Official McCulloch hedge trimmer parts

Most common McCulloch hedge trimmer parts that need replacing

1. Spark plug. The engine's spark plug ignites the fuel mixture inside the cylinder to drive the piston.
2. Carburetor rebuild kit. Use a carburetor rebuild kit to replace seals, gaskets and other components in the carburetor when the engine runs rough or won't start.
3. Air filter. The air filter traps dust and debris from air entering the carburetor.
4. Cutting blades. Replace the hedge trimmer cutting blades if they're dull or damaged.

What to do when your McCulloch hedge trimmer won't start

The engine needs gas, compression and spark in order to start. First, make sure there's fresh gas in the tank-old gas accumulates water and burns poorly. Replace the fuel if it's old. Add fuel stabilizer to the gas when you refill the tank to help keep the fuel fresh.

If the fuel is fresh, check the fuel lines for cracks. Air enters the carburetor instead of fuel when the fuel lines have cracks. Replace the fuel lines if you find cracks in the lines. If the fuel lines are okay, you may need to rebuild or replace the carburetor because a dirty carburetor won't supply the engine with fuel.

Next, disconnect the spark plug wire and remove the spark plug. If you see deposits or corrosion on the electrodes, replace the spark plug.

Finally, to check for compression, remove the spark plug, press your thumb over the opening and pull the starter cord. If you don't feel air pushing from the cylinder, it's likely that the piston rings need to be replaced (for an accurate compression reading, use a compression gauge).