The plug wires are not correct for this engine. They look like they belong to an OHV engine because of the long boots. I thought they would be OK for now, but when I ran the boat on the water for the first time, it stumbled, shook, and would not go over 1500 RPM in gear. I found 2 plug wires pulled from the plugs. When the engine is running, they work their way loose due to the extended boots.