MODEL NB
Beginning in 1925 a replacement for the popular
model N was introduced, the NB. The NB was the first to exchange its
ignitor for a Wico EK magneto and sparkplug. No igniters were ever used
on the NB, some had a battery and high tension coil but the majority
used the Wico. Available in 1 1/2, 2, 3, 4, 6, 8, 10 and 12 hp they
effectively covered all power needs with a good selection on the smaller
size engines. 1928 saw the 4 hp being re-rated to 4 1/2 hp. All engines
4 hp and up used the familiar fly ball governor, 3 hp and under used a
sliding weight in the left flywheel. There were noticeable differences
in the smaller engines from the previous Model N's. The NB had a mixer
that bent downward much further than that of the N. The design of the
governor weight and flywheels was also different. Engines 4 to 12 hp
were continued as the NB until the end came in 1933. Those 1 1/2 to 3 hp
fell out in favor of the NC and later ND engines.
