Long Term Storage - Yanmar 4JH4-TE Operation Manual

38 4. HOW TO OPERATE

4.6 Long Term Storage

(1) In cold temperatures or before long term
storage, be sure to drain the seawater
from the seawater cooling system.
Drain seawater from the seawater cooling system
after the engine has cooled down.
If seawater is left inside, it may freeze and damage
parts of the cooling system (fresh water cooler, sea-
water pump, etc.) when ambient temperature is
below 0°C [32F].
1) Open the seawater drain cock attached on the
seawater pump cover for 4JH4-TE. Open the sea-
water drain cocks attached on the seawater pump
cover and inter cooler for 4JH4-HTE. Drain off the
seawater inside.
If no liquid comes from the drain cock(s), it may be
necessary to use a stiff wire to remove any debris
to allow drainage.
2) Loosen the 4 bolts fixing the side cover of the sea-
water pump, remove the cover and drain the sea-
water from inside.
Retighten the bolts when finished.
3) Close the drain cock(s).
4JH4-TE
1
2
1 Coolant tank
2 Fresh water pump
3
4
1 Drain cock for fresh water 3 Drain cock for seawater
2 Fuel pump
4
3
008790-00X
3 Drain seawater from
seawater pump cover
4 Drain cocks for fresh water
2
1
008791-00X
4 Clutch cooler