E2a Motor / Gearbox Recommendations

NW Modeling List nw-modeling-list at nwhs.org
Thu May 23 13:15:31 EDT 2019

I got this answer from Ken Clark on another site. He's quite experienced with doing remotoring/regearing so his word is pretty good. Here's his response.


  I think I answered a similar question recently.  I believe these are Toho models.  My experience with that builder was Weyerhaeuser  2-8-8-2s

with extremely noisy spur gears outside the rear gearbox.  If your gearbox is 27:1, I would  first try installing the 18mm Mabuchi SF-266SA 6 pole motors.

If the top speed is acceptable (this is a 7,000 rpm motor @ 12 volts). with DCC at 18 volts the rpms may be closer to 10,000.

That would be a big improvement over the OEM open frame motor and should be quieter as well.  At around $2 each on eBay, 

this would be certainly a modest investment for the degree of improvement.  The ultimate solution would be a NWSL ball bearing idler gearbox

at around $50 each; not sure if that would be a $200 improvement.

ken clark


Hope this helps. I have 4 E-2's to work over as well as changing details for specific engines. Don't know when I'll have the time or money but it's a project I'm looking forward to.
Roger HuberDeer Creek Locomotive Works 

    On Saturday, May 18, 2019, 12:21:57 PM CDT, NW Modeling List via NW-Modeling-List <nw-modeling-list at nwhs.org> wrote:  
 Hi list. I have an NWSL E2a (1940 version) in my cabinet that I will eventually re-gear and re-motor.  Given that NWSL may go/is going out of business, I figured I better secure what I need now.  

Advice on specific Motor / gearbox combinations that have worked for others in this model would be appreciated!


Matt Goodman
Columbus, Ohio US

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