Assembling The Piston And Cylinder - RedMax GZ5000 Workshop Manual

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Repair Instructions

Faults and causes

Score marks on the piston (A)

1 Leakage, check not carried out.

2 Too low octane fuel.

3 Too low or incorrect oil in the fuel.

Carbon build-up (B)

1 Too much or incorrect oil in the fuel.

See Figure 63.

Piston ring breakage

1 Piston ring worn out.

2 Oversized piston ring groove.

7.23 Assembling the piston and cylinder

Oil the gudgeon pin bearing with two-stroke oil and

insert it into the crank rod. See figure 64.

Replace the piston with the arrow facing the ex-

haust port, and slide in the gudgeon pin and fit the

circlips. NOTE! Use new circlips. See figure 64, 65.

Oil the piston and piston ring with two-stroke oil.

Put a new cylinder base gasket in place. Apply

silicone (Order No. 503 26 72-01) on the gasket ac-

cording to figure 64b. Compress the piston ring and

carefully push the piston into the cylinder opening.

Attach the cylinder. The screws must be tightened

crosswise with a tightening torque of 8-10 Nm.

NOTE!

It is very important that the intake system is

sealed. Otherwise the engine may seize up.

- English

Fig 63

Fig 64

Fig 64b

Fig 65

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Table of Contents