These two K-line engines look the same to me other than the paint. Anyone know the difference? I'm sure there is a difference but I can't see any. Don
Don, the visible differences between an F-3 and an F-7 are, the F-3 had much higher roof fans, as the red Santa Fe. Also, the F-3's grillwork (on the sides) resembles chickenwire.
You can pretty much see the different grill work in those pics.