BREAK-IN
PROCEDURE
THE
FIRST
50
HOURS
Although
your
engine
has
experienced
a
minimum
of
one
hour
of
test
operations
to
ensure
accurate
assembly
and
proper operation
of
all systems, break-in time is required.
The service life
of
your engine is dependent upon how the
engine is operated and serviced during its initial
50 hours
of
use,
Your
new
engine
requires
approximately
50
hours
of
initial
conditioning
operation
to
break
in
each
moving
part
in
order
to
maximize
the
performance
and
service life of
the
engine.
Perform this conditioning carefully, keeping in mind the
following:
1.
Start the engine according
to
the Starting Procedure
section in this manual; run the engine at fast idle while
checking that all systems (raw water pump, oil pressure,
battery charging) are functioning.
2.
Allow the engine to warm up (preferably
by
running at fast
idle) until the water temperature gauge moves into the
130° -1400P range.
3.
While using the vessel, run the engine at varying engine
rpms for the
first 25 hours.
4.
Avoid rapid acceleration, especially with a cold engine.
S.
Use
caution
not
to
overload
the
engine.
The
presence
of a
gray or black exhaust, and the inability
of
the engine
to
reach its full rated rpm, are signs
of
an overload.
6. During the next 25 hours, the engine may be operated at
varying engine rpms, with short runs at full rated rpm.
Avoid prolonged idling during this break-in period.
10
Breaking-in a new engine basically involves seating the
piston rings
to
the cylinder walls. This cannot be accomplished
by long periods
of
running at idle, nor by early running at
full
rpm. Idle running may glaze the cylinder walls, resulting in
excessive
oil
consumption
and
smoky
operation.
Excessive
speed or heavy over-loading, especially with a cold engine,
may cause scoring
of
the cylinder walls, producing similar
results. Operate the engine in moderation during the
50-hour
break-in period. (Don't baby the engine, but
do
not abuse it.)
RECOMMENDED
RPM
RANGES
MODEL
IDLE
CRUISE
MAXIMUM
RPM RPM RPM
M3-20B
1000
-1200
2500
-
3000
3500
-
3600
M25XPB
1000
-1200
2000
-
2500 2900
-
3000
M35B
800
-
1000
2000
-
2500 2900
-
3000
M40B
800
-
1000
2000
-
2500
2900
-
3000
M50B
800
-1000
2000
-
2500 2700
-
2800
NOTE:
Attempting
to
reduce idle speed below the minimum
shown may produce unstable engine operation and stalling.
NOTE:
The propeller should be either 2
or
3 blade. It should
allow the engine to reach its maximum rated rpm
at
full open
throttle underway in forward gear
to
ensure the availability
of
rated horsepower when needed.
NOTE:
See the 1RANSMISSION section
of
this manual
for
break-in information
on
your
transmission.
To Next Page
Loading...
Need help?
General
