[C38] 5424 Transmission model

[Max Soto]

Thanks for all the info.

Finally the tranmission is out of the boat. Following an old advise from
Tom, I just went into the sail locker. Spent two days removing the
bellhousing screws. They were kind of  welded!!!, the  tranmission shaft was
stuck with the plate. We were pulling it with some ellastic feeling. we were
able to open the housing less than 1/2", so we installed larger screws with
nuts in between and started rotating them. Finally the plate rivets gave up
and we got it out. Then,  removed the rest of the plate from the shaft and
from the engine, took it to a shop, and they return it like new. I'm going
to disassemble the trany today, so I'll let you know how it goes.

Max Soto
C38 #198
Puntarenas, Costa Rica



2007/5/2, Tom T. <tdtron at earthlink.net>:
>
>  As a side note, transmissions and differentials will use a gear ratio
> that will not be an even ratio so that the gears will always mesh with a
> different position on each revolution.  This makes the gears wear evenly
> instead of possibly some gears wearing more than others and then causing a
> hum or vibration.  With an even ratio, any gear with a flaw would keep
> hammering that flaw into the same spot on the opposing gear.  With an odd
> ratio, the flaw will hit every tooth on the opposing gear making even wear.
>
> On a differential, the pinion gear will never have a number of teeth that
> will evenly divide into the number of ring gear teeth.  Transmission gears
> work on the same logic.  When a transmission is referred to as a "2-1"
> ratio, they are using round numbers and are not using literal numbers.   A
> 1.85-1 could easily be called a "2-1" ratio for simplicity, even if
> incorrect.
>
> Tom T.
> Renata hull # 95
> St. Pete, Fla
>
>
>
> ----- Original Message -----
> *From:* John Erlandson <jserlandson at adelphia.net>
> *To: *Catalina 38 Listserve <listserve at catalina38.org>
> *Sent:* 5/2/2007 1:47:40 PM
> *Subject:* Re: [C38] 5424 Transmission model
>
>
> I replaced my transmission a couple of years ago. It had a HBW100 and I
> replaced it with a ZF10M which is the updated model # I will have to check
> what the gear ratio was.
> John-
>
>
> ----- Original Message -----
> *From:* Max Soto <maxsoto at gmail.com>
> *To:* Catalina 38 Listserve <listserve at catalina38.org>
> *Sent:* Friday, April 20, 2007 4:37 PM
> *Subject:* [C38] 5424 Transmission model
>
>
>
>
> Hi everybody,
>
> The list has been very quiet lately!!
>
> I'm planning to pull out my transmission this weekend. Im going to try to
> rebuilt it.
> The tag is gone so I'm not sure which model is it. I have a 1982 24hp
> Universal 5424 with a HURTH tranmission.
> The manual says is a HBW 10, but I heard that is really a HBW 100.
>
> Do any of you guys with this engines know the right model??
> I know the ratio is supposed to be 2:1, but is really 1.85:1. I'm I
> right??
>
> I'll appreciate your help.
>
> Max Soto
> C38 #198 Estancia
> Puntarenas, Costa Rica
>
>
>
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>
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