I replaced all 4 of Calypso's engine mounts (Perkins 4-108) a while back. I used the R&D Engine Mounts offered by PYI, Inc. As none of the existing engine mount bolts met my standards ( a combo of lag and stripped threaded bolts) the job became slightly more complex than imagined at the start.
In 1970 Bruckmann's was laminating a steel plate on top of a wood base to build up the engine support frames. Once I understood what was under all the fiberglass and paint I decided to drill and tap new bolt holes, using the older ones if possible. The results when finished were worth the effort. I did re-align the engine/reduction gear to the prop shaft. The engine vibration transmitted through the hull was significantly reduced with the added benefit of being confident that the engine would stay put if the boat broached or was knocked down in a heavy sea. One of the least expensive tools to purchase that may help is a small scissor jack to be used in holding the engine in place while changing the mounts. Let me know if you want more info on how I approached the process, but there is much already written about the topic available. Martin Calypso 1970 C&C 43 Seattle [cid:D1BF9853-22F7-47FB-86F2-4115CE0BAF2F] From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Nate Flesness Sent: Wednesday, May 22, 2013 9:32 AM To: cnc-list@cnc-list.com Subject: Stus-List Yanmar Engine Mounts - aftermarket replacements? The front two engine mounts on my 2QM15 Yanmar are, to my surprise, broken (bolts fractured...discovered when.r&r transmission to redo seals). The Yanmar manual says to replace the mounts every couple of years, and there are some great websites explaining how critical all the anti-vibration specs are. On the other hand, though mine are certainly 33 years old, with the rubber long ago hardened, I had no apparent related issues (even though they were broken - and the transmission seal issue was caused by wire wrapping itself into the aft seal). Yanmar dealers sell the engine mounts for $130 each.... which seems completely unreasonable. So I'm looking at Joe DeMers MarineDiesel Direct who sells generic replacements for $39 each http://www.ebay.com/itm/ENGINE-MOUNTS-flexible-rubber-type-motor-mounts-new-/350143804850?pt=Boat_Parts_Accessories_Gear&hash=item51863275b2&vxp=mtr Anybody tried them? Nate "Sarah Jean" 1980 30-1 Siskiwit Bay Marina Lake Superior
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