Yanmar 4JH4E - Position of Top Dead Center and Fuel Injection Timing; Damper Disc

5. Inspection and servicing of basic engine parts
214
5.8.1 Position of top dead center and
fuel injection timing
The marking is applied to the flywheel and flywheel
housing to indicate the top dead center of this
engine or the fuel injection timing angle.
(1) Marking
The marking is applied on the flywheel to
show the crankshaft angle.
(2) Matching mark
The matching mark is made at the hole of the
flywheel housing.
5.8.2 Damper disc
When coupling a marine gear with an engine, a
damper disk is used to absorb the torque
fluctuations of the engine.
Refer to the marine gear service manual of the
separate volume for the detail.
Matching mark
Flywheel housing
1
010608-00E
Spline
Spring
Pin
010607-00E