model number (and what it means for parts).

A single digit off can send you to the wrong parts list; confirming 316798240 first saves time and prevents ordering parts that do not fit.

Last updated: February 2026

If your Craftsman trimmer model 316798240 dies when you squeeze the throttle, the engine is usually running too rich or too lean under load. The most common causes are a dirty air filter, restricted fuel flow, or a carburetor that needs adjustment or cleaning.

• Clean or replace the air filter; a clogged filter chokes airflow and can make the engine bog and stall.
• Use fresh fuel mix (old fuel causes poor acceleration and stalling); empty the tank and refill with the correct mix.
• Check the fuel filter and fuel lines for blockage, cracking, or loose connections.
• Inspect the spark arrestor screen (muffler screen) for carbon buildup that restricts exhaust.
• Verify the primer bulb works and fuel returns to the tank; a cracked bulb can pull air instead of fuel.

When a trimmer idles but dies as soon as you “give it gas,” the carburetor often cannot deliver enough fuel during acceleration.

Running a 2-cycle Craftsman trimmer too lean can overheat the engine; running too rich can foul the spark plug and cause repeated stalling. Fixing airflow, fuel delivery, and exhaust restriction restores stable acceleration and protects the engine.

For safe troubleshooting habits and basic repair prep, we recommend reviewing are diy appliance repairs safe.

Last updated: February 2026

To replace the trimmer line on your Craftsman 316798240 gas line trimmer, we remove the spool, load the correct diameter line evenly (no overlaps), then reinstall the spool and test the bump feed. Even, non-overlapping wraps prevent tangles and feeding problems.

• Shut the engine off and let it cool completely
• Disconnect the spark plug wire to prevent accidental starting
• Wear gloves and eye protection (line ends can snap back)
• Clean grass and debris from the trimmer head so the spool seats correctly

1. Open the head: Press the side tabs or unscrew the bump knob (varies by head style).
2. Remove the spool: Lift it out and note how it sits in the housing.
3. Cut new line: Most heads use two equal lengths or one long length folded in half.
4. Anchor the line: Insert the line end(s) into the spool’s starter hole(s) or slot.
5. Wind evenly: Wrap in the direction of the arrow on the spool; keep wraps tight and do not overlap.
6. Set the tails: Leave equal lengths out; park them in the spool notches (if present).
7. Reassemble: Reinstall the spool and cover; pull the line ends to release them from notches.

• Line is too thick for the head (common cause of jamming)
• Spool is wound in the wrong direction
• Wraps are crossed or overlapped (causes tangles inside the head)
• Head is packed with debris, preventing the spool from turning freely
• Line ends are too short to grab and advance

A properly loaded spool keeps the bump-feed mechanism working, reduces vibration, and helps your Craftsman trimmer cut cleanly without constantly stopping to untangle or rethread line.

For more help identifying the exact model number format when ordering supplies, use how to find your appliance model number (and what it means for parts).

Last updated: February 2026

For the Craftsman 316798240 gas line trimmer, use a 40:1 fuel mix (40 parts fresh unleaded gasoline to 1 part 2-cycle oil). That ratio provides the lubrication a 2-cycle engine needs to start reliably, run cleanly, and avoid accelerated wear.

• Use fresh unleaded gasoline (stale fuel causes hard starting and poor idle).
• Use 2-cycle oil labeled for air-cooled 2-stroke engines.
• Measure oil first, then add gasoline in an approved fuel container.
• Cap and shake to blend; re-shake before refueling.
• Mix only what you will use within about 30 days.

• Heavy smoke and plug fouling: too much oil.
• Overheating, power loss, scoring risk: too little oil.
• Surging or hard starting: old fuel, water in fuel, or incorrect mix.

On a 2-cycle Craftsman trimmer, the oil in the fuel lubricates the crankshaft, piston, and cylinder. Keeping the 40:1 ratio consistent helps prevent carbon buildup, spark plug issues, and premature engine damage.

For help confirming you are using the correct model number when looking up specs and parts, use how to find your appliance model number (and what it means for parts).

Last updated: February 2026