Johnson J30MLSRC User Manual

ENGINE TEMPERATURE
CHECK
Temperature Gun, PIN 772018, or a digital pyrom-
eter
should be used to accurately determine the
engine's operating temperatures.
Temperature Gun DR6825
To achieve accurate and consistent readings,
engine temperature must be gauged at the top of
cylinder head.
IMPORTANT: For the following engine operat-
ing temperatures and
RPM figures to be correct,
the
inlet water temperature must be 70° ± 10°F
(21 ° ± 3°G).
STEP 1
Install correct test propeller and place outboard in
a test tank.
~ WARNING ~
To prevent accidental starting of engine
while changing
propellers, twist and
remove
all spark plug leads.
Start outboard and run at 3000 RPM for at least
five minutes.
POWERHEAD
ENGINE TEMPERATURE CHECK
Reduce engine speed to 900 RPM. At 900 RPM,
the
digital pyrometer or Temperature Gun should
indicate 140° ± 15 °F (60° ± rG) when checking at
top of the
cylinder head.
Model
IDLE
Temperature
ALL
If engine temperature is not within this range, trou-
bleshoot cooling system to determine problem.
STEP
2
Increase engine speed to 5000 RPM . At 5000
RPM, the digital pyrometer must not indicate more
than
160°F (71 0 G) .
Model WOT Temperature
ALL
Maximum 160°F (71 ° C)
If engine temperature exceeds 160°F (71 ° C) , trou-
bleshoot cooling system to determine problem.
17212
IMPORTANT: If you get low or inaccurate read-
ings during these tests, coat the probe
location
with a liberal amount of Wakefield Heat Sink Com-
pound,
PIN 322170.
173
I

Johnson J30MLSRC Specifications

General

Brand	Johnson
Model	J30MLSRC
Category	Outboard Motor
Language	English