[C320-list] prop install

[Jeff Church]

Stan,

I spoke to the DriveSaver folks, Globe Composite Solutions, and they do not 
recommend installing their product unless you maintain a certain maximum 
distance between the prop shaft strut and the hub of the prop. Their 
recommendation for our 1" shaft is that the distance be no more than 1" to 
1.5".  According to them, with a marine brass shaft instead of SS, the spec 
is even more critical. The gap is already 1.25" on my boat and the 
DriveSaver would bump that up to 2.5".  Assuming the gap on my boat is 
typical, Bob and Russ would have to pull the shaft and have the inboard end 
cut and the keyway machined in order to properly install the DriveSaver.

JeffC


----- Original Message ----- 
From: "Stanley Rogacevicz" <SROGACEV at holycross.edu>
To: <C320-List at catalina320.com>
Sent: Monday, March 27, 2006 6:55 AM
Subject: Re: [C320-list] prop install


   Another option to assure prop-strut clearance is the installation of a 
"Drive Saver". It is a metal re-enforced fiberglass donut that installs 
between the flanges of the transmission tail shaft and the prop shaft. The 
original design intent is to take the shock of hitting a hard immovable 
object  with your spinning prop but still maintain the mechanical link of 
trans to prop shaft to limp home with. Although it is highly unlikely such 
an object will get by either the keel or rudder to your prop I installed to 
push the shaft back an inch. They also market it as a vibration dampener but 
I've never heard anyone agree with that claim.
    By the way... the grinding of a crescent notch into the strut for 
clearance has been approved  by Catalina according to someone's posting a 
year or two ago.
Stan
(formerly) Christy Leigh
c320 #656
Wickford/Narragansett Bay RI