Yanmar 3GM - ENGINE MAINTENANCE AND LUBRICATION

44
5. Start the engine by pushing the start button. while en-
gaging the starter. move the decompression
lever to the
COMPRESSION position. The alarm lights and buzzer
should go ofT.
C AU T IO N
If lhe alarm buzzer or lamps remain on after
the engine starts,
SLOp the engine a nd deter-
mine the cause.
6. Move the speed controllever to the MEDI U~ SPEED
position.
7. Allow the engine to warm for approximately five min-
utes before applying full load to the engine.
S T O P P I ~G Til E E:\'GIl'iE
Note the following items when stopping the engine.
1. Place the transmission in neutral, then allow the engine
to idle for five minutes
bef ore stopping the engine.
2. Momentarily
raise engine speed 10blo wout any resi-
due in the cylinders. then
pullth e engine stop knob or le-
ver.
C AU T ION
Do not Slop the engine us ing the dec ompre s-
sion leve r: D oing so may leave su ffi cie ntf uel
in the cylinders to damag e the engine when
started.
3. Close the scacock. If ambient temperature is below
freezing while the engine is not running,
drain water in
cooling system after engine has cooled.
El\t ER GEN CY El'iGI.'IE S TOP P ING
To safely stop a diesel engine when thc normal stopping
controls are inoperative or ineffective, block
the engine's
air intake. A flat plate is desirable if it will adequately
cover the opening.
A rag may also be used, but do not al-
low the rag to
enter the engine.
PO ST·O PERA TlO~AL CHECKS
Perform the following maintenance after each use.
I. If the boat was used in salt or polluted water, flush the
cooling system with freshwater as described in this chap-
ter. This will minimize corrosion and buildup
of deposi ts
in the cooling system.
2. Disconnect the battery cables from the battery. nega-
tive cable first. Remove the battery from the boat to pre-
'>'e n! theft. if necessary.
3. Shut
off the fuel tank velvets).
CHAPTER THR EE
4. Top offthe fu eltan k(s), i fpo ssiblc. This will minimize
the possibility
of moisture condensation in the tank(s).
5. If water is present in the bilge. either drain it or pump it
dry.
6. Wash the interior and exterior surfaces of the boat with
freshwater.
El'iGI:\IE i\1 i\I I'\ T" : l'i A ~ C E A:'\D LUB R ICA TIO:\l
The maintenance tasks discussed in this section should
be performed at the intervals indicated in Tab le I. These
intervals arc only guidelines, however. Consider the fre-
quency and extentofboat use when establis hing the actual
intervals. Perform the tasks more frequently if the boat is
used under
severe service conditions.
EnJ:inc Oil
Engine oil designed for use indiesel engines must meet
specifications particular to diesel eng ine operat ion. The
Society for Automotive Engineers (SAE) specifies the