Rotax 85 hp engines in jet boats

[camesser]

I am considering buying a 1995 Sea Doo jet boat that is powered with twin 85 hp Rotax motors. What should I be concerned with regarding these motors. Are they expensive to work on? What troubles are they prone to experience? Thank you for any helpful information.

 

[Trent]

Re: Rotax 85 hp engines in jet boats

Actually I have one of these. Speedster. One thing to check. Crank one engine at a time and see if it smokes ALOT like a smoke screen. They have a problem with the rotory valves seals. If too much oil leaks buy these seals during "no use" it can hydroloc the engine. Depends on which seal.<br /><br />Anyway do make sure you do a "seatrial". These boats SUCK FUEL. And you MUST use Seadoo Oil and NOT TCW III like most watercooled engines. <br />Its a blast to drive but it does bounce with a full load onboard (needs trim tabs).<br /><br />To ask more questions go here: web page