My STIHL 041 Won't Start

Most starting problems are related to fuel and ignition issues.

Operating problems on the Stihl 041 vary widely in complexity and in their symptoms. It is helpful to classify these problems into three separate engine functions--spark, compression and fuel-related problems. But most "it won't start problems," according to M & D's article on small engine repair, are caused by fuel and spark related issues. Isolating the problem before making any repairs can solve these issues. Performing regular maintenance will lengthen the time in between breakdowns.

Things You'll Need

• Toothbrush
• Regular unleaded gasoline
• Rag
• Two-cycle engine oil
• Approved fuel container
• Socket wrench
• Leather work gloves

Instructions

Air Filter and Muffler

1. Unscrew the black knob that holds the air cover in place over the filter and the carburetor. Unscrew the air filter from its mounting plate. Remove the air filter and clean it with the toothbrush and a little gas.

2. Slap it against your palm to remove any excess fuel before reinstalling it. Wipe down the area around the air filter and choke cover plate with the rag. Replace the air filter if it's old or really dirty.

3. Unscrew the cover on the muffler--which will be in the front of the engine--using the screwdriver. Remove the spark arrestor screen, if present in your chainsaw. Clean inside the muffler and around the exhaust port, and the spark arrestor screen with the brush and rag.

4. Replace the screen if it's clogged with black carbon deposits. Replace the muffler if it has blockages, cracks or obstructions.

Check for Fuel

1. Dump out any old gas still in the tank. Never use old or bad gas. Clean the tank with the rag and toothbrush. Check the gas cap to make sure the vent hole is clean and unobstructed.

2. Disconnect the fuel line from the carburetor. Remove it from the engine and replace the fuel line if it is old or had gas left in it for more than a week. Replace the fuel filter if you are replacing the fuel line.

3. Pour the fresh gasoline oil into the approved fuel container. According to the operator's manual "use mid-grade unleaded gasoline with a minimum octane rating of 89 (R+M/2)." Mix the two-cycle engine in with the fuel at a ratio of 50:1 gas to oil. Close the container and shake it up to mix it. Fill the saw with fresh gas.

4. Push the ignition switch to the "On" position. Set the choke to completely open. Pull the starter rope until the engine turns over. Set the choke to the half-open position and pull the starter rope. The engine should fire up and run.

5. Check to make sure fuel is reaching the carburetor if the engine still doesn't start. If fuel is reaching the carburetor, you will need to remove, disassemble and service your carburetor.

Check for Spark

1. Disconnect the rubber boot from the spark plug if gas is reaching your carburetor, but there isn't any spark. Unscrew the spark plug with the socket wrench and remove it from the engine. Replace it with a new spark plug.

2. Put the new spark plug into the rubber boot and, using leather work gloves, hold it next to a metal spot on the engine block. Pull the starter cord and look for a blue spark across the spark plug and metal.

3. Check the spark plug wire for any loose connections. Check to make sure the electrical lines running to the ignition switch aren't touching any metal on the engine.

Tips & Warnings

• If problems still persist take your saw to a professional mechanic who is qualified to work with these saws.

References

• M & D Mower: Small Engine Repair Free Help
• The Garden Grapevine: Chainsaw Repairs
• K & T Parts House: Stihl Chainsaw Parts & Service Manuals