dpmulvey
Active Member
- Dec 19, 2007
- 4,188
- Boat Info
- 1999/2007 330 Sundancer Hardtop.
- Engines
- 6.2 Merc Horixons
1.5:1 Velvet Drives
Ironically, the same noise thing happened to me last weekend. I was trimming the boat and went bow high and the noise happened. When I lowered the bow, it disappeared. At first I thought I had blown an exhaust hose off a manifold. BTDT. Repeated the action a couple of times. The gauges never faltered.
The only thing I could think of is the exhaust gasses were being sucked in to the prop and driven out the back. However, the explanation of fouled underwater exhaust is plausible. Maybe at a certain running angle and a certain current, a back pressure is created against the underwater exhaust.
I am planning a trip this weekend weather permitting and am going to go under her to see if there is any explanation.
The reason behind the dual exhaust system is to make the exhaust quieter. I don't know what year the transition took place, but having ridded in both you can definately tell the difference.
The only thing I could think of is the exhaust gasses were being sucked in to the prop and driven out the back. However, the explanation of fouled underwater exhaust is plausible. Maybe at a certain running angle and a certain current, a back pressure is created against the underwater exhaust.
I am planning a trip this weekend weather permitting and am going to go under her to see if there is any explanation.
The reason behind the dual exhaust system is to make the exhaust quieter. I don't know what year the transition took place, but having ridded in both you can definately tell the difference.