Ring gap

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May 7, 2021 at 12:13 pm #237920
geary
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What’s the proper ring gap for a 1950 Johnson PO-15 and how do you calculate it !
May 7, 2021 at 12:31 pm #237921
Buccaneer
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It’s in the 3rd Edition OMC Manual, page 220……..
.005 to .012 gap.

I think a general rule of thumb is about .003″ gap, per cylinder diameter. Hence, a 2″ bore’s
ring gap about .006.

Prepare to be boarded!
- This reply was modified 4 years, 6 months ago by Buccaneer.
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