"Hi all --
I have a 2GM20F &#
"Hi all --
I have a 2GM20F (16 hp) on a 30' S2 sailboat that has developed a problem over the past year or so. When shifting into forward, I get a clanking noise and a strong shaking of the engine (actually violent might be a better descriptor). It occurs when shifting into forward and not when it's cold, only after it's warmed up. It is smooth through all rpm's in both reverse and neutral. I can usually get rid of the shaking by powering up past 1800 rpm's OR (this might be important) when I add pressure to the shifter lever from the cockpit. I've disconnected the transmission cable and tried manually shifting the transmission. Again, it will shake/make noise unless I put a bit of pressure on the shift mechanism, then it will run smooth again. I've adjusted the cable at the transmission, but no luck on solving the problem.
Of note, I changed the Yanmar mounts last year thinking it might be the mounts and at the same time had a bent strut professionally straightened. Shaft alignment now is very good to excellent.
Thanks in advance for any or all help."
I have a 2GM20F &#
"Hi all --
I have a 2GM20F (16 hp) on a 30' S2 sailboat that has developed a problem over the past year or so. When shifting into forward, I get a clanking noise and a strong shaking of the engine (actually violent might be a better descriptor). It occurs when shifting into forward and not when it's cold, only after it's warmed up. It is smooth through all rpm's in both reverse and neutral. I can usually get rid of the shaking by powering up past 1800 rpm's OR (this might be important) when I add pressure to the shifter lever from the cockpit. I've disconnected the transmission cable and tried manually shifting the transmission. Again, it will shake/make noise unless I put a bit of pressure on the shift mechanism, then it will run smooth again. I've adjusted the cable at the transmission, but no luck on solving the problem.
Of note, I changed the Yanmar mounts last year thinking it might be the mounts and at the same time had a bent strut professionally straightened. Shaft alignment now is very good to excellent.
Thanks in advance for any or all help."