Yanmar 3JH4E Service Manual page 91

(9) Removing the cooling water pipe (seawater/ fresh water)
1) Remove the seawater pipe (seawater pump-heat exchanger).
2) Remove the fresh water pipe (fresh water pump- heat exchanger. exhaust manifold-fresh water
pump).
3) Remove the fresh water pipe (cylinder block-lube oil cooler, lube oil cooler-fresh water pump).
Mixing elbow
(Seawater pipe)
(10) Removing the heat exchanger (exhaust manifold, fresh water tank unit)
Remove the heat exchanger and gasket packing.
(11) Removing the seawater pump
1) Pull out the bearing mounts, receptacles from the seawater pump mounting side and from the
opposite side of the gear case.
2) Remove the seawater pump.
Heat exchanger
Seawater pump
Seawater
inlet
4. Disassembly and Reassembly
Exhaust manifold
Fresh water pump
From lube
oil cooler
(Fresh water pipe)
75
Heat exchanger