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Old 11-19-2018, 02:32 AM   #1
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Default 1997 Maxum 3000 scr Prop selection. Help!!

Hi. We have a 1997 3000 scr with twin 4.3's alpha one gen 2s. Currently it has 3 blade 19p props installed and they need to be replaced. I was wondering if there is anyone out there with the same power package running 4 blades the could fill me in one the performance and cruise speeds they are getting. I am more concerned with cruise economy because we do a lot of long distance cruising. Thanks in advance!!
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Old 11-19-2018, 02:38 AM   #2
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Welcome aboard

Are the current props achieving proper WOT?
I recommend you see what Quicksilvers prop calculator recommends.
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Old 11-19-2018, 02:37 PM   #3
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Increasing cruise 'economy' typically requires either increasing pitch or number of blades in order to reduce RPM's at a relative cruise speed. However, this lowers max RPM and also tends to overload the engine.

Overloading the engine shortens the lifespan of the engine over time. You can potentially spend many thousands in an effort to save hundreds.
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Old 11-20-2018, 12:38 AM   #4
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Welcome aboard

Are the current props achieving proper WOT?
I recommend you see what Quicksilvers prop calculator recommends.
To be honest I haven't ran it wide open. I do know that it will cruise around 22-24 mph at about 3600-3700 rpm. I'm not to worried about fuel economy I'm just racing around the lake WOT.
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Old 11-20-2018, 02:47 AM   #5
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To be honest I haven't ran it wide open. I do know that it will cruise around 22-24 mph at about 3600-3700 rpm. I'm not to worried about fuel economy I'm just racing around the lake WOT.
I suspect you are proped correctly now. A 4 blade can improve time to plane but youíll need to decrease pitch.
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Old 11-20-2018, 02:23 PM   #6
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Quote:
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I am more concerned with cruise economy because we do a lot of long distance cruising.
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To be honest I haven't ran it wide open.
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Originally Posted by bestward27 View Post
I'm not to worried about fuel economy
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Originally Posted by bestward27 View Post
I'm just racing around the lake WOT.
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Old 11-20-2018, 04:58 PM   #7
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Yep he confused me as well with those statements.
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Old 11-22-2018, 02:42 AM   #8
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Opps. Sorry I meant to say that I will not be racing around the lake WOT.. Sorry for thwe confusion.
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