Futaba GY701 - Manual (Page 57)

F
USELAGE
S
ETTING
P
RECAUTIONS
57
different from that with a normal muffler. Adjust
the needle (and pipe length) so that engine speed
changes are proportional to the throttle opening.
If the engine speed does not change linearly, the
governor will not perform satisfactorily with a
muffler or a pipe that does not allow the carbure-
tion to be linear.