If The Engine Fails To Start; After The Engine Has Started - Yanmar 6LY3-STC Operation Manual

ENGINE OPERATION

If the Engine Fails to Start

Before pressing the Start switch again,
confirm that the engine has stopped
completely. If the engine is restarted before
it has completely stopped, the starter motor
pinion gear will be damaged.
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.
36

After the Engine has Started

After the engine has started, check the
following items at a low engine speed:
1. Check that the indicators on the display
and the control head are normal.
2. Check for water or oil leakage from the
engine.
3. Check that exhaust color, engine
vibrations, and sound are normal.
4. When there are no problems, keep the
engine at low speed to send engine oil to
all parts of the engine.
5. Check that sufficient seawater is
discharged from the seawater / exhaust
outlet pipe. Operation with inadequate
seawater discharge will damage the
impeller of the seawater pump. If
seawater discharge is too small, stop the
engine immediately. Identify the cause
and repair.
• Is the seacock open?
• Is the inlet of the seacock on the hull
• Is the seawater suction hose broken, or
CAUTION! The engine will seize if it is
operated when seawater discharge is
too small or if load is applied without any
warming up operation.
6LY3 LDC Operation Manual
© 2008 Yanmar Marine International
bottom clogged?
does the hose suck in air due to a loose
joint?