[C320-list] Engine noise

[Kirk McCullough]

Hi Warren

The ZF 10 is really the right gearbox for the Perkins or any other 30hp 
engine. The rebuild on my Hurth 50 was to include a new clutch pack, seals, 
gaskets etc plus any unknowns would be on top. I had heard that the shop i 
went to would be expensive but didn't have much choice.

The new ZF 6 was, $1250.00 installed. Then the ZF 10 was installed for the 
same price. The hours start over at zero on a new gear box. ZF even 
reimbursed my mechanic's time he spent installing and removing the ZF 6. 
This company understands the meaning of customer satisfaction. I went from 
thinking their product was crap (ie failed ZF 6) to recommending them to 
everyone on the dock. There are lots of older C30's on my dock with the 
Hurth 50.

I have a SS shaft, PSS dripless seal and Kiwi prop .

Kirk

Boomerang #124


----- Original Message ----- 
From: "Warren Updike" <wupdike at hotmail.com>
To: <c320-list at catalina320.com>
Sent: Thursday, July 19, 2007 10:02 AM
Subject: Re: [C320-list] Engine noise


I had my Hurth 50 rebuilt for less than $700 at a local Perkins authorized 
transmission shop (Annapolis, MD.)  With 1,000 hrs, it had a leak that was 
annoying to deal with.  They seem to have done a fine job on it including 
repainting the box.  They are American Marine Transmission in Mayo, MD; and, 
they are usually at the Annapolis Boat Show.

To their credit, Foley Transmissions suggested replacing the HB50 with an 
HB100 or ZF10.  They said that the HB50 is marginal for the application.  I 
was tempted; but, the additional cost and the cost of pulling and trimming 
the shaft was not appealing.  If I were to pull the shaft, I'd probably 
replace it with a SS shaft.

Another reason for not twiddling with the shaft is that the coupling is now 
perfectly aligned.  The error in my shaft alignment is only 1/1000 inch.  I 
don't like to fool with success.

Bottom line, for someone in the Annapolis area, I would recommend American 
Marine Transmission.  Shipping the thing wouldn't be simple.

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



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