ALL ORDERS PLACED BY 3PM SHIPPED SAME DAY(EXCLUDING WEEKENDS/BANK HOLIDAYS)
DIGITRAINS OPEN DAY 17TH JANUARY 2026
NEXT SHOW WE WILL BE ATTENDING - DONCASTER 7TH - 8TH FEBRUARY
The IMF4 is a N-scale drop-in decoder which is designed for InterMountain F-unit locomotives. Examples include the following:
InterMountain:
F3A/B
F7A/B
F9B
See the installation pages for a full list of compatible engines!
NOTE: This version of the IMF4 is designed for the older style InterMountain frame where the motor is connected to the control board via brass motor feet.
ALL ORDERS PLACED BY 3PM SHIPPED SAME DAY(EXCLUDING WEEKENDS/BANK HOLIDAYS)
DIGITRAINS OPEN DAY 17TH JANUARY 2026
NEXT SHOW WE WILL BE ATTENDING - DONCASTER 7TH - 8TH FEBRUARY
