RPM,S and MPH For a 228

[scatgo]

Got my first boat. Fixer upper. It is a 1980 20 FT Wellcraft. Can some one tell me the max rpm and mph to expect? I think the out drive is a 50 to 1. Not sure about the pitch on the prop .Sure that dont help. O yea. 228 305 with a 4 barrel carb.

Thanks
Chris

 

[500dollar744ti]

prob 45-50mph trimmed out. iirc rpm should be 4200-4600

 

[Bondo]

Got my first boat. Fixer upper. It is a 1980 20 FT Wellcraft. Can some one tell me the max rpm and mph to expect? I think the out drive is a 50 to 1. Not sure about the pitch on the prop .Sure that dont help. O yea. 228 305 with a 4 barrel carb.

Thanks
Chris

Ayuh,.... Prop it for Wot rpm of 4400/ 4800, 'n the speed is whatever it is,.....