BRP Johnson J30TEL4SUA 2007 Service Manual page 59

Remove the impulse plug of the No. 3 intake man-
ifold.
1
1. Impulse plug
Install a carburetor synchronizer gauge adapter in
the hole. Connect the hose of No. 3 tube in the
carburetor synchronizer to the adapter.
1
1. Gauge adapter
2. No. 3 tube hose
Start the engine and allow the engine to warm up
to normal operating temperature. Make sure that
the choke valve is fully open.
Check the idle speed, then rotate the idle adjust-
ing screw of the No. 3 carburetor to set the idle
speed in neutral gear at 850 to 950 RPM.
1
001336
1. Idle adjusting screw
Turn the balancer air screw until the steel ball is at
the center line of the tube.
Repeat for the No. 1 and No. 2 synchronizer
tubes.
2
001337
1. Balancer air screw - No. 1 tube
2. Balancer air screw - No. 2 tube
3. Balancer air screw - No. 3 tube
Remove the impulse plugs from No. 1 and No. 2
intake manifolds, then install the carburetor syn-
chronizer gauge adapters in these holes.
MAINTENANCE
CARBURETORS
3
001338
1
2
3
001339
57