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FishinMaverick

prop size?

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FishinMaverick    0
FishinMaverick

does anybody know where i can find the correct prop size for my mercury. I have the serail number,but don't know where to look for the correct size. all help is appreciated!

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marine_man    1
marine_man

Quote:

where i can find the correct prop size


Prop size varies based on boat, load, engine hp, etc; so there's no one "right" prop for one given motor.

Are you trying to find out what prop size you have currently, or do you want to change prop sizes for performance reasons?

marine_man

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Tim Ellis    0
Tim Ellis

Maverick, I found this Mercury Prop Selecto website helpful. Here is the link: Mercury Prop Selector

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FishinMaverick    0
FishinMaverick

thx tim and marine man. The prop selector was useful. Now if i wanted to get on plane a little faster would i want to go down in pitch or up in pitch 13---->12 or 13---->14?

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rtwills    0
rtwills

down to improve hole shots, up for top end

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marine_man    1
marine_man

13 to 12.

The balancing act here though is that you don't want to overrev your motor at wide open throttle. You want good hole shot, and your WOT RPM's should be near the upper limit of your motor's RPM range.

marine_man

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mnfishman    0
mnfishman

Quote:

13 to 12.

The balancing act here though is that you don't want to overrev your motor at wide open throttle. You want good hole shot, and your WOT RPM's should be near the upper limit of your motor's RPM range.

marine_man


That is exactly right. Also if you over prop and start lugging the engine that is not good for outboards either. What you need to do is run your boat with a full load and see what the RPM's are. If you are already within the upper limit of your RPM range then you would not want to decrease your pitch from let's say a 13 to a 12. You would run the risk of over revving the engine and seeing things that you don't want to see in an outboard.

Each pitch change in a prop will usually drop or raise the engine RPM by 300 RPM's. I can't remember which way to go if you go from alum to stainless but I think you have to go down a pitch when you change to stainless.

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marine_man    1
marine_man

Quote:

I can't remember which way to go if you go from alum to stainless but I think you have to go down a pitch when you change to stainless.


When you switch to a stainless you typically need to drop a pitch as the stainless prop has more cupping.

marine_man

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