TOHATSU BFT250A Service Manual page 81

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USING A COMMERCIALLY AVAILABLE DIGITAL
MULTIMETER
Install a commercially available digital multimeter with
an inductive pickup (Fluke 88) [1].
Connect the inductive pickup to the No.1 ignition coil
primary wire [2] with the "SPARK PLUG" side toward
the spark plug as shown.
Start the engine.
Wait until the engine speed stabilizes under no load,
and check the idle speed.
SPECIFIED IDLE SPEED (AT NEUTRAL):
650 ± 50 min
• If the idle speed is outside the specification, adjust it
(page 3-23).
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 [2].
The MIL [3] should come ON and the warning buzzer
should sound (intermittent sound: long beep).
-1
(rpm)
[2]
[1]
[2]
MAINTENANCE
[1]
[3]
3-23