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  #1  
Old 03-04-2014, 01:18 PM
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Default Semi Cleaver

I talked to Mr. Danny here and he'd mentioned Yamaha OEM black painted semi cleaver is a great prop in many applications. I'm running a 10.5 x 13p NREB and Stielleto Triad II. I read that I'd almost need to go up 2 pitches beings the props I'm running have moderate cup. So the smallest semi cleaver i can get is 10.25x14p, I'm just looking for some guys that know more about prop designs should I go with 14P or 15P?
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Old 03-04-2014, 01:39 PM
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Originally Posted by MattMigues View Post
I talked to Mr. Danny here and he'd mentioned Yamaha OEM black painted semi cleaver is a great prop in many applications. I'm running a 10.5 x 13p NREB and Stielleto Triad II. I read that I'd almost need to go up 2 pitches beings the props I'm running have moderate cup. So the smallest semi cleaver i can get is 10.25x14p, I'm just looking for some guys that know more about prop designs should I go with 14P or 15P?
almost all the prop manufacturers have sales service that will take your motor and boat info and give you the correct prop for your boat and be very close pitch wise. anytime you go with a new style prop you have to expect you may need to move up or down a pitch size from the standard recommendations.

tell em what you had and what you had in mind and maybe they have a better idea to get you the performance you are looking for.
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Old 03-04-2014, 06:08 PM
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I have the 14 pitch. What motor u runnin and what size boat?
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Old 03-04-2014, 08:03 PM
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Default Semi Cleaver

I have 50 tlr 2 stroke. 15.5ft custom aluminum built modified V
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  #5  
Old 03-04-2014, 09:04 PM
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ImageUploadedByTapatalk1393985041.545774.jpgImageUploadedByTapatalk1393985051.728928.jpg
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Old 03-04-2014, 09:11 PM
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14 would prolly run good on it.
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Old 03-05-2014, 07:10 AM
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14 on a stock 50 will turn right at 5700-5800. Sprinkle a little magic dust in that motor and it will turn that 14 about 6200. When I'm done porting a 50 Tohatsu, they normally turn a 15 pitch Yamaha 6200 loaded.. Tohatsu and Yamaha are not the same port mapping.
D
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Old 03-05-2014, 07:25 AM
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14 on a stock 50 will turn right at 5700-5800. Sprinkle a little magic dust in that motor and it will turn that 14 about 6200. When I'm done porting a 50 Tohatsu, they normally turn a 15 pitch Yamaha 6200 loaded.. Tohatsu and Yamaha are not the same port mapping.
D
Danny, how do these props run on a tunnel? Will I need to add some cup to it?
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Old 03-05-2014, 07:57 AM
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Danny, how do these props run on a tunnel? Will I need to add some cup to it?
Yes cup will be needed for a tunnel....the cleaver has little to no cup.
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Old 03-05-2014, 08:24 AM
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Yes cup will be needed for a tunnel....the cleaver has little to no cup.
I thought that they come with slight cupping? Correct? I can run my Round Ear Blades 3/4 trim 35-37 MPH at 5500-5700 RPM. With the semi cleaver I'm guessing that prop will run right once trim angle puts ventalation plate and keel parrarell? I would like to run one before i spend $360+ because every time I've asked someone about props Yamaha semi cleaver is mentioned.
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Old 03-05-2014, 12:00 PM
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Originally Posted by Top Dawg View Post
Danny, how do these props run on a tunnel? Will I need to add some cup to it?
VERY light cup. Not anywhere near as much cup as for a round ear prop. Semi cleavers are designed to run surfaced, so they hold extremely well in a high application, such as a tunnel. The fastest marsh tunnels I have set up run with Yamaha semi cleavers on them, they sacrifice no hole shot.
D
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Old 03-05-2014, 12:01 PM
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Thanks D
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  #13  
Old 03-05-2014, 01:18 PM
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Thanks D
X2 Mr. danny knows some stuff when it comes to rigging!
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  #14  
Old 03-05-2014, 01:19 PM
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X2 Mr. danny knows some stuff when it comes to rigging!
He is the daddy
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Old 03-08-2014, 10:28 PM
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Friend of mine let me borrow a 14p yamaha prop. I had 3 people 18 gallons of fuel 2 batteries and ran right around 5400rpm's. Good mid range and hole shot was pretty good also. It seems to be as fast or faster than my stiletto triad. I'm impressed to say the least.
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Old 03-09-2014, 07:34 AM
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You might experiment with raising the motor with the Yamaha prop, 1/4" at a time. The Yamaha blade material looks thin, but, I have one that is 20 years old and is used in the marsh every year. Yamaha uses some superior stainless to build that prop. Same props we used on our inflatable raceboats in 99 and 2000. We would buy 16 pitch Yammies and have them raised to 18 pitch props.
These are inflatable tunnel boats that weigh about 125 pounds, with tiller 50's on them. We had a co-pilot to act as trim, I had a 15 year old co-pilot that was fearless. He would sit on the transom down the straights and slide to the front to set the boat to turn. All I ran was Yamaha props pitched up.
D

Last edited by CajunChristian; 03-09-2014 at 07:53 AM.
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  #17  
Old 03-09-2014, 11:38 AM
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That some fast little boat!
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Old 03-09-2014, 12:07 PM
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That some fast little boat!
The motors were "stock" as defined by the rules.. Mine would run mid 60's. I propped the motor for that long start, the first guy to the turn usually has the race won unless someone has 5 mph on him.
D
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  #19  
Old 03-09-2014, 03:17 PM
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Gonna need cup on mine. Ran it today on the 18' tunnel and it slips with very little trim. Best I got was 36.8 on gps. Then try to get more trim and she'd slip
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Old 03-09-2014, 09:18 PM
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Gonna need cup on mine. Ran it today on the 18' tunnel and it slips with very little trim. Best I got was 36.8 on gps. Then try to get more trim and she'd slip

This one only got 5300 with just me in it full fuel and 2 batteries. I'm going to try to get the rpm up by raising it a little at a time. Top speed was 33.6 and any trim passed parallel with keel it wants to ventilate. But that said the overall performance is best this far I'm thinking picking it up 1/4-1/2" will get me running perfect.
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