Yanmar 3JH4E - Every 50 Hours of Operation

Adjusting Propeller Shaft Alignment
The flexible engine mounts are compressed
a little during initial engine operation and
may cause misalignment between the
engine and the propeller shaft.
After the first 50 hours of operation, the
alignment should be checked and
readjusted if necessary. This is considered
normal maintenance and the adjustment
requires specialized knowledge and
techniques. Consult your authorized
Yanmar marine dealer or distributor.
Every 50 Hours of Operation
After you complete the initial 50 hour
maintenance procedures, perform the
following procedures every 50 hours
thereafter or monthly, whichever comes
first.
• Draining Fuel Filter / Water Separator
• Checking Battery Electrolyte Level
Draining Fuel Filter / Water
Separator
3JH4E and 4JH4AE (Attach to Hull)
0004564
(1)
(2)
Figure 10
1. Close the fuel cock of the fuel tank.
2. Loosen the drain plug (Figure 10, (1))
of water separator and drain off any
water or dirt collected inside.
3. After draining, tighten the air bleed
screw (Figure 10, (2)).
PERIODIC MAINTENANCE
JH4 Series Operation Manual 65