Yamaha 40V - Oil Injection System; Oil Tank Water Drain; Oil Pump Link Adjustment

3-6
INSP
ADJ
E
CONTROL SYSTEM/OIL INJECTION SYSTEM
● Turn in the pilot screw until it is lightly
seated.
● Turn out the pilot screw to specification.
Pilot screw (turns out):
40 hp: 1-1/2 ± 1/4
50 hp (M model): 1-5/8 ± 1/4
50 hp (EM, E model): 1-3/8 ± 1/4
● Start the engine and allow it to warm
up for a few minutes.
● Attach the tachometer to high tension
lead of the cylinder #1.
Tachometer:
YU-08036-A/90890-06760
● Adjust the throttle stop screw in or out
until specified idle speed is obtained.
Turning in → Idle speed becomes higher.
Turning out → Idle speed becomes lower.
● While lightly pushing the throttle lever
of the lower carburetor in the direction
of the arrow (full-closed), tighten the
throttle lever securing screw of the
upper and middle carburetors by turn-
ing the screws counterclockwise.
OIL INJECTION SYSTEM
Oil tank water drain
1. Check:
● Drain hose 1
Contamination → Drain.
NOTE:
Remove the drain hose at the upper side
and drain the contaminates.
Oil pump link adjustment
1. Check:
● Clearance a
Out of specification → Adjust.
Clearance a:
1.0 mm (0.04 in)