BRP Johnson J30TEL4SUA 2007 Service Manual page 60

MAINTENANCE
CARBURETORS
Connect each synchronizer tube hose to its corre-
sponding adapter.
1
2
1. No. 1 intake manifold position
2. No. 2 intake manifold position
Start the engine.
IMPORTANT:
When synchronizing the throttle
valves, only synchronize them in the idle position.
With the engine warmed up and idling in neutral
gear at 850 to 950 RPM, the steel balls must be at
the same height in each of the tubes.
58
Adjust the throttle valve screw(s) until the carbure-
tors are synchronized (steel balls at the same
height in each of the tubes) and the engine idles
smoothly.
1
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1. Throttle valve screw
IMPORTANT:
raised or lowered due to the adjustment, it is nec-
essary to reset the engine to the specified idle
speed by turning the idle adjusting screw of the
No.3 carburetor.
Shift into FORWARD, then check the in-gear idle
speed. This should be approximately 850 RPM.
Stop the engine. Remove the synchronizer gauge
adapters and install the impulse plugs.
001343
If the engine speed has been
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