PERIODIC MAINTENANCE 2-13
SYNCHRONIZING THROTTLE VALVES
[ 09913-13121 : Carburetor synchronizer
NOTE:
Before synchronizing the throttle valve, check link mechanism
and carburetor valves for smooth operation.
Prior to this service work
• Remove the STBD side lower cover.
[Calibrate carburetor synchronizer]
1. Remove the impulse plug 1 of No.3 intake manifold.
2. Install carburetor synchronizer gauge adapter 2 to impulse
plug hole of No.3 intake manifold.
3. Connect the hose of No.3 tube in carburetor synchronizer
to the adapter 2.
4. Start the engine and warm it up enough.
Make sure the choke valve is fully open.
5. Check idle speed, then rotate idle adjusting screw of No.3
carburetor to set the engine at the specified idle speed.
Idle speed (in neutral gear) : 850 – 950 r/min
CARBURETOR
Inspect initially after 20 hours ( 1 month ) and every
100 hours (6 months ) thereafter.
EXTERNAL CHECK
If crack or other damage on carburetor body / lever / rod / con-
nector / fuel inlet or silencer, replace.
1. Carburetor synchronizer
2. Adapter
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