Custom 6 blade cleaver / Outboard

[CUSTOM PERFORMANCE 1]

Have any of you ever seen one of these? It was custom built by Wilson Performance Propellers in England. This one is 23 pitch. It is an absolute work of art. I am gonna run it on my fish boat to compare to a Barvo 1 that I run now.:)

[The Big Al]

That looks wicked!

[Bruster]

Have any of you ever seen one of these? It was custom built by Wilson Performance Propellers in England. This one is 23 pitch. It is an absolute work of art. I am gonna run it on my fish boat to compare to a Barvo 1 that I run now.:)

Looks like a Rolla that they run with the Arneson Surface drives on the big boats.:D

[150aintenuff]

does that come in a 28 or 30 P.....

[AirRide]

With that propeller. Mine looked the same as that one does. It was a brand-new Rolla 6-blade, over-the-hub exhaust(just like yours)at the time. Same old style, Mercury rubber, pressed-in hub. Mine was about a 26" pitch, maybe a little less. I slid it onto a brand-new 1987 Evinrude XP 300 V-8 from Second Effort(they were only 300 h.p.), which was bolted to a new 22' Apache Scout. On it's maiden voyage, I planed off normally for the first time & immediately notice an engine vibration while cruising slowly at about 30-35 m.p.h. I turned around & pulled the boat out of the water. The propshaft was bent. Got it replaced with another brand-new warranty lower-unit. Put the boat back in the water with the same propeller & the exact same thing happened again. Bent a second propshaft. This was my lessen from this: These propellers do not slip. They bite. A little too well, especially when you have a motor with some bottom end torque & a standard 1" propshaft. Be careful! AirRide

[imq707s]

I find it hard to believe that a 300hp motor is going to twist up a 1" steel shaft....but I could be wrong. Wouldn't it just bog the motor down??.....not twist the shaft up??

More info please. ;)

[Juggernaut]

yeah, that doesnt sound quite right... it might be because the torque of the engine just wont allow it to bog, but if that is the case,then it should just bite, and launch you forward. SICK PROP

[1BadAction]

hill said he makes a 7 blade and its better....

[imq707s]

I was doing some more thinking about "twisting the prop shaft". That just doesn't make sense.

Here is why I say that.......

I had a 1971 Camaro with a stock 8.5" chevy rearend that I used to drag race. I was running a pretty stout small block with a small 180hp shot of NOS on top of that. I was running 10.5" slicks on the car, and it would run low 11.1's in the 1/4........and the stock axles in that are were around 1.25" dia. and about 36" long. I never twisted an axle once........and I'm sure the motor was putting out way more power and TQ than any 2-stroke boat motor. And I'm also sure that a prop would slip more than the slicks did :D

[Wile E. Coyote]

you guys may be overlooking something, that is a HEAVY piece, it may not actually be the prop itself but rather the force required to get that much metal moving or up to speed, its been my experience that the more blades, the more horespower robbed/reqired to turn or achieve the performance advantage of the extra blade(s)

[150aintenuff]

stock cars can pretzle drive lines and axles given enough torque loading, that is what was happening to airride, torque loading not initial yeild loading... it does it over time.... heavier hulls make it worse as do small parts, didnt help in airdogs case that the OMC motor was known for propshaft failures...

[CLIMATEMASTER]

I can't count the number of axles I twisted off drag racing and four wheeling. First stock then Strange racing axles. If we didn't twist the axles we broke all the wheel studs. Or worse twisted the drive shaft that took out the exhaust when it ripped the tail shaft off the tranny.

Torque when mixed with excellent traction, or in this case no prop slip will tear up the weakest link every time.

[imq707s]

"I can't count the number of axles I twisted off drag racing and four wheeling. First stock then Strange racing axles. If we didn't twist the axles we broke all the wheel studs. Or worse twisted the drive shaft that took out the exhaust when it ripped the tail shaft off the tranny.

Torque when mixed with excellent traction, or in this case no prop slip will tear up the weakest link every time.
Yesterday 07:48 PM "



I agree......but you're talking about a 4-stroke V8 vs a 2-stroke motor.........what kind of torque numbers does an OMC V8 put out at low RPMS when you stab it coming out of the hole??? I don't even want to guess what a build V8 on the bottle is making....I'm sure there is no comparison.

[150aintenuff]

I can't count the number of axles I twisted off drag racing and four wheeling. First stock then Strange racing axles. If we didn't twist the axles we broke all the wheel studs. Or worse twisted the drive shaft that took out the exhaust when it ripped the tail shaft off the tranny.

Torque when mixed with excellent traction, or in this case no prop slip will tear up the weakest link every time.


exactlly......

imq707... weld a nut to a 1" propshaft and take a 6' breaker bar and see how easy it is to break....... you would be supprised..

[imq707s]

How easy it is to break the nut.....or twist the shaft?

If I'm doing my calculations right....if you hang a 200lb guy off of a 6' long breaker bar....that's 600 ft/lbs of TQ at the nut. That omc isn't putting out 600ft/lbs of TQ...I doubt it's even putting out 300.

I could be off on the numbers though.

[CLIMATEMASTER]

The propshaft was bent. Got it replaced with another brand-new warranty lower-unit. Put the boat back in the water with the same propeller & the exact same thing happened again. Bent a second propshaft. AirRide

Bent, not twisted, not broken.

I know when I had my Alpha one rebuilt and put behind a 400+hp 383 stroker, my mechanic said he didn't recommend a 4 blade much less a 5 blade. And if I did chose to run a 4 blade not to punch it out the hole. He said if I broke my drive running a 5 blade prop it had no warranty.

[150aintenuff]

300 ft lbs or more times 1.86:1 geer ratio... 600 ft lbs of force on shaft is easy....