Topic: Engine upgrade... Petter to Yanmar1GM10

I would like to hear from any Contessa owner who took out the Petter and replaced it with the Yanmar 1GM10.
I am sure this is the engine I will repower with, so therefore any info or suggestions, problems encountered etc, from you on the placement of the new engine mounts, shaft or exhaust issues will be welcomed.

For those with a Petter eventually I will have a great Petter ENGINE to sell; with a crappy transmission.  Engine will work as a replacement or a parts engine.

Thanks  paul

Re: Engine upgrade... Petter to Yanmar1GM10

I did the same swap. I had to remove the mounting rails in the boat and glass in new ones. The metal mounts between the engine and the rubber mounts needed to be modified to make the engine sit low enough. I made a plywood cutout of the engine by blowwing up the side/top/front view diagrams from the manual. The plywood model was then suspended from the cockpit floor to determine the new mounts and rails dimensions.