Yanmar 3JH4E Service Manual page 105

7) Read the timing scale on the flywheel from
the matching mark on the flywheel housing
hole. It is standard fuel injection timing if the
timing mark position meets the fuel injection
timing of the below table.
Injection timing FID (FIC-Air)
bTDC
8) Repeat the step 5) to 7) a few times.
Note:
Injection timing check for one cylinder is
generally sufficient. If it is to be checked for all
cylinders, check each cylinder in the ignition
order. (1-3-2-1 for 3JH4E, 1-3-4-2-1 for 4JH4E)
The cylinder to be checked is not limited to the
No.1 cylinder and any cylinder may be
checked.
9) If the injection timing is out of the standard
value, loosen the fuel pump mounting nut and
incline the fuel injection pump toward or away
from the engine for adjustment. Incline toward
the engine to delay the timing, and away from
the engine to advance it.
[4JH4-TE and 4JH4-HTE]
The fuel injection timing is adjusted so that
engine performance may become the best
condition and comply with the emission
regulations.
This VE pump equips W-C.S.D (Wax type Cold
Start Device), which improves the startability of
the engine by advancing the injection timing
according to the coolant temperature in a cold
weather.
The injection timing of this engine can be
adjusted by turning the VE pump, while reading
the plunger lift by a dial gage. Make sure that
the release of W-C.S.D is required at the time
of injection timing adjustment.
The fuel injection timing is adjusted by the
following procedure.
Model Standard
3JH4E 12±1 (13±1)
4JH4E 13±1 (14±1)
85
2. Inspection and adjustment