[C320-list] Kiwi Feathering Prop

[Kirk McCullough]

Warren

All good points.

My H50 had already been rebuilt once, so I didn't want to go that way again.
The H100 is 7/8" longer. I replaced my old bronze shaft at the same time
with a shorter SS shaft. I was advised that the longer shaft would do well
but I wanted to replace it anyway. The shaft was about only about $300 from
a well know marine machine shop in Vancouver. A new bushing for the strut
and I'm in good shape.

There is actually a much longer story behind ZF and how they handled my
purchase, which was for another new H50. The new H50 lasted 30 minutes. ZF
flew in an H100 for free, did the install and even reimbursed my mechanic
for time he spent trouble shooting the failed H50. They did all this a no
cost to me and no questions asked. So I got a new H100 which I feel very
good about, for the price of an H50. I think they were aware of the new H50
would not do the job and didn't squabble at all.

Kirk
#124



-----Original Message-----
From: c320-list-bounces at catalina320.com
[mailto:c320-list-bounces at catalina320.com] On Behalf Of Warren Updike
Sent: 30 November 2007 10:48
To: c320-list at catalina320.com
Subject: Re: [C320-list] Kiwi Feathering Prop

Kirk, I too was pitched the HB-100 to replace the HB-50 on my Perkins
engine.  While I do believe this is a good recommendation, it is about one
inch longer, fore&aft, than the 50.  Technically, this means the shaft
should be removed and shortened, someting I was not interested in doing at
the time.  The space between the propeller and the shaft strut should not
exceed 1.5 X shaft dia.; or, 1-1/2 inch.  Should you exceed this, more
vibration and greater bearing wear may result.  One would need the services
of a good machine shop to shorten the shaft and realign the facing plate
with the shaft.  

I have a bronze shaft.  It has a grove worn in it from overtightening the
packing nut and failure to renew the packing material (credit the PO.)
Therefore, were I to pull the shaft I would want to replace it with a SS
shaft and flexible coupling adding another 5 to 6 boat units to the job, on
top of the approx. 1,500BU(??) for a new HB-100.  I stuck with my bronze
shaft and rebuilt the HB-50 for about half the cost of a new trans.

Warren & Pattie Updike
C320, #62, 1994, "Warr De Mar"
Frog Mortar Creek, Middle River
Chesapeake Bay