Owner’s manual
Can I use .095 trimmer line?
Yes. For Craftsman model 316794471, the specifications list a 0.095 in. (2.41 mm) trimming line diameter, so .095 line is the correct size to use. For safe operation and proper line feed, match the line type and length described in the owner's manual.
- Use 0.095 in. nylon trimmer line (round or similar standard line)
- Use the correct line length when winding; overly long line can prevent proper release
- Keep the cutting head shield installed and do not extend line past the shield length
- Never use metal-reinforced line, wire, chain, or rope
- Do not replace the cutting head with rigid or metal blades
| Item | Recommended for 316794471 | What happens if incorrect |
|---|---|---|
| Line diameter | 0.095 in. | Poor feed, overheating, reduced cutting performance |
| Line type | Standard nylon trimmer line | Breakage risk or unsafe projectiles with non-nylon materials |
| Line length on spool | Per manual guidance | Line may not advance properly if too long |
Using the specified diameter helps the bump head feed smoothly and keeps engine load where it should be. Oversize or incorrect line can make the trimmer run hot, cut poorly, and wear the spool components faster.
- Follow the manual steps for removing the inner reel and winding new line in the owner's manual
- If the line will not advance, inspect the spool for worn indexing teeth, burrs, or binding
- If the trimmer runs rough after a line change, a basic tune-up often helps; see how to tune up a grass line trimmer video
- For replacement parts and diagrams for model 316794471, shop the parts list on this page or search by model at Sears PartsDirect
Last updated: February 2026
What type of oil and gas for Craftsman 2 cycle 25cc 17 trimmer?
For the Craftsman 316794471 25cc 2-cycle gas line trimmer, we use fresh unleaded gasoline mixed with 2-cycle oil at a 40:1 ratio. That equals 3.2 fl. oz. of 2-cycle oil per 1 U.S. gallon of gas; mix in a separate fuel can, not in the tank (see the owner's manual).
- Use fresh fuel less than 30 days old.
- Use unleaded gasoline (do not use E85).
- Use 2-cycle oil for air-cooled engines.
- Mix in a separate approved fuel container, then shake to blend.
- Agitate the mix before every refuel.
| Gasoline amount | 2-cycle oil amount | Ratio |
|---|---|---|
| 1 U.S. gallon (3.8 L) | 3.2 fl. oz. (95 ml) | 40:1 |
| 1 liter | 25 ml | 40:1 |
Alcohol-blended fuels can absorb water, and even small amounts of water can cause fuel and oil to separate during storage. To reduce rough running and hard-start issues:
- Use a fuel stabilizer (such as STA-BIL or equivalent) mixed in the fuel can
- Never pour additives directly into the trimmer’s fuel tank
- Store only small amounts of mixed fuel so it gets used quickly
A correct 40:1 mix lubricates the 2-cycle engine properly. Too little oil can score the cylinder and piston; too much oil can foul the spark plug, smoke heavily, and make the trimmer run rough.
If the trimmer is hard to start, runs rough, or leaks fuel, these model-compatible parts are often involved:
- Fuel tank assembly (part number 753-06921)
- Mtd line trimmer carburetor (part number 753-06190)
- Mtd line trimmer air filter (part number 753-06417)
You can order replacement parts for Craftsman 316794471 from the parts list for this model, or search by model number on Sears PartsDirect.
Last updated: February 2026
How to replace line on Craftsman gas trimmer?
To replace trimming line on your Craftsman gas line trimmer model 316794471, shut the engine off, remove the bump knob, lift out the inner reel and spring, wind new line tightly in the direction shown on the reel, then reinstall the reel and bump knob. Use the 316794471 owner's manual for the exact bump-head steps.
- Turn the engine off and let the muffler and cutting head cool
- Disconnect the spark plug boot to prevent accidental starting
- Wear gloves and eye protection
- Clean grass and dirt from the cutting head
- Use only the line type listed for this trimmer (never metal-reinforced line)
- Hold the outer spool
- Unscrew the bump knob counterclockwise
- Pull out the inner reel; remove the spring
- Clean the reel, spring, shaft, and inside of the outer spool
- Wind tightly in the direction indicated on the bottom of the inner reel
- Leave about 6 inches (150 mm) of line at the end
- Lock the ends into the holding slots so the line does not unwind
| Loading style | What you cut | How it starts |
|---|---|---|
| Folded line | One length folded in half | Insert the loop into the split-wall slot |
| Split line | One 6 ft (1.8 m) length; split ends about 6 in (150 mm) | Feed one line into the top hole and one into the bottom hole |
- Reinstall the spring
- Seat the inner reel in the outer spool
- Tighten the bump knob
Correct winding direction and the right amount of free line keep the head feeding smoothly and help prevent overheating or stalling.
Replacement parts for this trimmer are available from the parts list for model 316794471, or you can search by model on Sears PartsDirect.
Last updated: February 2026
