3-21
dummyheaddummyhead
MAINTENANCE
ADJUSTMENT
Remove the propeller and set the outboard motor gear
case in a test tank filled with water. Start the engine.
Disconnect the 2P connector [1] from the IAC valve.
The MIL [2] should come ON and the warning buzzer
should sound (intermittent sound: long beep).
Wait until the engine speed stabilizes, and then check
the idle speed.
If the idle speed is outside the specification, adjust by
turning the idle adjusting screw [1] in or out.
After adjustment, stop the engine and apply Nippon
Paint Uni-pack 200 or equivalent to the entire surface of
the idle adjusting screw [1] head.
Connect the IAC valve 2P connector.
Reset the ECM (page 5-5).
Start the engine. Wait until the engine speed stabilizes
under no load, and recheck the idle speed.
If the idle speed is outside the specification, inspect and
troubleshoot the idle control system (page 4-6).
BASE IDLE SPEED (AT NEUTRAL):
620 ± 30 min
-1
(rpm) (with IAC valve connector
disconnected)
SPECIFIED IDLE SPEED (AT NEUTRAL):
750 ± 50 min
-1
(rpm)
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