Originally Posted by EmeraldCoastSailor
My mounts seem fine but I also noticed more vibration at idle. It caused leakage via the dripless seal so I upped my idle a little to smooth things and the leakage went away.
Are you DIY
replacing or are you getting professional help?
I thought mine were fine too -- aside from a bit of rust, the rubber looks intact. A little over 1 year ago, my engine
started making an intermittent clunking sound in forward at low RPM
. At the advice
of many, we thought it was the flex-coupler which I replaced in March. This helped, but still the clunking sound. I then adjusted the valves, which also helped, but the clunking still persists.
My PSS started dripping, at first just a few tablespoons of water
, then more. We had some bottom work
done last month and I had the dripless replaced. After the yard work
, I noticed the alignment is off (engine it tilted down in the back). The yard mechanic
told me one of the mounts is stripped. I didn't have the right size wrench to verify and/or try to correct the alignment before heading home.
I am going to attempt this on my own. From what I've seen on the web, each mount can be replaced one at a time, trying to keep the height alignment the same. The trick seems to be supporting or lifting the engine
a bit. People have used car-jacks, blocks of wood
, wedges, inflatables fenders and a basketball (I think my kid's basketball is still in the garage
). The 3GM
is pretty small and doesn't weight that much. I think I can support it enough to remove the mounts.
As previously mentioned, I replaced the flex-coupler without too much difficulty. This entailed removing the transmission
and unbolting/bolting the new plate to the flywheel. I was pretty pleased that I did this on my own, in just a few hours, and didn't break or loose anything! I think replacing the mounts should require similar skill and effort.
I won't be back to the boat
till October. Good luck with whatever you decide,