Max Prop pitch adjustment - SailNet Community
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post #1 of 16 Old 03-06-2009 Thread Starter
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Max Prop pitch adjustment

Just how difficult is that? I need to pitch and reading the Max Prop manual is a little overwhelming. But I figure if people can do it underwater I should be able to do it on dry land. Any words of advice or warning?

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post #2 of 16 Old 03-06-2009
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It's pretty easy once you've done it a few times. Take your time, follow the directions carefully and put it together dry as many times as it takes to be comfortable with it. I mark the proper X & Y coordinates with a paint pen before assembling the prop. This makes it easier to be sure I am pitching it correctly.
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post #3 of 16 Old 03-06-2009
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Call PYI, they have VERY good tech support. You'll likely need new cotter pins. I couldn't find them that small. They sell them for .09.

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post #4 of 16 Old 03-06-2009
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Quote:
Originally Posted by xort View Post
You'll likely need new cotter pins. I couldn't find them that small.
Do not use just any cotter pins in a Max Prop. They MUST be made of monel.
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post #5 of 16 Old 03-06-2009
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Ed,

I found it easier to have a second pair of hands too. FST is right -- just assemble it and break it down as many times as it takes to get familiar with it and you shouldn't have a problem.

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post #6 of 16 Old 03-06-2009
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Large rubber bands (the ones that are about 1/2" wide) help a bunch. Particularly the tree blade. The rubber bands hold the housing in place while you fiddle with the setting.

Easier than growing another hand
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post #7 of 16 Old 03-06-2009
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Hopefully you have some insight on what the CORRECT pitch is...seems like determining the correct pitch is more art than science...when the yard installed the MaxProp on my boat, they subsequently pulled the boat twice for further adjustment before they felt they had it right. This was a premium yard and yes, I was charged for the hauls...$$$.

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post #8 of 16 Old 03-06-2009 Thread Starter
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Sailingfool (aren't we all), you wrote Hopefully you have some insight on what the CORRECT pitch is...seems like determining the correct pitch is more art than science.

Since I don't seem to be able to get my engine up to speed I was going to reduce the pitch (I think reduce means less bite). It is presently set to "spec" but the RPMs are limited in its current configuration. Can get above 2800.

Others, thanks for the advice. Looks like it is worth getting to know the prop rather than just having the yard do it. I will contact PYI for the correct pins.

Thank you, all.

Ed Reiss
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post #9 of 16 Old 03-06-2009
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Maybe it would be worthwhile for you to create specific thread asking for pitch recommendations for your boat/engine combination.

You might get lucky, and improve your odds of a good guess.

David

David

1987 CS 36 Merlin "Kyrie"

"They drove a dump truck full of money up to my house. I'm not made of stone!" -Krusty the Clown
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post #10 of 16 Old 03-06-2009
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You don't really have to guess. Call Max Prop and if you give them the data they need (boat size, engine, reduction gear) they will tell you what your settings should be. I've done that on my last two boats and they were right on each time.

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