Temporary engine mounts, Yanmar 8hp

[David52]

Hello All,

Looking for some guidance, as I find myself in a small town on the Australian coast, in a 26 foot grp boat, with an 8hp single cylinder Yanmar with four broken engine mounts. I have 280 miles to go until home port.

The broken mounts caused the prop shaft to snap, and I have had a new shaft machined which is in the boat. The alignment that I can achieve does not allow enough room for new yanmar mounts, and those which were removed were non standard "rubber donut" under a steel cup welded to the engine bearer (14 inch lon flat steel bar screwed to th engine bed. To get a reasonable alignment I have chocked up each mount with hard wood blocks, and the measurements suggest that the only option is a custom mount (usually for a genset) which can be delivered in a couple of weeks.

My thoughts are to " hard" bolt the engine to the bed, using the Wooden blocks as mounts. I was thinking of inverting an m12 bolt in each stack of chocks, glueing and screwing together, then bolting the assembly to the steel bearers.
There is a flexible coupling on the gearbox/prop shaft.

Does this sound like a stupid idea? I would quite like to get home and the boat has been stuck for 2 weeks already sorting out the prop shaft.

Cheers,

Greyish Beard

 

[VicS]

The solution to Dylan Winter's engine mounting problems in his Mirror Offshore was to fabricate new ones from Landrover engine mountings.

I am sure you'll find all the details in his KTL videos

Often wonder though if they were a tad soft and if without a flexible coupling they may have been a contributing factor to the gearbox failure that drove him to favour outboard engines

 

[forelle541]

As a get you home rid gin mounts should be ok, my old folkboat had the engine bolted straight down.

 

[CAPTAIN FANTASTIC]

If you can get a very good alignment then your method will work; as other had said, you can bolt the engine straight to the boat, the whole boat will shake a bit but if the alignment is good, you should have no problem.