Adding Marine Gear Oil; Checking And Adding Sail Drive Oil; Engine Coolant; Engine Coolant Specifications - Yanmar 3JH5E Operation Manual

2. Remove the filler cap (Figure 9, (1)) at
the top of the housing.
3. Remove dipstick (Figure 9, (2)) and
wipe with clean cloth.
4. Fully reinsert dipstick.
5. Remove dipstick. The oil level should be
between upper (Figure 9, (3)) and
lower (Figure 9, (4)) lines on the
dipstick.
6. Fully reinsert dipstick.

Adding Marine Gear Oil

1. Make sure the engine is level.
2. Remove the filler cap (Figure 9, (1)) at
the top of the housing.
3. Fill with oil to the upper limit on the
dipstick (Figure 9, (3)). See Marine
Gear Oil Specifications on page 38.
NOTICE: NEVER overfill the marine
gear with oil.
4. Fully reinsert dipstick.
5. Tighten the filler port cap by hand.
Checking and Adding Sail Drive
Oil
Refer to the operation manual for SD50-T for
the procedure to check and fill the sail drive
oil.
JH Series Operation Manual

ENGINE COOLANT

Engine Coolant Specifications

Note: In the U.S., LLC is required for the
warranty to be valid.
• Texaco Long Life Coolant (LLC), both
standard and premixed, product code
7997 and 7998
• Havoline Extended Life
Antifreeze / Coolant, product code 7994
NOTICE: Following the manufacturer's
recommendations, use a proper LLC which
will not have any adverse effects on the
materials (cast iron, aluminum, copper, etc.)
of the engine's cooling system. See Engine
Coolant Specifications on page 33.
ALWAYS use the mixing ratios specified by
the antifreeze manufacturer for the
temperature range.

Coolant (Closed Cooling System)

NOTICE: ALWAYS add LLC to soft water –
especially when operating in cold weather.
NEVER use hard water. Water should be
clean and free from sludge or particles.
Without LLC, cooling performance will
decrease due to scale and rust in the coolant
system. Water alone may freeze and form
ice; it expands approximately 9% in volume.
Use the proper amount of coolant
concentrate for the ambient temperature as
specified by the LLC manufacturer. LLC
concentration should be a minimum of 30%
to a maximum of 60%. Too much LLC will
decrease the cooling efficiency. Excessive
use of antifreeze also lowers the cooling
efficiency of the engine. NEVER mix
different types or brands of LLC, as a
harmful sludge may form. Mixing different
brands of antifreeze may cause chemical
reactions, and may make the antifreeze
useless or cause engine problems.
© 2009 Yanmar Marine International
BEFORE YOU OPERATE
39