Engine Temperature Check; Software Method; Pyrometer Method - BRP Evinrude E-Tec Series Service Manual

COOLING SYSTEM

ENGINE TEMPERATURE CHECK

ENGINE TEMPERATURE
CHECK
The engine temperatures listed
IMPORTANT:
below are based on an intake water temperature
of 70° ± 10°F (21° ± 3°C).
CAUTION
When servicing the propeller, always shift
the outboard to NEUTRAL, turn the key
switch OFF, and twist and remove all
spark plug leads so the engine cannot be
started accidentally.
Install correct test propeller and place outboard in
a test tank or in the water. Start outboard and run
at 3000 RPM in FORWARD gear for at least five
minutes.
Reduce outboard speed and run engine at IDLE
for five minutes. Check IDLE operating tempera-
ture.
Increase outboard speed to 5000 RPM and check
temperature.
Check temperature on both sides of powerhead. If
engine temperature is not within range, trouble-
shoot cooling system. Remember, running out-
boards at high speeds in test tanks may disrupt
water flow to water intakes of the gearcase. Make
sure the outboard has adequate water flow.
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Software Method

Use the Evinrude Diagnostics Software program.
Observe temperature displays for port and star-
board temperature sensors.
Engine Monitor Screen
Typical temperature displays at IDLE speed
should be 160°F ± 20°F (71°C ± 11°C).
Typical temperature displays at WOT speed
should be 120°F ± 20°F (50°C ± 11°C).
At 5000 RPM, operating temperature must not
exceed 194°F (90°C).

Pyrometer Method

Use a Temperature Gun, P/N 772018, or a digital
pyrometer to accurately determine the outboard's
operating temperature.
Position infrared beam or pyrometer pickup on the
thermostat housing at the top of cylinder head.
Check temperature on both sides of powerhead.
Temperature Gun, P/N 772018
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