In terms of placement of the engine, WM Diesel
will custom make engine feet. I provided them with drawings and measurements of my existing engine bed
. With the engine feet and mounts they provided, the engine slotted straight onto the existing engine bed.
In making up drawings, measure everything very carefully, look up the measurements for the engine and gearbox
you have chosen, and work out whether the engine will be relocated. Take into account new output shaft, if used, etc and etc. Best to go through your calculations and measurements several times.
If keeping your old shaft, its a good time to take it along to a machine shop to check for true, and end for end it on refit
. A flexible coupling might be a good addition??
I guess you are in the process of assessing engine performance curves, engine compatability with gearboxes, prop speed, etc. In my case, the new engine has performance curves are very similar to the engine replaced, so I kept the old gearbox
and prop. The gearbox was completely rebuilt. Check that your existing fuel
lines are adequate for the new engine. May be a good time to rebuild
And of course, there is the issue of how to physically get the engines out and back in the boat. The list goes on.