Fitting Cowl

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Fitting Cowl

Postby FredHoffman » Wed Dec 16, 2015 10:51 pm

Hit a small roadblock on fitting my cowl. The hole in the cowl is smaller than the Rotax 912 prop flange! In order to make this work it looks like I will be removing the entire reinforcing lip around the prop flange hole on the cowl. I also have a prop spacer that won't make it any better, adding 1-2 mm in diameter. What have others done?

Fred
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cowl.jpg
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Re: Fitting Cowl

Postby SuperFly » Thu Dec 17, 2015 9:05 am

I cut mine out Fred. Didnt have a choice. Dont worry about the strength (I was at first), once the cowl is all fastened together, its pretty rigid. Remember to leave some clearance for engine movement, it moves quite a bit. I have about 3/8" to 1/2" of clearance around mine.
Best,
Ben Schneider
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Re: Fitting Cowl

Postby FredHoffman » Thu Dec 17, 2015 9:12 am

Thanks, I was worried about making it weaker too. Today looks like I'm cutting lots of fiberglass !

Fred
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Re: Fitting Cowl

Postby scubarider2 » Thu Dec 17, 2015 12:34 pm

I cut mine from the back end making it shorter. It just touches the exhaust and almost against the radiator. I wish I would have done the front as well.
Dennis
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Re: Fitting Cowl

Postby gkremers » Thu Dec 17, 2015 6:54 pm

Fred,
Thought I would send a few pics that might help. I did use a 1" spacer from Saber on the prop flange, it gives you a little more room near the left from exhaust pipe. Mine is also set with a 1/4" space between the spinner back plate and the cowl.

DSC_0024.JPG
Test fit, you can see it needs some work to match up


DSC_0172.JPG
Trimmed for the prop flange


DSC_0060.JPG
Trimming back side of inlet area


DSC_0027.JPG
1/4" spacing between spinner and cowl


IMG_1234.jpg
Saber Spacer
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Re: Fitting Cowl

Postby gkremers » Thu Dec 17, 2015 6:57 pm

Forgot one.
You'll also need to trim a good amount from the lower cowl to clear the muffler

DSC_0062.JPG
Lower cowl trim for muffler clearance


Take care
Gary
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Re: Fitting Cowl

Postby FredHoffman » Sat Dec 19, 2015 3:53 pm

Thanks Gary, those pictures help.


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