I removed an older style R4D7 Mitubishi engine 100 HP from a 50' banca boat... it ran ok but was not enough HP for my liking. I replaced this engine with 140 HP turbo Deisel, and now I am happy with the bancero performance. Meanwhile, I pulled the head on the Mitubishi, to inspect. Pistons are ok, minimal play in compression chambers... I replaced the head gasket on the old Mitubishi engine to improve its overall performance when I put the head back on.... and test ran it, and its ready for re-installation. STARTS FIRST CLICK. Just bolt in the engine and tranny and connect to the 1 1/4