Caveman22
Active Member
- Mar 6, 2020
- 225
- Boat Info
- 310 Sundancer 1999
- Engines
- 350 Mercruisers Blue Water, V drives
My 1999 350 mag runs runs very rich, especially on startup. I had the spark plugs out today while changing the exhaust manifold's and all the plugs were black with carbon. When I start it cold, it smokes and you could smell the fuel. Seems to get better when warming up. Any ideas what could cause this?