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Author Topic:   Composite Propeller
DW posted 02-14-2002 01:39 AM ET (US)   Profile for DW   Send Email to DW  
Hello all,
I Have been running with a 19P three blades, then alternating to a five blades stainless steel propellers on the 1991 17' Outrage equipped with a Mercury 115 outboard for the past year. Both seem to work well, but I do think the three blades work better. But after reading about the wear that SS propellers can cause on the lower unit, I have been thinking about changing to either an aluminium or composite prop.

The Piranha propellers were recommend in the Powerboat Report as a good choice, so I was wondering if anyone has any experience or recommendations on these composite props. As well, any recommendations on the best size?

Thank you in advance


kamml posted 02-14-2002 07:36 AM ET (US)     Profile for kamml  Send Email to kamml     
I had a 19.6 cuddy cabin Renkin a few years back with the a 175 Merc IO. I ran a 4 blade Comprop 21 pitch and had no problems at all. It would push the boat to about 43mph (gps). The Pirana were on sale at Cabella's bargin cave a couple of weeks back. Ken
Bigshot posted 02-14-2002 10:04 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
You have an 11 year old engine and you are worried about premature wear from SS props? I would say that that you have just dispelled that rumor with your engine. SS props do not cause wear on lower units. They can do more damage if you strike an object but my experience overall has been SS or nothing.
TightPenny posted 02-14-2002 10:49 AM ET (US)     Profile for TightPenny  Send Email to TightPenny     
Premature wear from a SS propeller?

I put an OMC SST (stainless steel teflon) propeller on my 1974 50hp Evinrude when I bought it new, because OMC guaranteed to replace the prop if I ever could find a way to break it.

I retired that engine in 1999 because the tilt pin had almost totally seized. There just was no way to lift the engine except by standing behind the boat and lifting from the skeg.

There was nothing else wrong with the engine. Oh yeah, I still have the prop.

grandmufti posted 02-14-2002 10:35 PM ET (US)     Profile for grandmufti  Send Email to grandmufti     
I used the 4 blade Comprop for several years and loved the performance it gave me.I finally gave up on them after blowing out the hubs on 2 different props while cruising.Each prop lasted about 1 year before it blew.

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