I did this swap about 2 years ago. It was a fairly simple project. I was quoted $14K to install the Beta 38 (I don't think they make a 35) with basic engine control panel, small alternator and no other accessories. I opted to do it myself and spent about $11K which included the upgraded C-Panel, 100 amp alternator and calorifier (water heater) fittings, custom engine mount feet and 10% Calif. sales tax. There was a problem in getting the custom feet to fit even after 3 tries so I modified them myself to fit. In their defense I gave them a drawing of the W-50 instead of all the impossible measurements they wanted but they couldn't seem to engineer the feet from this info for some reason. They did give it a good try though.
If I had it to do over again I would get the Balmar alternator made for the Beta engine instead of the their 100 amp option. The Balmar runs cooler and with higher output at lower rpm than their optional offering.
Make sure of the engine max rpm. I was lead to believe it was 3000 rpm and opted for the 2:1 trans. It turned out the engine had a max rpm of 3600 so I ended up cutting my prop down to 16" to get max rpm. I think the trans should have been 2.5:1. The dealer was surprised my engine was 3600 but I think they went through some kind of transition on the engines during that time. Anyway check that out before you buy.
I'm very pleased with the engine. It's so much smoother and quieter than the Westerbeast it replaced. It starts instantly and has more than enough power. Parts are readily available and the company even provides cross reference numbers for filters, belts, etc. It's easy to service due to the placement of the dip stick, filters and raw water pump. They even include an oil change pump mounted to the front of the engine.
Let me know if you need any more specific info. I'd be glad to help.
Jim
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