How to Fix a Chainsaw

There will be times when that old tree leans precariously towards your home or you need to remove a wood object that is an obstruction or nuisance. You may heat with wood during the winter and need to cut fire wood. If you own a chainsaw, you can deal effectively with all of the above. However, for your chainsaw to perform efficiently, it must be maintained regularly. What would you do if it malfunctions and needs to be fixed? Here are some useful steps on how to fix your two-stroke, internal combustion engine chainsaw, without outside help.

Things You'll Need

• Tachometer Micrometer Caliper Set of screwdrivers Carburetor cleaner spray Can of gasoline Chain oil

Instructions

1. Check the main power switch. In the event that your engine refuses to start, chances are you may have a defective on-off switch. Turn off the power and then check the switch thoroughly. If you find that the switch is defective, it will need to be replaced. If the switch is working, the mixture of fuel may be incorrect. In this case, refer to your owner's manual to ensure the correct fuel mixture. To do so, empty the fuel tank and start afresh with the correct fuel mixture.

2. Adjust the choke or carburetor. In case your chainsaw stalls when the engine is idling, ensure that the choke is set properly. To do so, first try releasing it to adjust it, and then move the plate and tighten all screws once again. To loosen any grit, spray carburetor cleaner spray on the choke's shaft. The carburetor may also need to be adjusted; consult your owner's manual which will guide you on resetting the idle mix screw.

3. Inspect the clutch and brake. In case your chainsaw stops when cutting, chances are the clutch may be slipping. If this is the problem, you will most likely have to have it repaired by a professional. Also, check to see whether the brake is engaged while cutting. If it is, the brake may simply need to be released.

4. Look closely at the chain cutters. If your chain cuts at an unusual angle, take a closer look at the cutters on the chain, as they are likely to be worn out, blunt or broken. In this case, try sharpening the cutters.
   While doing so, also take a look at the guide bar to see whether it is bent, or for signs of wear and tear.

5. Examine the fuel, spark plug, air filter, muffler and vents. In case your chainsaw runs, loses power while running, or stalls suddenly, the fuel in the gas tank may possibly be old, or improperly mixed. In this case, refill the gas tank with fresh fuel, making sure you have the correct fuel mixture. Also check the spark plug. Clean it thoroughly, or replace it if necessary. To ensure the spark plug gap is 0.25 inch, use a micrometer. Alternatively, the air filter may be dirty, or the muffler and vents may be blocked. All this may cause the engine to overheat. Clean all these areas thoroughly and then restart the engine.

6. Recheck the "idle" setting and clutch. In case the chain continues to turn when the engine idles, it is possible that the clutch may be damaged or worn out. If it is, have it repaired or replaced, as the case may be.
   Use a tachometer to gauge engine speed. Check the idle speed setting, as it may be set too high. In this case, lower the setting slightly, and then restart the engine.

Tips & Warnings

• Wear safety gloves and protective eye wear when working with power tools and equipment.