El Capitan
Well-Known Member
- Jul 9, 2014
- 3,829
- Boat Info
- 1970 SRV 180 w 2.5L Mercruiser.
2000 Ford Expedition Eddie Bauer
- Engines
- 120HP Mercruiser
Uh, no. Under propping is ... no bueno, especially on IO's. Your OB will soon explain to you why its no bueno. Next, try a 12" prop and maybe you can reach 8500 rpms!