Home › Forum › Ask A Member › 1958 35hp OMC drops one cylinder at low throttle › Re: 1958 35hp OMC drops one cylinder at low throttle
November 27, 2017 at 10:24 pm
#67991
Bottom crankshaft carbon seal may be cracked or broke. I have run on this problem before. At low speed the fuel charge in the lower cylinder will leak off onto the exhaust leg because all the bearings are needle bearing and fuel charge runs through them. At high speed the fuel charge doesn’t have time to drain off and it will run on both cylinders. If all else fails, pull the block and check the carbon seal.