Yanmar 3GM30F Specifications download pdf (Page 5)

4.2.4 Replacing the Marine Gear Lube Oil

Replace the lube oil in the marine gear by using the procedure described above.

Replace

first • • after initial 50 hours

second time • • every 250 hours

thereafter • • every 1000 hours

4.3 Cooling Water System

4.3.1

Check and supply of cooling water

1. Check the cooling water level in the sub-tank.

If the water level is close to the lower limit, remove the sub tank cap and fill with fresh water

to the upper limit.

2. When the water level in the sub-tank is low, remove the filler cap for the fresh water tank and

check the amount of cooling water in the fresh water tank. Fill with fresh water to overflowing

if the level is low.

Check the fresh water level before operation while the engine is cold.

Checking the water level while the engine is hot is dangerous, and the cooling water

reading will be misleading due to thermal expansion.

Check and supply cooling water daily at the sub-tank.

Do not remove the fresh water cooler f1iller cap regularly.

The amount of water in the sub tank will increase during operation. This is normal.

When the engine is stopped, the temperature of the cooling water will drop causing the

extra water in the sub tank to return to the fresh water tank.

Inspection • • daily (before starting)

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Yanmar 3GM30F Specifications Page 5