If The Engine Fails To Start; Starting At Low Temperatures - Yanmar 3JH5E Operation Manual

ENGINE OPERATION

If the Engine Fails to Start

Before turning the key switch again, be sure
to confirm that the engine has stopped
completely. If an attempt to restart is made
while the engine is running, the pinion gear
of the starter motor will be damaged.
NOTICE: NEVER hold the key in the START
position for longer than 15 seconds or the
starter motor will overheat.
NOTICE: NEVER attempt to restart the
engine if the engine has not stopped
completely. Pinion gear and starter motor
damage will occur.
Note: Hold the key switch for a maximum of
15 seconds in the START position. If the
engine does not start the first time, turn the
key switch OFF and wait for about 15
seconds before trying again. After the
engine has started, do not turn the key
switch OFF. (It should remain on.)
NOTICE: If the vessel is equipped with a
water lift (water lock) muffler, excessive
cranking could cause seawater to enter the
cylinders and damage the engine. If the
engine does not start after cranking for 15
seconds, close the thru-hull water intake
valve to avoid filling the muffler with water.
Crank for 10 seconds at a time until the
engine starts. When the engine does start,
stop the engine immediately and turn the
key switch to the OFF position. Be sure to
re-open the seacock and restart the engine.
Operate the engine normally.
Air Bleeding the Fuel System After
Starting Failure
If the engine does not start after several
attempts, there may be air in the fuel system.
If air is in the fuel system, fuel cannot reach
the fuel injection pump. Bleed the air out of
the system. See Bleeding the Fuel System
on page 35.
48

Starting at Low Temperatures

Comply with local environmental
requirements. Use engine heaters to avoid
starting problems and white smoke. Do not
use starting aids. NOTICE: NEVER use an
engine starting aid such as ether. Engine
damage will result.
To limit white smoke, run the engine at low
speed and under moderate load until the
engine reaches normal operating
temperature. A light load on a cold engine
provides better combustion and faster
engine warm-up than no load.
Avoid running the engine at idling speed any
longer than necessary.
Starting with Air Heater (If
Equipped)
1. Open the seacock (if equipped).
2. Open the fuel tank cock.
3. Put remote control handle in NEUTRAL.
4. Turn the battery master switch (if
5. Turn key switch to GLOW for 15
6. Turn key switch to ON. Ensure that the
Note: The coolant high temperature alarm
indicator does not come on during start-up.
7. Turn key switch to START. Release the
© 2009 Yanmar Marine International
equipped) to ON.
seconds.
instrument panel indicators light and the
alarm sounds. This shows that
indicators and alarm are working
correctly.
key switch when the engine has started.
The alarm should stop and the
indicators should go out. NOTICE:
NEVER hold the key in the START
position for longer than 15 seconds or
the starter motor will overheat.
JH Series Operation Manual