
What Patti said. Diameter is push. The more prop dia. you can turn and get out into clean air, the better IMO.WhirlWind Propellers said:I think you will do better with a larger diameter like a 76". I'd recommend the 2-blade Whisper Tip 2.0 (12" wide) in 76" diameter - if your SB 350 is stock (300 to 350 HP) with the 1.77 - you can turn the 76" prop up to 4900 or 5000 RPMs on your motor and the prop will still only be turning 2700 to 2800 RPM.