Inspection Every Two Years; Inspection Every 1,000 Hours Or Four Years - Yanmar 3JH4E Service Manual

2. Inspection and adjustment

2.2.5 Inspection every two years

When a long time will pass, rubber hoses will
deteriorate because of weather resistance.
Replace rubberized hoses for water and fuel
periodically every two years or 500 hours of
operation, whichever comes first.
Check and replace the used hose clips with new
ones, if necessary.

2.2.6 Inspection every 1,000 hours or four years

Be sure to check the following points every 1,000 hours or four years operation, whichever comes first.
No.
(1) Check the injection timing
(2) Check the injection spray condition of a fuel nozzle
(3) Check the impeller of the seawater pump
(4) Clean and check the water passages
(5) Diaphragm assembly inspection
(6) Adjust the tension of the alternator driving belt
(7) Adjust intake/exhaust valve clearance
(8) Check/adjust the remote control operation
(9) Adjust the propeller shaft alignment
(1) Check the injection timing
[3JH4E and 4JH4E]
The fuel injection timing is adjusted so that
engine performance may become the best
condition. As for the inspection and adjustment
of the fuel pump, it is based on the service
manual of the CLH pump. The fuel injection
timing is adjusted by the following procedure.
1) Complete air bleeding from the fuel line and
set the engine ready for starting.
2) See that the timing marks on fuel pump
mounting flange and gear case are aligned.
3) Set the speed control lever at the operating
position.
4) Disconnect the injection pipe on the fuel
pump side for the No.1 cylinder. (Do not
remove the delivery holder.)
5) Check the fuel discharge from the delivery
holder while turning the crankshaft clockwise
as seen from the gear case side, and stop
turning it at the same time when the fuel
comes out. Wipe out the fuel of the delivery
holder exit. Next, turn the crankshaft in the
opposite direction (counterclockwise), and
return it to about 20 degrees before top dead
center.
6) Check again the fuel discharge from the
delivery holder while turning the crankshaft
clockwise, and stop turning it at the same
time when the fuel comes out.
Inspection item
84
Flywheel housing
Matching mark
010611-00E