Werner1976
New member
Hi there, last year I bought a speedboat with a yamaha 90 hp from 1988. A 2 stroke 3 cylinder. The first problem that came up, is that the engine lowers at a slow speed when the power trim is fully trimmed up. I have already replaced all seals on both rods and also on the middle cylinder. However problem remains. I also replaced the seals at the manually lowering / lifting screw. The oil that i use is dexron 2. Anyone an idea?
(Sorry for my bad English)
(Sorry for my bad English)