lycoming 0540

Aircraft powered airboat discussion.
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hillbilly540
Southern Airboat Member
Posts: 221
Joined: Fri Feb 26, 2010 10:55 am
Location: wauchula

lycoming 0540

Post by hillbilly540 » Wed Apr 08, 2015 5:55 am

Has anyone switched from stock to 10:1 pistons in their s/v and if so what differences were noticeable and also what fuel system will feed the bigger pistons the best .
14'2" wide nose gilileo I0540 s/v , 74" sensenich NGQ

dusty burch
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Location: gainesville ,fl
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Re: lycoming 0540

Post by dusty burch » Thu Apr 09, 2015 9:04 pm

No change on fuel system it will give you more power but the bad thing is it will build more heat in your motor stick with stock it will last longer

lariat
Southern Airboat Member
Posts: 346
Joined: Sun Mar 27, 2011 8:27 pm

Re: lycoming 0540

Post by lariat » Fri Apr 10, 2015 5:24 am

I did it and gained about 200 rpms once everything seated. My boat is a hunt boat, so I run it pretty hard from time to time and have not had any heat issues. I only run AV gas and did put a heat extractor shroud on it. I've checked my CH temps after running dry for over a mile in the summer and they were fine. Another thing I did though that may have made a difference is I had my pistons ceramic coated on top and teflon skirted. No change to my fuel system.

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