Engine And Transmission Oil - Yamaha QT 50F Service Manual

2. Oil pumpi wire adjustment
a. Remove the slack in throttle wire 2 by
turning the adjusting screw attached to
the carburetor.
b. Loosen the lock nut.
c. Turn thei adjusting screw so that the
mark on the adjusting pulley is aligned
with the Phillips head screw attached to
the adjusting plate.
d. Screw in the lock nut until tight.
1. Adjusting pulley
2. Phillips head
Minimu
Remove
case a
and dial
stroke
n j > pump stroke adjustment
the side cover and air cleaner
ss^mbly, set the magnetic stand
gauge, and measure the pump
while keeping the engine idle.
a. To adjust the plunger stroke, first loosen
the lock nut.
b. Turn the adjusting bolt in or out for
proper adjustment.
Turning the adjusting bolt clockwise
decreases the plunger stroke; while
turning counterclockwise increases the
plunger stroke.
c. When the correct stroke is attained,
tighten the lock nut.
Minimum stroke
Maximum stroke
Pulley color code
Pulley adjust mark
0.20 ~ 0.25 mm
(0.008 ~ 0.010 in)
0.95 ~ 1.10 mm
(0.037 ~ 0.043 in)
Yellow
7777777f//7777777
D. Engine and Transmission Oil
1. Engine oil (Autolube oil)
Recommended oil:
Yamalube 2-cycle Oil
a. Oil warning light
Bulb check: Turn the main switch to
"•*•"position, and if the oil warning light
comes on, it is in good condition.
If not, check the light bulb and lead
wires.
Oil level check: Turn the main switch to
"ON" position, and if the oil warning
light does not come on, the oil level in
the tank is correct. If lights up, add
Yamaha 2-oycle engine oil. For further
details, refer to page 6-9.
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