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Discussion Starter #1
hello everyone, i got a boat from an auction and it did not have a prop on it. so what i need is for someone to tell me a good prop to go with. i would like to go with a stainless one. so here is what i have and hopefully you will be able to guide me in the right direction. thank you


1988 miller 21' open bow lowrider ski boat
97' 5.7 vortec w/ holley 750 vac sec motor basicly stock roller
omc cobra outdrive

i would like a all around prop for pulling skiers and hauling ass across the lake..
 

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Try a 21" 3 blade bow lifting prop first, or for more top speed a 23 may be better. This assumes that you don't have a high altitude drive ratio. Make sure its 1.5 to 1. Dump the 750 vacuum carb and go to either a 750 marine Edelbrock or Holley marine double pumper. You'll have better punch, higher top speed and you won't have to replace the secondary diaphragm when it gets hard and won't open the secondaries fully, at least once a year. As a matter of fact even a 454 I/O will seldom be able to fully open the secondaries with a vacuum 750. Look at the chart in the Holley catalogue. TIMINATOR
 

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Discussion Starter #3
i have a 14 1/2 x18 pitch 4 blade alumi on ther now. should i go up to a 22 or start with like a 20? and should i go with a 3 or 4 blade. iam clueless when it come to props.
 

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In a 3 blade I would go with 15-15 1/2 with a 21 pitch. 4 blade the same and in a 5 blade maybe a 19 pitch. I am thinking that will get you about 4600 to4800 rpm.
 

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Discussion Starter #6
is the 4 blade 18p to much for it right now.when i got the boat it did not run and the 3 blade 15x15p prop that was on it was all messed up so i put the 14.5x18p 4 blade on there.
 
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