[quote]ORIGINAL: JPMacG

Some Magnum engines do have problems. You will do well with an O.S.

Boy that was an open ended statement.
I run all Magnums ranging from 1.20 4 strokers in a KMP OV-10, to 2 .61's 2 stoke in a Cessna 310, and 2 .91's 2 stroke in a Black Widow, and a .91 4 stroke in a Byron Bonanza. In multis you must have total reliability or you scratch one airplane. I've had one engine out with the Widow due to the muffler coming loose. That's it. These aircraft are flying for two years and counting. For the money they are a great value.