ADJUSTMENT AND OPERATION
13-3
1.2 Inspecting and adjusting fuel injection timing
1.2.1 Inspecting fuel injection timing
(1) In advance, bring the piston of No.1 cylinder to
compession top dead center. Remove the delivery valve
holder, delivery valve, spring and stopper from the
No.1 cylinder of the fuel injection pump, and reinstall
the delivery valve holder only.
(2) Install a spare injection pipe to the No.1 plunger of the
fuel injection pump. Face the other end of the injection
pipe to downward so that the fuel flow-out condition
can be seen clearly.
(3) Rotate the crankshaft to 60 degree before compression
top dead center of No.1 cylinder.
(4) Feed the injection pump using the priming pump. With
flowing the fuel out from the injection pipe, rotate the
crankshaft gradually in the normal direction.
(5) When the fuel flow is getting fewer, rotate the
crankshaft more slowly. When the fuel flow stop
completely, stop rotating the crankshaft.
(6) Make sure the pointer indicates the fuel injection timing
of the graduation mark on the crankshaft pulley.
Inspecting fuel injection timing (1)
Inspecting fuel injection timing (2)
1.2.2 Adjusting fuel injection timing
To advance the fuel injection timing, turn the fuel injection
pump toward the crankcase.
To retard the fuel injection timing, turn the fuel injection
pump away from the crankcase.
Adjusting fuel injection timing
Item Standard
Fuel injection timing
Varies depending on the
specifications
Delivery valve
holder
Delivery valve
Spring
Advance timing when
later than normal
Retard timing when
earlier than normal
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