Rotax 912 cylinder head

[kitfox5v]

Russ,
I think that's a good idea. What's the worst that could happen? Exhaust leak he already had. Sure saves a lot of $. Sorry I did'nt get to drop by while I was out your way. Maybe next time. Eddie

[mr bill]

Cracked cylinder heads on Lycoming and Continental engines have repaired by welding for many years and they operate at much higher cylinder head temperatures than the Rotax, Harrison in Indiana is one company that does it, there are others I'm sure.

[Av8r3400]

If done properly, this could be a valid method of repair.

Keep in mind the extremely tight tolerances of the Rotax engine compared to the old style engines. Proper preheating and welding filler material are critical to keep warping to a minimum. A warped cylinder to head mating surface will render the head junk.

Which is exactly where you are now, so nothing ventured, nothing gained.