Fitting a Yanmar and Aquadrive

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Engine beds :

Engine beds

I was originally going to make the engine beds by laminating solid pieces of timber to get the required depth, using coach screws to fix the mountings down. I decided against this, instead making each bed with two pieces of 12mm marine ply and a rebated hardwood top, glued together with epoxy resin. At this stage I have only glued one of the two ply sides on - the other piece is just screwed in position. They have yet to be fitted and have been cut oversize. They should be easy to cut when fitting as I'll be able to use a jigsaw. Solid engine beds of this thickness would be more difficult to cut on site.

A4 stainless bolts hold the engine mounts in place, and these locate into a 6mm thick stainless strip drilled and tapped at the correct positions. The dimensions were taken from the Yanmar leaflet, which has a very small dimensioned sketch of the 1GM10 on the back. To stop the strip dropping down when the bolts are removed I glued a couple of strips on the inside faces of the ply - the photo below shows it being slid into position, resting on these strips:

Engine bed - detail

Preparing to install the engine beds :

To make sure the beds are installed in the right place I made up a former, again using the dimensions from the Yanmar 1GM10 leaflet. The top surface of the beds should be about 10mm below the drive coupling centre-line (it can be altered by raising or lowering the nuts on the engine mounting studs). I used a sheet of scrap 6mm ply to make the former - this should allow a little adjustment for the final installation.

engine bed former

(More of this to follow - work in progress Feb 1, 2007)

www.corribee.org - inboard engines