So looking for advice on a internet buy. It seems to be all messed up. I got spark and fuel. 150 psi compression. When I put gas directly in the carb it will only fire while holding the starter button in. It starts to fire and shuts off as soon as I let go of the button. Things I noticed are oil is white/ milky so I am thinking it went under water. I might be wrong but with 150 psi can’t be a head gasket so any advice on where to go from here I would appreciate.