• Ive never run this engine, but i did a cold compression test that came out high and have videos of tests. 180psi front facing cylinder and 205 psi in the rear comes as shown in pictures video was before diassembly. Seems rather high compression to me oil was kinda sludge like boat was sitting many years not being run. Recommend disassemble and clean out oil pan to get rid of all the sludge before you try running it. Will post compression test videos to utube or can maybe send them in messaging thanks Comes as is no returns so make sure you know what your buying thanks