With the engine out of the wifes Pilot getting a complete rebuild I kicked around the thought of installing a fan cooled 440 snowmobile engine into hers, it makes a honest 35hp with the single carb and I am told 35hop with dual carbs, its a great running engine I had it mounted in a FL250 frame for a while, it has electric start and a easy to mount casnister exhaust system, I think I will stick to the Pilot engine since its modified and makes about 50 hp like this .