Concrete Saw: Hard to Start
If your concrete saw is hard to start, check the following parts: air filter, starter, filter, carburetor, muffler, spark plug, and gasket. Also, ensure you are using fresh fuel and that it is mixed to the proper ratio with your oil for your two-stroke engine. Fuel after 90 days, from leaving the pump, will start to go bad. Bad fuel can cause a hard start situation. If you suspect the fuel has gone bad, replace with fresh fuel. Once you have the problem part narrowed down, use our repair tips to fix your concrete saw yourself. Refer to your owner's manual for details relating to your model.
To determine if the muffler is the root of the problem, start by removing the recoil and then the belt cover on the blade side. Loosen the tension on the belt by turning the adjusting bolt counter clockwise until it stops. Disconnect the water line and the bracket by removing the bolt underneath. Walk the belt off the saw blade pulley.
Now, you can remove the blade assembly. Take out the muffler and try to start the engine. If the engine starts, and runs fine, then replace the muffler, or try cleaning it out with carburetor cleaner....
To determine if the muffler is the root of the problem, start by removing the recoil and then the belt cover on the blade side. Loosen the tension on the belt by turning the adjusting bolt counter clockwise until it stops. Disconnect the water line and the bracket by removing the bolt underneath. Walk the belt off the saw blade pulley.
Now, you can remove the blade assembly. Take out the muffler and try to start the engine. If the engine starts, and runs fine, then replace the muffler, or try cleaning it out with carburetor cleaner. Dry it thoroughly with compressed air. If any rust comes out of the muffler, or it makes a noise when shaking, the muffler needs to be replaced. Inspect the muffler for cracks – it will need to replaced if there are.
Install the new muffler. Reassemble the water line and then the blade assembly. Reattach the belt around the blade pulley by walking it back on the pulley. Reapply the tension by turning the adjusting nut clockwise until it stops. Put the belt cover back as well as the recoil.
Readjust your carburetor settings to prevent the engine from running rich, plugging the muffler, causing the same problem to occur. See “carburetor” on how to adjust these settings. Check your carburetor settings and lean out the mixture to prevent this problem from repeatedly happening.