Rotax 503 two stroke.

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Uploaded by on Sep 20, 2009

This is a 503 Rotax in excellent shape, 138psi# in each cylinder.The biggest Fan cooled 2 stroke engine that Rotax had in production.

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  • Rotax also has a 582.

  • not the biggest. rotax had a 775 f/c

  • @douglasbeveridge dont forget the 775

  • Yeah, Many Alpines had 640's.

  • not the biggest fan cooled...they made a 640 cc fan cooled back some 25-30 years ago....

  • i owned a ski-doo blizzard 5500 with that engine......extremely reliable and pretty fast for the early 80's. suspension was terrible.

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