Inboard Experts

[riprunner]

I have a 350 MPI left hand wheel on a 23 CC with a 1.5-1 transmission as well. The boat oringally had a 1.1 transmission that we swapped out because sail boats were passing us. The new one we put in was an older transmission that was originally right hand but we converted it over to configure it with the new engine. You could do this with the older ones I guess.

At 3200rpm I'm running 19-20knots on average at 10.5GPH and I'm spinning a 15/17 wheel. This seems a bit slower than knot working's boat. Any suggestions....?