Originally posted by goop
i bought the new os engine after giving one a test run that a friend has. the engine produces insane power but have found out that the engine has a very short life. i have about 3/4 of a gallon in mine and it has almost no compression and its very loose. i am very disappointed in o.s. for putting this engine on the market.
i'm running OS VZ-B engine and 3 gallon(25%) has through the engine. and i did not find any problem with the compresion. also there is about 3 of my friend also using VZ-B and their engine still have a good compression.
so i think is the way you break-in the engine that cause your engine loose the compression.