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Old 02-25-2017, 01:36 PM   #1
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Default Original equipment

Hey everyone looking at purchasing a new prop for my boat 92 Maxum Sr 1900 with a 3 liter bowRider
Currently it has a 17-pitch on it and it can be over rev pretty good . I know going 19 I would be okay but I've heard people running 21 on the same boat.. I will keep the 17 for when more people are in the boat and watersports but I want something that will push me the wife two lil ones and our gear at a pretty good pace. Out of curiosity what did this boat originally come with for a prop, I've been told 92 is most likely 115hp 3 liter although there's some discussion on that the 115 was more of a marketing ploy than anything being that the 2.5 was discontinued and the horsepower rating is actually a lot closer to 130..
Thanks for the help..
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Old 02-27-2017, 12:41 PM   #2
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What motor is on the boat?

What is the RPM at Wide Open Throttle (WOT)?
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Old 02-27-2017, 01:15 PM   #3
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Hi its the 3liter and its been awhile because of winter but im pretty sure it was above 5 grand 5300 when i forced it.. i run it at 4600 -4800 tops
I know the 19 will work but i thought if i could get the 21 with some rpm to spare i could get some more speed outa it
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Old 02-27-2017, 02:44 PM   #4
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The Max RPM range for that engine should be 4400 - 4800. You should get roughly a change of 200 rpm per 1" of pitch. So, if you're getting 5,300 rpm out of a 17" pitch, you would be looking at around 4,500 rpm out of a 21" pitch.

4500 is within the targetted operating range, but a little low IMHO. You would have slower hole shots and it will be quicker to recover and get back on plane if you end up chopping the throttle (such as when you need to cross someone's wake or come into a oddly large wave or wave set).
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