Checking Water Trap Under Engine Oil Tank - Yamaha D150H Owner's Manual

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A diagnostic tachometer should be used
for this procedure.
1) Start the engine and allow it to warm
2) Adjust the throttle stop-screw to set
NOTE:
Correct idling-speed adjustment is only
possible if the engine is fully warmed-up.
If not warmed up fully, the speed setting
will tend to be too high. If you have diffi-
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culty obtaining the specified idle, consult
a Yamaha dealer or other qualified
mechanic.
1 Throttle stop-screw
EMK56010
CHECKING WATER TRAP UNDER
ENGINE OIL TANK
There is a trap at the bottom of the engine
oil tank. If water or foreign matter is visi-
w
ble in this trap, consult a Yamaha dealer.
1 Trap
2 Engine oil tank
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up fully in Neutral until it is running
smoothly. If the outboard is mounted
on a boat, be sure the boat is tightly
moored.
the idling speed to specification (see
"SPECIFICATIONS") by turning the
stop-screw clockwise to increase the
idling speed, and turning it counter-
clockwise to decrease the idling
speed.
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