GASOLINE ENGINES BRAVO MODELS
Page 93 of 116
ENGINE IDLE SPEED (CARBURETED 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.
WIDE-OPEN-THROTTLE TEST
IMPORTANT: To run engine at full throttle before the break-in period is complete, fol-
low this procedure.
• Start engine and run at idle rpm until normal operating temperature is reached.
• Run boat up on plane.
• Advance engine rpm (in 200 rpm increments) until engine reaches its maximum rated
rpm.
To test if the correct propeller has been installed, operate boat (with normal load on board)
at WOT and check rpm with an accurate tachometer. Engine rpm should be near top of the
specified range so that under a heavy load engine speed will not fall below specifications.
If engine speed is too high, replace propeller with a higher pitch propeller. Normally, a
300-400 rpm change exists between propeller pitches.
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