Yanmar 4JH5E - Page 80

PERIODIC MAINTENANCE
74 JH Series Operation Manual
1. Remove the belt cover.
2. Check the belt by pushing on the
middle of the belt (Figure 4, (1)) with
your finger.
With proper tension, the belt should
deflect 8 to 10 mm (approximately
3/8 in.).
3. Loosen the 3 bolts of alternator
(Figure 4, (2) (3) (4)).
4. Screw in the adjusting bolt
(Figure 4, (4)) and move the alternator
to adjust the belt tension properly.
5. Tighten the 3 bolts of the alternator.
6. Install the belt cover.
Inspecting and Adjusting
Intake / Exhaust Valve Clearance
Proper adjustment is necessary to
maintain the correct timing for opening and
closing the valves. Improper adjustment
will cause the engine to run noisily,
resulting in poor engine performance and
engine damage. Consult authorized
Yanmar Marine dealer or distributor to
adjust the intake / exhaust valve
clearance.
Checking and Adjusting Remote
Control Cables
NOTICE
Never adjust the high-speed stop bolt on
the governor. This will void the engine
warranty.
Adjusting Engine Speed Remote
Control Cable
Ensure the control lever on the engine side
moves to the high-speed stop position and
low-speed stop position when the remote
control lever is moved to HIGH and then to
LOW.
3JH5E / 4JH5E
Figure 5
1 – Control Lever
2 – Fuel Injection Pump
3 – Low-Speed Stop
4 – Adjustment Screw
5 – High-Speed Stop
6–Cable
4JH4-TE / 4JH4-HTE1 / 4JH4-HTE
Figure 6
1–Cable
2 – Fuel Injection Pump
3–Cable Fitting
4 – Low-Speed Stop
5 – Control Lever
6 – High-Speed Stop
(1) (2)
(5)(6) (4) (3)
027093-00X
(1)
(2)
(3)
(4)
(5)
6
(6)
0004496
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