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Hello I recently purchased a new prop for my 75 9.9 10r75c. New prop is a Solas Amita tri blade part # 2111-093-10 I made sure to cross reference the model number and it appears correct however the issue I'm having is not enough space to insert the cotter pin. It seems as though the prop is...

Hello I'm currently working on a 1975 johnson 9.9 which blew a head gasket however I also noticed what looks like a disintegrated rubber seal stuck between the 6 holes just above the cavitation plate. So my first question is what exactly is the purpose of the 6 holes above the cavitation plate...

Hello Couple weeks ago the head gasket on my 75 9.9 seahorse decided to go on me so when I got it home I tested the compression on both cylinders which read 90 psi on the top and 88 on the bottom. I knew it was the head gasket that went due to the top spark plug being "steam cleaned" and of...