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

ENGINE OPERATION

If the Engine Fails to Start

Before pushing the start 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.
Never hold for longer than 15 seconds or
the starter motor will overheat.
Never attempt to restart the engine if the
engine has not stopped completely. Pinion
gear and starter motor damage will occur.
Note: Push and hold the start switch
for a maximum of 15 seconds. If
the engine does not start the first
time, wait for about 15 seconds
before trying again.
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 off
the power switch. Be sure to re-open the
seacock and restart the engine. Operate
the engine normally.
52
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 38.

Starting at Low Temperatures

Comply with local environmental
requirements. Use engine heaters to avoid
starting problems and white smoke. Do not
use starting aids.
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.
JH Series Operation Manual