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ROTAX 717 ???

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Posted (edited)

My stepson said he just bought a Rotax 717 - WAT-IZ-IT?  (Will it fly? But he didn't buy it for that)   any info appreciated.   EDMO

Edited by EDMO

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Posted

its a watercraft engine.  a quick google search will tell you more than you need to know :lol:

 

:BC:

 

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Posted

its a watercraft engine.  a quick google search will tell you more than you need to know :lol:

 

:BC:

 

Thanks Leni - Guess I need to learn how to "Google"!  Ha!  Ed

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Posted

My stepson said he just bought a Rotax 717 - WAT-IZ-IT?  (Will it fly? But he didn't buy it for that)   any info appreciated.   EDMO

it's a Seadoo Jet Ski/Boat Engine 717/720 (82mm x 68mm) 718.5cc. I have never seen anyone convert any of the older Seadoo Engines for Airplane use, 580/587, 650/657, 717/720, 787/800. But some parts do switch with Skidoo/Rotax. It could be done, but a lot of R&D Time & $$$ to convert one. If you left it Single ignition and could Hang it Upside Down you could use an Old Belt Drive. Seadoo's use a Threaded PTO. You would have to Block Off the Exhaust Cooling Holes and make a different WYE Pipe Flange.

Rotax Rick's 670(669cc) is 93hp@6350rpm. 669cc/93 = 7.2cc to make 1hp. So 718cc/7.2cc = 99.7hp@6350rpm. With Tuned Pipes, different Size Carbs, HP can very greatly.

670(78mm x 70mm) 669.2cc 11.5cr have been Big Bored to (82.5mm x 70mm) 748.6cc is the largest you can go on the 670. Stock Standard 670 was 115.7hp@7750rpm in a Sled. The 670HO 12.5cr was about 15-20hp more at same 7750rpm.

SKIDOO 93 Stock 670 115.7HP 7750RPMS.jpg

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