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Old    Damon Rocho (rochodl)      Join Date: Sep 2006       05-29-2007, 8:28 AM Reply   
I have a 2002 Supra Launch Direct Drive. Just dropped it in the water after having my prop refinished. Runs fine when traveling at slow speeds but when coming out of the hole it does not seem to be getting up to speed the way it normally did. Kind of feels and sounds like it is spinning out like you would in a truck with the back tires spinning. The rpms are way up but the boat is not going as fast as it should. Any help would be greatly appreciated.
Old    Craig (yosquire)      Join Date: Jun 2005       05-29-2007, 8:48 AM Reply   
Are you sure you installed the keyway?
Old    Flux (flux)      Join Date: Jun 2003       05-29-2007, 8:49 AM Reply   
Sounds like they messed with the pitch.
Old    Damon Rocho (rochodl)      Join Date: Sep 2006       05-29-2007, 9:48 AM Reply   
the keyway ??
Old    Craig (yosquire)      Join Date: Jun 2005       05-29-2007, 9:56 AM Reply   
The keyway is a small square piece of metal stock. it's square, about 1/4" x 1/4". It keeps the prop from spinning on the shaft.

Here's the slot that the keyway sits down inside:
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Keyway looks something like this.
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Old    Dirty D (dkjbama92mariah)      Join Date: Dec 2005       05-29-2007, 9:58 AM Reply   
The slot is the keyway; the metal bar is the key.
Old    Damon Rocho (rochodl)      Join Date: Sep 2006       05-29-2007, 10:03 AM Reply   
I will check that out today !! Thank you soooo much for the help everyone.

If the keyway is installed what else should I check for ??
Old    Flux (flux)      Join Date: Jun 2003       05-29-2007, 10:14 AM Reply   
If all you did was have the prop redone than it's either the key, or they put a different pitch on the prop when you had it reworked.

Who installed it afterwards??
Old    Damon Rocho (rochodl)      Join Date: Sep 2006       05-29-2007, 10:19 AM Reply   
My Buddy B-Dog did !! Not sure he knows what he is doing !
Old    ejojprop            05-29-2007, 1:06 PM Reply   
Could be some of the cup was removed in the repair process. This will cause the propeller to feel like it has no "bite" and run high RPM with a reduction of speed.
Old    Chad Martin (lightningstrikes)      Join Date: May 2007       05-30-2007, 4:56 AM Reply   
If I had to guess I would agree that the key is the problem. It is actually called a woodruff key, and it is very important you don't just buy any key. You should use the correct one for a propeller shaft...it is able to shear down the centerline in case of a prop collision, thus allowing the prop to stop and take the damage rather than the shaft, drive, gears, etc. If you use a standard key from a hardware store, and your prop has a collision, the damage to the drive system can be very expensive if the key does not shear.
Old    Damon Rocho (rochodl)      Join Date: Sep 2006       05-30-2007, 6:03 AM Reply   
Hey guys,

Thanks so much for taking the time to provide me with some insight. I am going to check these things out today. 90 and sunny in Michigan today so I want to get out on the lake and board a little.

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