CD30 Engine Mount Replacement

[Forrest]

3 of the 4 engine mounts gave up on me within the last 2 months. Wasn't able to replace with the engine in so we took it out.

General question - what are other's experiences relative to engine mount replacement. I may have waited too long - 33 years.

In any event, the engine looks spiffy in it's new gray paint!

[Gary H]

I recently replaced the mounts on a CD22D. A pretty straight forward job once the engine is out. You will need to re-align the engine once it is done. Wile the engine is out, you should probably replace the shaft, shaft log hose, and cutless bearing. I tired to do everything that would avoid me from ever having to take the engine out again.

[sgbernd]

I replaced mine on my MD7 when the engine was out. (Failing mounts was one of the reasons I pulled the engine). I ordered a set of 4 new ones, then, one by one, used a carpenters bubble level to set each new mount to the identical height of the old one I was replacing. When the engine went back in, they were all set perfectly and I only had to make very minor adjustment. It went really well. Just a tip to reduce the time you spend in the locker, contorted to some impossible position with your feeler gauge.

S. G. Bernd

[Forrest]

Thanks for the tip. The mounts are already on the boat (used calipers to determine height). Engine is ready to go on. Spent a couple of hours cleaning the bilge. A recent post identifying the need for another bilge access is top of mind. It would have turned a 2 hour job into a 30 minute job!

Forrest

[Maine_Buzzard]

Got your stuffing box hose replaced? Now is the time!

[Bob Brown]

Peter,

Inspection of the engine bed may be required before replacing the mounts. They are usually made of soft steel with many at the end of their useful life. There are many threads on this site that address this issue.

BB

[ckreitlein]

Is your engine fresh water cooled?

[Forrest]

The engine is not fresh water cooled - it has a heat exchanger.

[Sea Hunt Video]

The engine is not fresh water cooled - it has a heat exchanger.

Forrest:

I thought having a heat exchanger meant the engine was fresh water cooled and the heat exchanger was to cool the internal "heated" fresh water with exterior raw water (either salt water or lake water).

[Oswego John]

I think that it is safe to say that we are witnessing one of the rare occasions in life, as is a total solar eclipse, where everyone concerned is correct.

O J

[Forrest]

Oops - I forgot that fresh water and raw water are different. Here's what Mr. Google said:

"At temperatures above 190 degrees farenheit salt begins to
cake onto surrounding water jackets. The decreased cooling efficiency and the
corrosion are very detrimental. Fresh water cooling in a salt environment will
minimize the number of engine components that will sustain damage from contact
with the more highly corrosive salt water.

With fresh water cooling, you can mix ethylene glycol with the engine coolant
to protect against freezing and raise the boiling point as well."

i.e., my engine is fresh water cooled.

Forrest