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Go Back   SailNet Community > Boat Builders Row > Pacific Seacraft > PSC 34 Engine Mounts
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Thread: PSC 34 Engine Mounts Reply to Thread
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Topic Review (Newest First)
04-12-2010 09:41 PM
jlb40514
'86 37 Refurb

Hi all, still refurbing. I finally got the motor mount lag screws out (or most of them). Thank goodness for Unscrewums! On the replacement lag bolts, should I go back in with 316 Stainless or Silicon Bronze?

Jeff
02-02-2010 10:50 PM
MC1 Consider giving Pacific Seacraft a call directly if you want a quick and reliable answer (then post it here for future reference please).
02-02-2010 08:35 PM
jlb40514 My motor mount holes seem to be in good shape. I just like through bolting better than lag bolts. That said, does anybody know how long the originally installed lag bolts are supposed to be? Just wondered if previous owners have installed longer lag bolts already.

Thanks,
Jeff
01-28-2010 04:57 PM
niftynickers Jeff,
If the lag bolt holes are stripped,mine were, you can drive an epoxy coated dowel into the hole and then drill a new lag bolt hole or as Bill said if the holes are OK then slightly longer lags will work.
Dianne and Chuck Burke S/V NiftyNickers C37 #139
01-28-2010 03:08 PM
wsmurdoch If your lag bolts have stripped out, a possible fix is to cut four short lengths of angle iron, drill and tap one side of each for two machine screws that will hold each engine mount in place, drill the other side for two bolts or lag bolts to enter the engine bearing members from the side, then attach the pieces of angle iron to the engine bearing members. We looked at doing this on my boat. If memory serves, the forward pieces of angle iron could be thru bolted in place and the aft ones could be secured with lag screws. My old holes were good, and we just used slightly longer stainless lag screws.

Bill Murdoch
1988 PSC 34
Irish Eyes
01-27-2010 07:24 PM
jlb40514
Change lags to bolts/nuts

I'm restoring an '86 37. Has anyone replaced their motor mount lag bolts with machine thread bolts and nuts? I'm not sure how I would get to the underside to access the nuts, but lag bolts can strip out after time.

Thanks,
Jeff
09-30-2009 11:50 AM
Lansdowne Agreed, the Yanmar mounts are good. Not only the alignment when you change the mounts, but every time you put the boat back in the water. Very hard to get yourself to do this, but the best thing you can do for your engine.
06-29-2009 06:34 PM
wsmurdoch Four years ago I replaced the engine mounts under my 3HM35F engine. The bolt in the forward port mount had broken, we were cruising, and I was away from my more serious tools. A mechanic did most of the work; I was a watcher and helper. The new mounts were Yanmar. We separated the engine coupling and lifted the engine with a PortaPower hydraulic jack placed under the oil pan. We took the opportunity to replace the lag screws into the engine beds with new stainless screws. The re-alignment was not difficult although up/down errors were easier to correct than side to side errors especially with the relatively flexible mounts.

Bill Murdoch
Irish Eyes
1988 PSC34
06-27-2009 10:33 PM
Redfish Carl,

I just replaced the mounts on my Yanmar 3HM35F two months ago. I did all the work my self so I have taken the hard road, but it is well worth it. I know the procedures well and can allign the engine again with no problems. Installing the new mounts is not bad. The engine re-allignment was the most difficult part for us.

I researched the availble aftermarket mounts and decided to use the Yanmar mounts. In the end, it was an easy choice. I checked with three Yanmar distributors, a Yanmar mechanic, and my manual and all confirmed the 3HM35F uses four #100 mounts. This is important because some of the small engines used different mounts front and back. I can give you the Yanmar part # but I don't have it in front of me right now.

Please forgive me, but it is late and my wife and I have been traveling in our boat up the Tombigbee River for the last seven days to get out of harms way for hurricane season. It would take me several hours to type a proper reply to your questions. I would be happy to talk to you about my experiences and how we did things. If you would like to discuss it please send me your phone numner and I can call you tomorrow afternoon. My e-mail address is jlloftis3@yahoo.com.

I talked to several mechanics before undertaking the project. I had one mechanic flat out lie to me and try to rip me off. It will be a long frustrating processs, but I am so glad I did it myself.

John L.
s/v Redfish
1988 Crealock 34, #95
06-26-2009 08:19 PM
cvsheppard
PSC 34 Engine Mounts

You're right, I was forgetful not to add that bit of information.
I have a Yanmar Diesel 3HM35F.

Carl

s/v Credence II
PSC 34 #159
Portland, Or.
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