Great Lakes
Well-Known Member
- Oct 11, 2016
- 1,446
- Boat Info
- 2008 - Formula 400ss
- Engines
- Volvo Penta D6-350
425's and 370's have the same performance besides at WOT. That extra HP doesn't kick in until the top of the power curve, which this size boat rarely happens, at least for me. My buddy has same exact boat but with 370's and we cruise at same RPM's and get almost same burn rate. At top end I pull on him slightly but that's it.close quarter maneuvering, simple, Diesel (slight edge), HO, 370's in that order