Scout
New Member
- May 5, 2021
- 7
- Boat Info
- 2004 300DA Sundancer
- Engines
- Twin Mercruiser 5.0 MPI Bravo III
Hi all, my 300 Sundancer is all of a sudden is down on power. I used to be able to get it on plane with a boatful of people, fuel and gas while pulling tubes. Top speed was 40. Then suddenly a week ago it felt a little boggy and it really struggles to get on plane, top speed is now 35 with both engines at about 4100 RPM. I don't really care about top speed but it needs all of the HP to get on plane. Both engines perform the same. I had the marina take a look at it and they replaced cap, rotors, plugs, and plug wires and it didn't help. It has the 5L 260 HP motors. Anything else I can try? I'm not very mechanical so I'll probably have the marina do some more troubleshooting, too.