Engine swap

[bones1]

Spanking new member here with a question please. I have a Generac 5500 watt generator with a 11 hp Generac (I believe) engine on it. Can the gas engine be replaced with a 10 hp diesel or would there be a shaft/mounting problem between the two? Or is this just not done?. These diesels are the Yanmar clones you see for $600.00. I think I have a good reason to attempt this conversion as I want to install the generator in my M35A2 and run it off one of the spare 50 gallon diesel tanks.
Sorry . That's two questions.

[bobodu]

You might have a problem with a tapered shaft.

[bgsengine]

And also power output - unless your diesel runs at 3750 RPM or your gas engine runs at 1875 RPM - the genny won't work even if the engine runs and hooks up fine.

[StarTech]

Tapered shaft problem for one. Mounting another. The 10hp Yanmar clones do appear to capable of 3600 RPMs at the crankshaft is what the 2 pole Generac generator head needs.

Here is an idea which depends on where you are. Check this out on Ebay. http://www.ebay.com/itm/Sigma-6000-Watt-Open-Frame-Diesel-Generator-with-Electric-Start-/251351827372

If you willing to spend the 600.00 why not sell the Generac and spend a few hundred more and get a brand new generator with a warranty.

I enjoying modifying equipment as about much as others but sometimes it just gets too expensive than what I buy new.

[bones1]

Thanks for the input. Looks like too much trouble to fool with it. What I really need to find is an Onan diesel genset out of a motorhome.