northern
Well-Known Member
- Jan 17, 2007
- 3,525
- Boat Info
- 380 Aft Cabin 1989 Charts Timezero radar Furuno
- Engines
- Twin 454 strait shaft
If you have a heat gun check the engine and exhaust risers and rubber exhaust piping when engine is good and when you have the problem. I do not think it is a cooling problem but if the manifold temp goes up you may be getting too much fuel if lower temp you may have not enough fuel. Put mark on spots you take temperature as targets so you get same area each time. Just a though. Never tried it but others may have. Could be dumb idea.