Idle Speed - BRP Johnson J30TEL4SUA 2007 Service Manual

MAINTENANCE

IDLE SPEED

IDLE SPEED
IMPORTANT:
Before synchronizing the throttle
valves, check the link mechanism and the carbu-
retor valves for smooth operation.
Start the engine and allow the engine to warm up
to normal operating temperature.
Connect a tachometer to the engine in the follow-
ing manner:
•
Yellow lead wire to Yellow / Black lead wire of
the power pack
•
Gray lead wire to the positive (+) terminal of a
12V battery
•
Black lead wire to the negative (–) terminal of a
12V battery
•
Set the pole selection switch in the tachometer
to "12".
1
3
1. Tachometer
2. 12V battery
3. Gray lead wire
4. Yellow lead wire
5. Black lead wire
Check the idle speed after the engine speed has
stabilized. The idle speed in NEUTRAL should be
850 to 950 RPM.
64
IMPORTANT:
make sure that the carburetor throttle valves are
properly synchronized. Refer to "Synchronizing
the Carburetor Throttle Valves" on page 56.
If the idle speed is out of specification, adjust the
idle speed by rotating the idle adjusting screw
only. DO NOT rotate the throttle valve screws on
the No. 1 or No. 2 carburetors.
1
4
1. Idle adjusting screw
5
2
001331
Before adjusting idle speed,
001334