My Hurth transmission has a drain, as well. Totally useless. In my stupidity, 
after having problems to suck out all of the old oil, I decided to use the 
drain. Opening it is not a big deal (an extra joint in the arm would certainly 
help). But putting that plug back in requires at least two extra joints or some 
help from a very little person (2-3 inches max). Suffice to say that it took me 
probably a good hour and a few choice words to put the plug back in. Note to 
all: don’t try it at home.

I am not overly surprised that some PO stripped the threads in the plug 
(probably in the transmission housing, because it is aluminium(?) and the plug 
is steel). He probably gave up after only 50 min.

Marek

From: Jim Watts via CnC-List
Sent: Tuesday, November 29, 2016 21:16
To: 1 CnC List
Cc: Jim Watts
Subject: Re: Stus-List Kanzaki transmission oil change

My Kanzaki gearbox has a drain. 3GM30F. I know because it cost me a lot of 
money to have the tranny pulled just so they could helicoil the drain plug that 
some prior idiot had stripped and "fixed" with goop. That was a very fortunate 
morning that I decided to check under the engine before a long passage and 
found a large puddle of clean oil. The drain plug is the hex head at the bottom 
of the transmission.

http://imgur.com/5ff77e95-9f86-47d1-8054-6b2e13e2e845


Jim Watts
Paradigm Shift
C&C 35 Mk III
Victoria, BC

On 29 November 2016 at 14:12, BillBinaList via CnC-List <[email protected]> 
wrote:

The manufacturer says single weight, either 20# or 30#. So, if you are in the 
Arctic circle, or somewhere so cold that heavier oil affects shifting or 
slippage, use straight 20#. Elsewhere, use straight 30#.

https://www.yanmar.com/media/global/com/product/marinepleasure/sailBoatPropulsion/operationmanualgears/outlineKM4A-2.pdf

Bill Bina

On 11/29/2016 4:50 PM, Josh Muckley via CnC-List wrote:
I've not come across this designator "SAE 20/30".  I've seen "SAE 30" and "SAE 
20" but never "SAE 20/30".  I believe the other listers are probably correct 
that it is designating one or the other.  Building on that assumption, if it 
makes life easier, you can use a multi weight oil since they are all the same 
viscosity at operating temperature.  A 5w30 or 10w30 will be fine.

http://themotoroilevaluator.com/members-blog/understanding-multi-viscosity-oils/#axzz4RR6Z4Xs2

Josh Muckley

S/V Sea Hawk

1989 C&C 37+

Solomons, MD

On Tue, Nov 29, 2016, 2:53 PM Persuasion37 via CnC-List <[email protected]> 
wrote:
I would suspect that you would use the right weight based on operating 
temperature.  Up here in the great white north you probably would use 20w.  As 
you move south into warmer temperatures you may want to use 30w.  Age could 
also play a factor.  Am I glad I use ATF😜


Mike
PERSUASION
C&C 37 K/CB
Long Sault

On Nov 29, 2016, at 1:14 PM, Joel Aronson via CnC-List <[email protected]> 
wrote:

Maek,

It means a single weight oil - either 20w or 30w, not a multi-weight such as 
10w-30.

Joel

On Tue, Nov 29, 2016 at 1:09 PM, Hoyt, Mike via CnC-List 
<[email protected]> wrote:


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