GASOLINE STERNDRIVE INSTALLATION MANUAL
90-860172011 Page 111 of 137
Boat In The Water Tests
ENGINE IDLE SPEED - 3.0L MODELS
WARNING
DO NOT leave helm unattended while performing idle speed adjustment. Boat
MUST BE moving forward (not tied to the dock) when setting idle speed.
1. Disconnect throttle cable from carburetor.
2. Start engine and place remote control lever in forward gear, idle position.
3. Adjust idle speed adjustment screw to obtain 700 rpm.
4. Stop engine. Readjust cable barrel and reinstall throttle cable.
ENGINE IDLE SPEED - V6 AND V8 MODELS
CAUTION
Avoid engine damage. Ensure that cooling water is supplied to the engine if it will
be run with boat out of the water. See instructions in the Operation, Maintenance
and Warranty Manual entitled “Flushing Cooling System,” for instructions on con-
necting flush device.
The engines covered in this manual should idle at rpm (as specified in Operation, Mainte-
nance and Warranty Manual) with engine at normal operating temperature. If idle speed is
incorrect, proceed as follows:
1. Disconnect the throttle cable from carburetor.
2. Connect a shop tachometer to engine.
IMPORTANT: In order to properly set idle speed, the ignition module MUST BE locked
in the Base Timing Mode. This is necessary because of the Idle Speed Control feature
that exists in the ignition module. This must be done before the key switch is turned
to the on or start position.
3. Using a jumper wire, connect the ignition system Timing Lead (PUR/WHT wire) to a
good engine ground (–). This locks the ignition module into the Base Timing Mode. Refer
to “Engine Wiring Harness” diagram in this manual.
4. Start engine and place the remote control lever in neutral gear, idle position.
5. Adjust idle speed to 650 rpm.
6. Stop engine. Readjust cable barrel and reinstall the throttle.
IMPORTANT: Throttle cable barrel must be adjusted properly.
IMPORTANT: Be sure to disconnect the jumper wire from the ignition system test lead
before attempting to resume normal operations. If the jumper wire is left in place, the
ignition module will operate in the Base Timing Mode. This means that the additional
timing advance features would not be functioning.
7. Remove the jumper wire from the timing lead.
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