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Yanmar marine engine 6LPA-STP2, 6LPA-STZP2. Manual - part 11

ENGINE OPERATION

6LPA Series Operation Manual

12/05

For troubleshooting assistance, see
Troubleshooting After Starting on page 69

or Troubleshooting Chart on page 71 . If
necessary, see your authorized Yanmar
dealer or distributor.

REMOTE CONTROL
HANDLE OPERATION

Acceleration and Deceleration

Figure 5

MT-3 Top Mount

Figure 5

1 – Reverse High Speed
2 – Reverse Low Speed
3 – Reverse
4 – Neutral
5 – Forward
6 – Forward Low Speed
7 – Forward High Speed

Figure 6

MV Side Mount

Figure 6

(1)

(2)

(3)

(4)

(5)

(6)

(7)

0004886

(1)

(2)

(3)

(4)

(5)

(6)

(7)

0004887

ENGINE OPERATION

6LPA Series Operation Manual

1 – Forward High Speed
2 – Forward Low Speed
3 – Forward
4 – Neutral
5 – Reverse
6 – Reverse Low Speed
7 – Reverse High Speed

Note: Direction of travel will vary

depending on installation
location.

Use the throttle handle to control
acceleration and deceleration. Move the
handle slowly and smoothly.

Shifting the Engine

WARNING

Sudden Movement Hazard.
The boat will start to move when the
marine drive is engaged:

• Ensure the boat is clear of all

obstacles forward and aft.

• Quickly shift to the FORWARD

position then back to the NEUTRAL
position.

• Observe whether the boat moves in

the direction you expect.

NOTICE

Shifting the marine drive while operating at
high speed or not pushing the handle fully
into position (partial engagement) will
result in damage to marine drive parts and
abnormal wear.

1. Before using the marine drive, be sure

to move the throttle handle to a low idle
position (less than 1000 min

-1

). Move

the throttle handle slowly to a higher
speed position after completing marine
drive engagement.

2. When moving the handle between

FORWARD (Figure 6, (1 to 2)) and
REVERSE (Figure 6, (6 to 7)), bring
the handle to NEUTRAL (Figure 6, (4))
and pause before slowly shifting to the
desired position. NEVER shift abruptly
from FORWARD to REVERSE or vice
versa.

NOTICE

• NEVER shift the marine gear at high

engine speed. During normal
operation, the marine gear should only
be shifted with the engine at idle.

• When sailing, set the remote control

handle in NEUTRAL. Not doing so
WILL introduce slippage or any
damage and void your warranty.

Morse Remote Control Handle
(Optional)

• Move the handle to the NEUTRAL

(middle) position to stop the boat. The
engine will idle at low speed.

• Move the handle to the FORWARD

position to go forward. When the clutch
is engaged in forward, the speed will
decrease.

• Move the handle to the REVERSE

position to go in reverse. When the
clutch is engaged in reverse, the speed
will decrease.

ENGINE OPERATION

6LPA Series Operation Manual

12/05

CAUTIONS DURING
OPERATION

NOTICE

Engine trouble can arise if the engine is
operated for a long time under overloaded
conditions with the control handle in the full
throttle position (maximum engine speed
position), exceeding the continuous rated
output engine speed. Operate the engine
at about 100 min

-1

lower than the full

throttle engine speed.

Note: If the engine is in the first 50

hours of operation, see New
Engine Break-In on page 10

Always be on the lookout for problems
during engine operation.

Pay particular attention to the following:

• Is sufficient seawater being discharged

from the exhaust and seawater outlet
pipe?

If the discharge is small, stop the engine
immediately; identify the cause and
repair.

• Is the smoke color normal?

The continuous emission of black
exhaust smoke indicates engine
overloading. This shortens the engines
life and should be avoided.

• Are there abnormal vibrations or noise?

NOTICE

Excessive vibration may cause damage
to the engine, marine gear, hull and
onboard equipment. In addition, it
causes able passenger and crew
discomfort.

Depending on the hull structure, engine
and hull resonance may suddenly
become great at a certain engine speed
range, causing heavy vibrations. Avoid
operation in this speed range. If you hear
any abnormal sounds, stop the engine
and inspect.

• Alarm buzzer sounds during operation.

NOTICE

If any alarm indicator with audible alarm
sound appears on the display during
engine operation, stop the engine
immediately. Determine the cause and
repair the problem before you continue
to operate the engine.

• Is there water, oil or fuel leakage, or are

there any loose bolts?

Check the engine room periodically for
any problems.

• Is there sufficient diesel fuel in the diesel

fuel tank?

Replenish diesel fuel before leaving the
dock to avoid running out of fuel during
operation.

• When operating the engine at low speed

for long periods of time, race the engine
once every 2 hours.

ENGINE OPERATION

6LPA Series Operation Manual

NOTICE

Racing the engine: With the gear in
NEUTRAL, accelerate from the
low-speed position to the high-speed
position and repeat this process about
five times. This is done to clean out
carbon from the cylinders and the fuel
injection valve. Neglecting to race the
engine will result in poor smoke color
and reduce engine performance.

• If possible, periodically operate the

engine at near maximum engine speed
while underway. This will generate higher
exhaust temperatures, which will help
clean out hard carbon deposits,
maintaining engine performance and
prolonging the life of the engine.

NOTICE

NEVER turn off the battery switch (if
equipped) or short the battery cables
during operation. Damage to the electric
system will result.

SHUTTING DOWN THE
ENGINE

Normal Shutdown

1. Reduce engine speed to low idle and

put remote control handle in NEUTRAL.

2. Accelerate from low speed to high

speed and repeat five times. This will
clean out the carbon from the cylinders
and the fuel injection nozzles.

3. Allow engine to run at low speed

(approximately 1000 min

-1

) without load

for 5 minutes.

NOTICE

For maximum engine life, Yanmar
recommends that when shutting the
engine down, you allow the engine to
idle, without load, for 5 minutes. This will
allow the engine components that
operate at high temperatures, such as
the turbocharger and exhaust system, to
cool slightly before the engine itself is
shut down.

Figure 7

4. With the key in the ON position, push and

hold the STOP button (Figure 7, (1)).
After the engine has stopped, turn the
key awitch to OFF.

(1)

(2)

(3)

(4)

(5)

0004890

Content .. 9 10 11 12 ..