Synchronization And Linkage Adjustments - TOHATSU 40 Service Manual

SYNCHRONIZATION AND
LINKAGE ADJUSTMENTS
To ensure consistent engine idling and smooth operation
throughout the full RPM range, it is important that each procedure
be performed exactly as written and in the following sequence:
• 1 st - Ignition Timing Adjustment
• 2nd - Carburetor Synchronization
• 3rd - Oil Pump Aperture Adjustment
Before beginning procedures, disable the ignition
system to prevent accidental engine startup.
The following applies to all engines:
1. Should the stopper lever barely contact the
stopper, damage to the carburetor may occur
when the throttle lever is in the full throttle
position. Stopper lever should firmly contact
the stopper.
2. If stopper lever is not in firm contact with the
stopper, but a small gap is present, no
damage should occur.
3. Carburetors #2, #3 and/or #4 will have a gap
between throttle stop and stopper when
Carburetor #1 is properly adjusted.
4. After fine adjustment, stopper bolt lengths
may differ from pre-adjustment settings.
Adjustment lengths for links (1), stoppers (2), and
1
carburetor link rods (3) are measured as shown.
The seam at the mating surfaces of the crankcase
halves is the alignment point for all ignition timing
degree measurements.
3-/ 4-Cylinder
GENERAL SERVICE INFORMATION
WARNING
CAUTION
NOTE
NOTE
T1068
2-25