Yanmar 4JH3-TE, Operation Manual

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38 5. MAINTENANCE & INSPECTION
KMH4A
KMH4A
(2) Replacing the Marine gear Oil and Washing the Oil Filters (1st time)
Precautions for Removing Hot Oil to Prevent Bums
If extracting oil from the engine while it is still hot, do not let the oil splash on
you.
During initial operation of the marine gear, the oil is quickly contaminated due to the initial wear of internal
parts. The lube oil must therefore be replaced early.
Wash the lube oil filter at the same time.
1. Drain off the marine gear oil.
it is more efficient to drain the marine gear oil while
the marine gear is still warm after operation.
1) Remove the filler port cap and insert the hose of
the oil drain pump(optional) into the filler port until
it reaches the bottom of the marine gear case.
2) Drain off the oil using the drain pump.
2. Wash the lube oil filter.
1) Remove the side cover and then remove
the filter inside the cover.
2) Clean the filter thoroughly with kerosene.
3) Hold the filter in place with the coil spring and insert
and reattach the side cover and screw in the side
cover bolt. Insert an O-ring on the filter side of the
side cover.
3. Fill with marine gear oil.
1) Fill with the specified amount of oil.
→
See 3.4
2) Run a trial operation to check for oil leakage.
Dipstick (Lube oil)
Drain pump
Drain plug
Lube oil filter
Side cover
Filter
Coil spring
O-ring