Yanmar 6LPA-STP2 Operation Manual page 49

2. MT-3: Pull out the handle lever
(Figure 3, (4)) and adjust the speed to
no more than 1500 rpm and run the
engine at low speed with no load.
3. MV: Pull out the free throttle button
(Figure 4, (4)) and adjust the speed to
no more than 1500 rpm and run the
engine at low speed with no load.
4. Allow engine to run for approximately 5
minutes.
Check the following items at a low engine
speed:
• Check that the gauges, indicators and
alarm are normal.
• Check for water, fuel or oil leakage from
the engine.
• Check that the exhaust color, engine
vibration and sound are normal.
• When there are no problems, keep the
engine at low speed with the boat still
stopped to distribute engine oil to all parts
of the engine.
• Check that sufficient cooling water is
discharged from the seawater outlet pipe.
Operation with inadequate seawater
discharge will damage the impeller of the
seawater pump. If seawater discharge is
too low, stop the engine immediately.
Identify the cause and repair. NOTICE:
The engine will seize if it is operated
when cooling seawater discharge is
inadequate or if load is applied
without any warm-up operation.
For troubleshooting assistance, see
Troubleshooting After Starting on page
71 or Troubleshooting Chart on page
73.
If necessary, see your authorized Yanmar
dealer or distributor.
6LPA Series Operation Manual
When operating the engine at low speed
for long periods of time, race the engine
once every 2 hours. Racing the engine:
with the clutch 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 valves. NOTICE:
Neglecting the race the engine will
result in poor exhaust color and reduce
engine performance.
Periodically operate the engine near
maximum speed while underway. This
will generate higher exhaust
temperatures, which will help clean out
hard carbon deposits, maintain engine
performance and prolong the life of the
engine.
© 2007 Yanmar Marine International
ENGINE OPERATION
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