Home › Forum › Ask A Member › Leaking crankcase leads to overheat condition? › Re: Leaking crankcase leads to overheat condition?
Are you running at the factory recommended tempatures at all speeds? How about the spark plug heat range? Are we running the correct fixed jet for the atmosphere? Timing will cause overheating as well? Correct OMC oil used? Frank brought up two water passages thru the block, does this have full passage flow at all speeds? What was the reason to get your attention in the first place? It is a new motor compaired to what we work on. Have you checked your points gap to see if it remains the same thru the complete throttle range? Points gap may be changing in different throttle positions changing dwell during throttle advancement, worth a check to be sure anyway. You might try bonding the magneto plate to the cylinder head,
I have had intermitent loss of bond causing current floe reversing thru the other set of contact points causing burned contacts. Just a few ideas!