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Posting a reply to: Re: Tuffy E Mag question

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[QUOTE]VMS - 6/15/2020  4:48 PM

Looking at props,

the mercury spitfire 4 blade in a 14 x 12 might not be a bad option to consider trying.  This is a 4 blade prop which I believe should still give you good holeshot, and it should hold the boat up better overall as it is steel.  The 4th blade would help with bite, and going down in pitch while going up in diameter will help as well.

This is a rough estimate and is by no means going to be perfect, but I would think this would be close in RPM's for you.   Going to a 14" diameter, you would be losing about 200 RPM, Going steel, another 200 RPM and going to a 4th blade another 200 RPM.  BUT...going down in pitch by 3" should be roughly about 600 RPM's back up, so your top end should be fairly close.   I believe this prop has a little better blade design than the vengeance 3 blade as that is basically a black max prop made of steel...a standard prop without much more to it other than to be decent for an all around prop with more durability than the black max.

Steve[/QUOTE]

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VMS

Posted 6/15/2020 4:48 PM (#961339 - in reply to #956143)
Subject: Re: Tuffy E Mag question

Posts: 3476

Location: Elk River, Minnesota

Looking at props,

the mercury spitfire 4 blade in a 14 x 12 might not be a bad option to consider trying. This is a 4 blade prop which I believe should still give you good holeshot, and it should hold the boat up better overall as it is steel. The 4th blade would help with bite, and going down in pitch while going up in diameter will help as well.

This is a rough estimate and is by no means going to be perfect, but I would think this would be close in RPM's for you. Going to a 14" diameter, you would be losing about 200 RPM, Going steel, another 200 RPM and going to a 4th blade another 200 RPM. BUT...going down in pitch by 3" should be roughly about 600 RPM's back up, so your top end should be fairly close. I believe this prop has a little better blade design than the vengeance 3 blade as that is basically a black max prop made of steel...a standard prop without much more to it other than to be decent for an all around prop with more durability than the black max.

Steve