Yamaha MTM155 - Adjusting the Engine Idling Speed

Periodic maintenance and adjustment
7-15
7
2. If dirt or water is visible, remove
the hose, clean it and then install
it.
EAU34302
Adjusting the engine idling
speed
The engine idling speed must be
checked and, if necessary, adjusted as
follows at the intervals specified in the
periodic maintenance and lubrication
chart.
The engine should be warm before
making this adjustment.
Check the engine idling speed and, if
necessary, adjust it to specification by
turning the idle adjusting screw. To in-
crease the engine idling speed, turn
the screw in direction (a). To decrease
the engine idling speed, turn the screw
in direction (b).
TIP
If the specified idling speed cannot be
obtained as described above, have a
Yamaha dealer make the adjustment.
1. Idle adjusting screw
1
(b)
(a)
Engine idling speed:
1300–1500 r/min
UB1VE0E0.book Page 15 Tuesday, September 3, 2019 1:19 PM