Coleevans321
Member
- Joined
- Dec 20, 2020
- Threads
- 4
- Messages
- 18
I have a kohler motor powering a prodrive boat motor. Customers problem is no power under load. I have cleaned carb and installed new heads, valves, intake gaskets, head gaskets, and spark plugs. Still has not corrected the problem. Used kohler spark testers to test ignition coils and they tested good. Leak down test was good and 175 compression on both cylinders. Idles like a new motor but at high idle small amounts of black smoke can be seen coming out of muffler. Raw fuel? Any idea of where to look next would be appreciated.