Governor System - Onan MJA Series Service Manual

57
3.4 Governor System
The governor system ,controls engine speed and the speed drop under
load. The system consists of a governor cup with steel flybaUs on the
camshaft; a yoke, shaft, and arm; governor spring and adjusting screw;
and linkage to the carburetor throttle lever.
Differing engine speeds change the position of the governor cup on its
shaft.' This change is transmitted by the shaft, arm, and linkage to the
carburetor throttle lever. Engine speed is controlled by the tension on
the governor spring. Sensitivity - the speed drop from no load
to
full
load - is controlled by the number of spring coils used. More coils
used give less speed drop from no load to full load - more sensitivity.
GOVERNOR
• FLY BALLS
.-..,.
'.
\
;
!
fGOVERNOR
i:
YOKE
".A'
GOVERNOR CUP
• ENGINESPEED
AD.JUSTING STUD
AND NUT
(S££ INS£T)
FIG 3. 4.A - GOVERNOR SYSTEM, MJB, IN'CLUDING ADJUSTMENT