Kanzaki transmission problem

GorillaToast

GorillaToast

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Sep 2, 2011
1,041
Hunter 27 Cherubini Alum Creek State Park
i have this posted in Maine Sail's forum, but I think I might get more responses here.

10 yr old Yanmar 1Gm10 w/ Kanzaki KM2P transmission. (Refurbished)

Cone clutch is glazed, and I know I'm in for a rebuild over the winter, but just trying to make it through the rest of the season (mid-November). An old salt suggested I try draining the oil and putting in kerosene or acetone to de-glaze it.

Does this sound dangerous to anyone, or has anyone tried it with success?

Thanks
 
woodster

woodster

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Sep 15, 2009
6,243
S2 9.2a Fairhope Al
i would not run that thing with either of those...maybe he meant flush it out a couple of times and then reload new oil
 
Davidasailor26

Davidasailor26

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May 17, 2004
5,691
Beneteau Oceanis 37 Havre de Grace
Pasting in my response from the other thread in case anyone stumbles across this thread in the future -

Works with diesel for Hurth transmissions. Hurth on the phone many years ago recommended to drain all transmission fluid, replace with diesel, run for about an hour in a mix of gears, drain diesel and replace with transmission fluid.
 
Charles Erwin

Charles Erwin

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Jan 30, 2012
1,144
Nor'Sea 27 "Kiwanda" Portland/ Anacortes
Are you sure that your conclusion - the cone(s) are glazed - is for sure? Have you ruled out a linkage/cable hangup?

In the case of Kanzaki gear boxes - if you have separate throttle and gear change (two lever) controls you need to remember the two lever arrangement is not reliable without regular adjustment, careful cable routing, and constant cable friction monitoring. Less so with single lever but still something you need to consider.

If you are certain about your diagnosis then realize that it is simple to remove/disassemble/fix and so obtain a reliable result. Much better and surely more reliable than chemical experiments which are rarely successful. These are not Hurth/ATF type designs.

Charles
 
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Ken13559

Ken13559

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Oct 29, 2005
2,362
Hunter Marine 326 303 Singapore
Without taking out the gearbox, how would one know the cone is glazed? And what is the symptom of glazed cone? I've KiwiProp and I've to, almost always click gear to forward before going reverse like heavy ropes around prop. If not the gearbox would load the engine very severely. Initially I thought it was the feathering prop problem but now I'm beginning to think its the kanzaki gearbox. So I this glazed cone symptoms?
 
GorillaToast

GorillaToast

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Sep 2, 2011
1,041
Hunter 27 Cherubini Alum Creek State Park
Well, I drained the transmission oil and put in the proper amount of diesel fuel. Then I went out on the lake and ran at near WOT for 2 hrs. Today I drained the diesel and put in 340ml of the same oil the engine uses. Then I took the boat out on the lake to test it.

Granted, the test conditions weren't perfect ( 15 kts gusting to 24 with 3ft swells) but I was able to get 6+ kts ddw, and 5+ crashing into the waves.

That'll get me in and out of the marina until haul out day!
Thanks for the helpful replies.
 
Ken13559

Ken13559

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Oct 29, 2005
2,362
Hunter Marine 326 303 Singapore
can anyone tell me what cone glaze symptom is?
is it slippages?
 
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