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Author Topic:   Comprop
compounder posted 05-14-2001 10:07 AM ET (US)   Profile for compounder   Send Email to compounder  
I'm seriously considering one of these composite props, primarily to carry as a spare. The low price and relatively low weight seems to make it to right choice.
Anyone have any experiences with these to relate? Know where to buy one for less than the $83.00 Overton's wants?


Whaletosh posted 05-14-2001 03:19 PM ET (US)     Profile for Whaletosh    
I have LOTS of experience with Comprop. I used them as my primary prop on 2 different boats. The performance was better then the stock aluminum props that came with the boats.

As far as being relegated as a spare here are the advantages:

1) They are light, which makes handling them in emergencies easier.

2) Being synthetic composite they won't cause galvanic corrosion. so they can be kept clean and grease free until needng to be deployed.

3) They are less expensive, so one can have a inexpensive spare without sacrfiicing safety.

Are ther disadvantages? Yes:

1) They shouldn't be used on boats that are longer than 21' or weigh more than 3000 lbs (single drive) or on motors exceeding 225 HP.

2) People will tellyou are crazy for relying on a hunk of plastic.

My experiance has been very positive. I never had a failure. I replaced one because I foolishly wasn't looking. The prop did just what Comprop said it would do. The blades broke off, leaving me stubs that were enough to get me back to the dock at slow speed. I just bought another prop for $65.

I will be getting a Comprop to keep as a spare for my Dauntless 14. I plan on treating myself to stainless prop with this boat; but the spare is going to be a Comprop.

whalernut posted 05-14-2001 04:02 PM ET (US)     Profile for whalernut  Send Email to whalernut     
Do you use the same pitch comprop as the 3 blade aluminum? Regards-Jack Graner
Whaletosh posted 05-14-2001 05:02 PM ET (US)     Profile for Whaletosh    

Comprop says to use the same pitch. But the general rule of thumb is to go down 1" in pitch when switching from a 3 balde to 4 blade prop. Comprops may not need to worry about this because having less mass means they have less inertia to overcome; meaning they are are easier to get spinning or to increase speed.

Personally, I have always gotten the same pitch or the one just below my current prop.

P.S. comprop doesn't have as much variety in diameter/pitch as other makes.

lhg posted 05-14-2001 05:13 PM ET (US)     Profile for lhg    
The Comprop blades flex into less pitch under load and acceleration. Aluminum does this somewhat less, also. SS doesn't give much.

Sean, for the new Mercury 60hp 4 stroke, treat yourself to Merc's new 4 bladed Trophy Sport prop.

RFK posted 05-14-2001 11:57 PM ET (US)     Profile for RFK  Send Email to RFK     
I used a Comprop on a 90hp Johnson. 4 blade, 131/4x17. Worked great. Had the thing almost two seasons before the Loch Ness monster took it. Even when I hit something, the damage was even on the four blades and it was just a slow ride home.
Whaletosh posted 05-16-2001 09:23 AM ET (US)     Profile for Whaletosh    

The Trophy Sport is the prop that I was also thinking of; just forgot the name. I just need to get the proper pitch. Maybe I should e-mail Whaler.

My dealer's father has a Montauk with a Mercury 4-stroke 50 HP on it. They tried the Trophy Sport on it and they really like the performance.

I already have a Comprop that fits and will make a great spare prop.

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