Rotax climb rate was 800' fpm at Vx with just me on board.
Yamaha climb rate is 1,500 fpm at Vx with me solo.
Rotax WOT cruise was 82 mph.
Yamaha WOT cruise is 103 mph and still accelerating. I backed off on account of rough air. My guess is it would top out at 105-107 mph.
Rotax fuel burn at 5,500 rpm cruise was 4.5 gph.
Yamaha fuel burn at same speed, 70mph, was 2.5 gph.
Wild West Aircraft supplied my engine mount, ceramic coated header, air box and coolant tank plus a Rotax 914 radiator.
Total cost for the project is under 14k. I mounted the engine on a temporary wood stand and worked out all of the running, electrical and radiator plumbing challenges ahead of the install because I wanted to keep flying my plane while waiting for my Luga prop which took about 7 weeks from Ukraine.
Would there be anything I would do differently if I had to do it over again? Nope.
![Smile :)](./images/smilies/icon_smile.gif)
Needless to say, I'm a happy pilot! Now I just have to find me a Yamaha Powered sticker to replace the Rotax Powered stickers that I peeled off!
Please don't misconstrue my meaning here. I loved my Rotax and think they are great engines. Cost was one of the major factors that made me decide to go with the Yamaha. The better performance was a bonus. And the Yamaha set up is a little heavier, how much I dont know, I have'nt weighed the plane yet. My guess is between 15-20 lbs.