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Author Topic:   Prop Materials (carry over from other area)
Whaletosh posted 11-06-2000 04:38 PM ET (US)   Profile for Whaletosh  
I have used Comprops on several boats. The perfromance is usually equal to or better than aluminum. The baldes break off if you hit something hard, saving you motor. Even if you want the performance of SS, Comprops are good for spares. They are light, cheap, and won't ding you boat as readily as Aluminum or SS. West Marine, Cabelas, Bass Pro, and Boat/US all carry them.
B Bear posted 11-06-2000 05:36 PM ET (US)     Profile for B Bear  Send Email to B Bear     
Are Comprops, those made of a compsition plastic or resin? I had only see one before when I was on a ship in Guam and the Steward hit some coral and busted the blades to nubins. The Chief Mate (fisherman out of Cape May when he was not sailing) was not too happy and told me that he did not like those kinds of props. It has been awhile since then and I really can't remember what he said the down side to those were. I will take a better look at them.
Barry posted 11-06-2000 09:51 PM ET (US)     Profile for Barry  Send Email to Barry     
Check out this site . Ship Shape TV did a show on propellers a little while back and one segment was on Piranha props. They did some impressive demos, running a boat over a large piece of timber, shearing all of the blades. They just pulled the prop, replaced the blades, and did it again.
Barry posted 11-06-2000 09:53 PM ET (US)     Profile for Barry  Send Email to Barry
Whaletosh posted 11-08-2000 08:46 AM ET (US)     Profile for Whaletosh    
Comprops are composites. Ditto for Piranhas. Piranhas have replaceable blades. As far as the blades breaking upon hitting the coral, that is what is supposed to happen. The blades break absorbing the impact of the strike instead of the lower unit or power head. On Piranhas you you just replace the blades, on Comprops you replace the whole prop. Usually the broken blades are enought to get you back in.

One other advantage, electrolysis (sp) is not a problem with Comprops, as they contain no metal. Piranhas have an aluminum hub. Proper maintenance should eliminate this problem however.

Comprops are really pretty inexpensive. I checked BassPro and Cabelas, the Mercury versions run $53 to $83. Even if you prefer stainless props these props are perfect for spares. They do have some weight and horsepower limits on them. Check for more info:

Note to B Bear you Honda 90 will accept the same props as Mercury 90s

B Bear posted 11-14-2000 10:42 AM ET (US)     Profile for B Bear  Send Email to B Bear     
Thank you all for the advice and help. The comp props sound like a good choice for exploring on the rivers.

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