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Looking for help on a K/B drum rotor 3.5 inboard. I’m running 50% what should the head clearance be and what’s the best way to measure it?
Head clearance
- Thread starter NAMBA860
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Set the head clearance at .006
Dave
Dave
Kristy Wallace
Active Member
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- Jan 11, 2022
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Kristy Wallace
Active Member
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Just use some small soft solder cut a piece the dia of the bore,and place it center across the piston /piston pin.
Or use a dial and zero out with the button on a flat even surface,get zero then replace button in engine and hand turn over engine with dial connected to button..
Or use a dial and zero out with the button on a flat even surface,get zero then replace button in engine and hand turn over engine with dial connected to button..
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That stock K&B rod will not handle that, for long..... .009" on 50% is pushing it.... like Kristy said, .010" on 50%, and run it....stay on fat side of needle with a cold plug.
Personally, I like a depth micrometer, and also used shims that have been compressed, if in otherwise good shape....have yet to poof ANY engine.
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- May 1, 2023
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I set my outboard somewhere around .008" with 50%. like doubled the power. first time I ran it was a half turn lean and the tunnel hull literally shot itself 4' into the air.
Kristy Wallace
Active Member
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- 28
Enjoy,
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