I will give you some history:
Compact radial build a reduction unit that was held on by 3 bolts. After having these units in service everyone of these failed. Leon recalled these units but he had some that never did get returned. They went on new airplanes and sold to customers like me. After loosing my prop and reduction unit at 1000' to say I was upset was not saying enough.
I call and speak with some man whom answered the phone, he was the one who informed me about these failures. It was not Leon the owner. When I mentioned this to him he cussed me up one wall then down the other. He was upset or pissed.
He blamed everyone but his product for my incident that could have killed me. It cost me over 1300 bucks to repair this engine. This was a brand new engine and airplane. 4 hrs total time on both.
He should have replaced my parts and no charge to me and smiled doing it. He bitched as I forked over 1300 bucks to repair my engine. Never again. I will not fly behind two strokes. You can have them.
Tony
I do like the 1/2 vw or the vw line of aviation engines. I would never pass up a 4 stroke.
Tony
I believe the Italian engine in question might be a Polini. I have a recent trike with a Polini Thor-250 that runs like a champ. It is only 36 hp, but is water-cooled, and has been flawless in the first ten hours. I will post any interesting results as the hours start to add up. So far, so good.
Engine Picture from facebook....
https://scontent-b-iad.xx.fbcdn.net/...77237326_o.jpg
Definitely a Polini.
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Michael
So on the subject of engines. I have a Rotax 503 from a snowmobile. Is it comparable with the gear drives for use in an airframe? I've read there are some differences in the case that would affect the bolt patterns.