I am refitting a 1977 Hunter 30. I upgraded to a new Yanmar 3GM30f. I also replaced the prop, shaft, strut, and log. I have both the PSS shaft seal and the R
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Couple Possibilities..
The engine shouldn't bounce around but just kinda vibrate - it's a diesel. What could cause the bouncing, perhaps, is different power output on the cylinders. A couple things might improve this if it hasn't been done already: 1. Bleed the fuel lines up to the injectors. I've heard that the newer engines are self-bleeding but I don't know if that's true or not. 2. If the engine isn't brand new consider adjusting the valves so they are even. Also, the fore and aft motor mounts might look the same but they're different. Look on the side of the neoprene and there'll be a number which I believe is in Kilograms. The larger pair go aft to support the additional weight of the transmission and prop shaft. Hope there's something here that helps.
The engine shouldn't bounce around but just kinda vibrate - it's a diesel. What could cause the bouncing, perhaps, is different power output on the cylinders. A couple things might improve this if it hasn't been done already: 1. Bleed the fuel lines up to the injectors. I've heard that the newer engines are self-bleeding but I don't know if that's true or not. 2. If the engine isn't brand new consider adjusting the valves so they are even. Also, the fore and aft motor mounts might look the same but they're different. Look on the side of the neoprene and there'll be a number which I believe is in Kilograms. The larger pair go aft to support the additional weight of the transmission and prop shaft. Hope there's something here that helps.
New Mounts?
I am assuming that you have new mounts. If not it would be wise to start with new ones. You should be able to shake the engine a bit with the mounts but not move it or hear a rattle or clank. Any noise when you try to move or shake the engine might indicate loose bolts on the mounts. On my 3gmf the "100" mounts go on the front and the "75" mounts go on the rear. After aligning the engine with the coupling there should be very little vibration and the shaft should not have any movement other than round and round.
I am assuming that you have new mounts. If not it would be wise to start with new ones. You should be able to shake the engine a bit with the mounts but not move it or hear a rattle or clank. Any noise when you try to move or shake the engine might indicate loose bolts on the mounts. On my 3gmf the "100" mounts go on the front and the "75" mounts go on the rear. After aligning the engine with the coupling there should be very little vibration and the shaft should not have any movement other than round and round.
Mounts
Dear Peter, The mounts you showed on your e-mail are the standard Yanmar mounts. These mounts are designed to have a great deal of movement to help in controlling vibrations. The Yanmar mounts do have an extra amount of movement but using the R
Dear Peter, The mounts you showed on your e-mail are the standard Yanmar mounts. These mounts are designed to have a great deal of movement to help in controlling vibrations. The Yanmar mounts do have an extra amount of movement but using the R
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