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post #1 of 7 Old 10-07-2019 Thread Starter
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Yanmar 2QM15

Hello,
I am wondering if anyone out there is parting out a 2QM15 transmission. I'm looking for a transmission flange/gearbox bellhousing or mounting flange as Yanmar call it. Part # is 177080-02030. I bought a 2QM20 KBW10 transmission thinking it would bolt straight on but the 15 hp engine has a specific flange (but shares KBW10 gear). I would be grateful if anyone who has one available at a reasonable price could get in touch. Thanks.
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post #2 of 7 Old 10-07-2019
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Re: Yanmar 2QM15

Sounds odd. What's different between the two? Is it the bolt pattern to the bell housing?

My concern would be over the gear reduction ratio, if it doesn't fit properly. Gear models are made with various reduction ratios from engine to prop rpm. Perhaps the mounting pattern differs between them too, so they wouldn't be interchanged?


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post #3 of 7 Old 10-07-2019 Thread Starter
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Re: Yanmar 2QM15

Nothing odd about it. They are just different. QM series (2QM15,2QM20 and 3QM30) has two different gearboxes (KBW10 and KH18) and three different transmission flanges. Reduction 2.14:1 for memory.
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post #4 of 7 Old 10-07-2019
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Re: Yanmar 2QM15

Probably plenty of them out there, but for you needing it sooner than later, might make sense to have a machine shop fab one for you.

Many, many small boats taken out the last couple of years in usa hurricanes..but how to source the used parts is not estabished and organized
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post #5 of 7 Old 10-07-2019
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Re: Yanmar 2QM15

I'm saying it would be odd for ZF hurth to change the identical transmission (unless it's not actually identical, such as gear ratios beinf diiferent for the two diff engines). What exactly is different? The bolt pattern?


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Re: Yanmar 2QM15

Yes bolt pattern and physical size/diameter is different.
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post #7 of 7 Old 10-08-2019
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Re: Yanmar 2QM15

You sure the rest is the same: engine spline, shaft coupler, input/output offsets? If the physical size is different, it may be more of an issue than just mounting it.


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