Posts: 433
Location: Cedarburg, Wisconsin | If you are getting 48 I think you are just about maxed out right now. I ran a hot 150 with a kicker on my aluminum 18.5'er and never saw over 46 gps with a normal load of three guys and gear.
If you are serious about getting every last mph out of your rig, you need to get an accurate tach and water pressure gage. Then you need to run WOT at max trim to get the rpm reading. From there you can compare it to the mfg. rpm range suggestions and adjust pitch accordingly. It's a lot of work and when you start playing with props and getting them worked, and playing with the mounting height of the motor, you can expect a lot of time wasted and $$$ out the window. But if money isn't a problem, go for it.
You need to get the motor height right first or you are just chasing your tail so to speak. Plus if you change props the height might have to change again too. Changing pitches won't have the effect it should and you will get very confused all over again. Been there, done that, not fun.
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