Yanmar 4JH3-TE, Operation Manual

Page: 23 / 65

3. BEFORE OPERATION 19
3.1.2 Lube oil
(1) Selection of Engine Lube Oil
Use the following lube oil:
*API Classification CD
(Standards of America Petroleum Institute)
*SAE Viscosity
15W40
(Standards of Society of Automotive Engineering)
NOTICE:
Using other than the specified lube oil will lead to seizure of parts inside the engine and
gear device , abnormal wear, and shorten engine life. It will also effect the starting ability
and power output.
(2) Marine Gear Oil and sail-drive oil
Be sure to use the following lube oil for the marine gear and the sailing boat drive.
• KBW21
Converter oil for automobiles ATF
• KM4A, KMH4A
API Classification .............. CC or higher
SAE Viscosity.................... #20 or #30(not available multi grade)
• SD40-4T
Refer to the operation manual for the sail drive.
(3) Handling the Lube Oil
• When handling and storing lube oil, be careful not to allow dust and water to enter the lube oil.
Clean around the filler port before refilling.
• Do not mix lube oils of different types or brands.
Mixing may reduce the lubricating performance. Different oils are used for the engine and the marine
gear.
Be careful to use the correct oil for each one and store in separate clearly labeled containers.
3.1.3 Cooling Water
NOTICE:
Be sure to add LLC to cooling fresh water.
In cold seasons, the LLC is especially important.
Without LLC, cooling performance will decrease due to scale and rust in the cooling water
line. Without LLC, cooling water will freeze and expand, breaking various parts.
1) Choose LLC which will not have any adverse effects on the materials (cast iron, aluminum, copper, etc.) of
the engine’s fresh water cooling system.
2) Strictly use the proper mixing ratio of LLC to fresh water as instructed by the LLC maker. If incorrect ratio of
LLC to fresh water is used, the cooling performance of the cooling water will drop and the engine may
become overheated.
3) Do not mix different types (brand) of LLC, chemical reactions may make the LLC useless and engine trou-
ble could result.
NOTICE:
Excessive use of LLC also lowers the cooling efficiency of the engine.
Be sure to use the mixing ratios specified by the LLC maker for your temperature range.