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Lawrence Doty

Should be an easy fix.

There are 6 o-rings. 1 each for the 4 head bolts and 2 more for the head. There is also a shim under the small head o-ring.

Drain the water, pull the head off, remove the old O-rings and check to insure you have the shim. Then just install the new O-rings, bolt on the head and refill with water.

You should be good-to-go.

I had the inner head o-ring go out on mine (turned the motor into a waterpump…). after replacing all the O-rings, and installing the shim that was missing, the motor ran great at the last race.