Swapping Props |
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*mtrbtr* ![]() Senior Member ![]() ![]() Joined: October-30-2012 Location: Manhattan, MT Status: Offline Points: 173 |
![]() ![]() ![]() ![]() ![]() Posted: July-01-2015 at 11:29am |
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I have a 97 Sport with the GT 40. One of the reasons I have this boat is because it is such a great "do everything" boat. I am more of a skier and have been just starting to barefoot.
But in MT we have such a short season that we try enjoy all of the watersports. Its nice to surf on a windy day and lots of my friends wake board. I have both the ACME 1868 prop (12.5 x 14.25) and a 422 (12.5 x 15.5) I love the 1868 for hole shot and heavy loads, but it really screams when you slalom and top speed is about 37-38 at our elevation. The 422 runs really nice for faster sports but I always feel like the boat is really lugging with a lot of weight when we surf. (Could just be in my head). Is it hard on the engine to be switching props back and forth? Does the engine get "used" to being run a certain way? I had heard that some where and wondered if there was any truth to it. Was curious to hear all of your opinions. |
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2006 SV 211 (sold) went to the dark side
97 Sport Nautique (sold) 89 PS 190 (sold) 05 Four Winns H180 (sold) 89 Four Winns 180 Freedom (sold) 75 MFG (sold) |
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GottaSki ![]() Grand Poobah ![]() Joined: April-21-2005 Location: NE CT Status: Offline Points: 3355 |
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Its just metal and plastic and silicon man.
The soul of the machine is just a projection of our human condition. |
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"There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing."
River Rat to Mole |
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*mtrbtr* ![]() Senior Member ![]() ![]() Joined: October-30-2012 Location: Manhattan, MT Status: Offline Points: 173 |
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"The soul of the machine is just a projection of our human condition. "
Ha ha than my boat is pretty messed up! |
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2006 SV 211 (sold) went to the dark side
97 Sport Nautique (sold) 89 PS 190 (sold) 05 Four Winns H180 (sold) 89 Four Winns 180 Freedom (sold) 75 MFG (sold) |
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a0128 ![]() Senior Member ![]() ![]() Joined: May-05-2014 Location: Oregon Status: Offline Points: 226 |
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Have you tried the 654? It's right in the middle of the two props you mention. Diameter is the same (12.5"), pitch is 15". It might be a good compromise.
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Hollywood ![]() Moderator Group ![]() ![]() Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13513 |
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*mtrbtr* ![]() Senior Member ![]() ![]() Joined: October-30-2012 Location: Manhattan, MT Status: Offline Points: 173 |
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I'm familiar with the 654. That one looks reworked. Who reworked it and is it to spec?
Might be interested. Still curious is swapping props back and forth has any affect on the engine life etc. |
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2006 SV 211 (sold) went to the dark side
97 Sport Nautique (sold) 89 PS 190 (sold) 05 Four Winns H180 (sold) 89 Four Winns 180 Freedom (sold) 75 MFG (sold) |
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Hollywood ![]() Moderator Group ![]() ![]() Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13513 |
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If it wasn't to spec I wouldn't sell it here.
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*mtrbtr* ![]() Senior Member ![]() ![]() Joined: October-30-2012 Location: Manhattan, MT Status: Offline Points: 173 |
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Good point
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2006 SV 211 (sold) went to the dark side
97 Sport Nautique (sold) 89 PS 190 (sold) 05 Four Winns H180 (sold) 89 Four Winns 180 Freedom (sold) 75 MFG (sold) |
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gun-driver ![]() Grand Poobah ![]() Joined: July-18-2008 Location: Pittsburgh, Pa Status: Offline Points: 4127 |
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No the engine doesn't know or care what it's pushing. It's going to put out what it has no matter what's on the other end. That being said it's probably easier on the motor to be under propped then over propped. These motors will run 5 grand all day long but I wouldn't want to push a prop all day that puts a big strain on the motor through out the RPM range. |
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Jonny Quest ![]() Grand Poobah ![]() ![]() Joined: August-20-2013 Location: Utah--via Texas Status: Offline Points: 2937 |
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+1 I run the Acme 654 and I'm at 4,200 feet elevation. Great prop for my '94 Ski Nautique with 351W High Output. JQ |
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Current
2003 Ski Nautique 206 Limited Previous 2001 Ski Nautique Open Bow 1994 Ski Nautique Open Bow Aqua skiing, ergo sum |
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a0128 ![]() Senior Member ![]() ![]() Joined: May-05-2014 Location: Oregon Status: Offline Points: 226 |
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I also run the 654 (which is why I recommended it). It is a great all-around prop. For reference my Pro Air (GT-40) runs 30.5 mph @ 3100 rpm. Wake board speeds are roughly 22 mph @ 2700 rpm. No idea what RPMs WOT is. |
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*mtrbtr* ![]() Senior Member ![]() ![]() Joined: October-30-2012 Location: Manhattan, MT Status: Offline Points: 173 |
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JQ where are you at WOT?
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2006 SV 211 (sold) went to the dark side
97 Sport Nautique (sold) 89 PS 190 (sold) 05 Four Winns H180 (sold) 89 Four Winns 180 Freedom (sold) 75 MFG (sold) |
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Jonny Quest ![]() Grand Poobah ![]() ![]() Joined: August-20-2013 Location: Utah--via Texas Status: Offline Points: 2937 |
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OK, Sparky, here's the deal: 4,200 feet 3 people in boat 43 MPH 4,800 RPMs at W-O-T (I ran this last Saturday) |
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Current
2003 Ski Nautique 206 Limited Previous 2001 Ski Nautique Open Bow 1994 Ski Nautique Open Bow Aqua skiing, ergo sum |
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*mtrbtr* ![]() Senior Member ![]() ![]() Joined: October-30-2012 Location: Manhattan, MT Status: Offline Points: 173 |
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Thanks,
You are close to my elevation so I was curious to compare. |
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2006 SV 211 (sold) went to the dark side
97 Sport Nautique (sold) 89 PS 190 (sold) 05 Four Winns H180 (sold) 89 Four Winns 180 Freedom (sold) 75 MFG (sold) |
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