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MMI K27 coupler

4259 Views 6 Replies 4 Participants Last post by  railgeek
I tried a Kadee #5 and the amount of shim work seemed a bit excessive to me.....is there a coupler someone recommends for the MMI locomotives?  I'm pulling Bachmann rolling stock and soon fingers crossed some AMS/Accucraft cars.  Thoughts?
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Is this a first?  Did I stump everyone with a simple "which coupler to use?" question....not likely.  Then I can assume no one purchased an MMI locomotive?  K-27, K-28  .....?   I know someone has an answer out there.....ante up.
Mark, I think Dwight Ennis has one (?) He may be able to help. I only have the BLI C-16s and a Bachman Freelance.

Thanks for the info. I've tried Kadee's in HO & 0n3 The HO Kadee's sit to high and I'd need longer screws (size unknown) to mount them lower. The On3 Kadee's have the longer screws but now I need to drill & tap the tender because the screw diameter is too big.  Hopefully, Dwight can shed some light on the subject and get me pointed in the right direction.


I have three of the On30 locomotives 2 k-27's and 1 k-28 all of them needed a pad built for the standard KD#5. I am still working out what I want to do with the front coulper, I dont't need this to double head them but it would be nice for switching. This one of those problems where the Locomotives were designed to O narrow gauge standards not On30 standards. It would have been nice if MMI would have included a spacer for the coupler for those of us that are using the HO standard on our On30. I went to my local hobby shop and bought longer 2-56 screws and some plastic and tapped the hole to 2-56. This way I can pull the KD #5's off and install standard On3 couplers on these locos in the future if I so choose.

Thank you very mmuch for the information. Headed off to my local hobby shop for supplies.
My I ask why you are using ho couplers.
kd makes very nice on3 couplers that are to scale.
the ho couples are way too small
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