Husqvarna 1018855-26, 965030298, 965030296 manual Faults and causes, Piston And Cylinder

PISTON AND CYLINDER

On saws 40 and 45, check the rubber sealing on the shaft seat. Change the shaft seat, if necessary.

Faults and causes

Score marks on the piston.

1.Incorrect carburettor setting max. speed too high

2.Too low octane fuel.

3.Too little or incorrect oil in the fuel.

Carbon build-up

1.Incorrect carburettor setting max. speed too low.

2.Too much or incorrect oil in the fuel.

Piston ring breakage

1.Excessive engine speed

2.Piston ring worn out.

3.Oversized piston ring groove.

110 – English