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Author Topic:   Piranha composite propeller
Robob2003 posted 08-03-2004 11:16 AM ET (US)   Profile for Robob2003   Send Email to Robob2003  
Anybody have experience with this or other replaceable blade units?

Want to re-prop a 100HP Johnson.

Thanks in advance,

Bob on Tampa Bay

Bigshot posted 08-03-2004 11:23 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
PLEASE do not do it....keep the prop you have. If you want to swap, I have a composite 17" 4 blade for me....keep your prop.
Hoosier posted 08-03-2004 12:33 PM ET (US)     Profile for Hoosier  Send Email to Hoosier     
That's all I use. I tend to take my boat into places where I'd be better off walking (wading?). I've averaged a blade a season due to lots of rocks where I boat and the exteme low water lavels in the Great Lakes the past few years. If you don't want to GO FAST they're fine. If you want performance, then you won't like them.
mikeyairtime posted 08-03-2004 01:01 PM ET (US)     Profile for mikeyairtime    
I just bought a Michigan Match aluminum prop for my 170 Montauk (13x19) to use in the shallow waters of the Colorado River. I did it for the same reason as Hoosier, because touching bottom is a likely possibility and I didn't want to destroy my stainless prop / gear case. I did a little research on composites and decided on aluminum because I'm going to need every bit of omph I can get to pull water skiers with a 90 horse. Also I heard Merc. makes a composite but recomends it only as a spare, which further convinced me to go aluminum. Composites have come a long way though, but to get the rigidity of stainless they'd probably end up costing more than stainless (carbon fiber). I'm still planning on using my stainless prop. for everything else.
Robob2003 posted 08-03-2004 05:59 PM ET (US)     Profile for Robob2003  Send Email to Robob2003     

I appreciate the composite prop comments. I won't go that route, now I may not need to do anything with the prop.

I talked with General Propeller today and think my problem is that when I had the tach installed I set it at "4" thinking it was the number of cylinders. It's marked "P" and 2, 4 and 6.

Now that my brain seems to be in gear I realize it was the pulse rate from the stator and rectifier which has to be at "6."

Hopefully I will get to take it out tomorrow before the rain comes to check it out.

Old and slow to learn:-(

Bob on Tampa Bay

JohnJ80 posted 08-07-2004 09:53 PM ET (US)     Profile for JohnJ80  Send Email to JohnJ80     
In point of fact, when I talked to the piranha guys a while ago, they told me their primary market is charter and rental boats. I think they have a set up where you can change a single blade out on a prop. perfect for rental companies and the knuckleheads that they must surely run across.


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