Cooling System - Evinrude E-Tec 40 HP Service Manual

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ROUTINE SERVICE

COOLING SYSTEM

Tachometer Pulse Setting
(SystemCheck)
Confirm accuracy of tachometer reading.
Adjust dial on back of t achometer to required
setting (the outboard should not be running).
Outboard Model
40–90 HP
Water Pump Overboard Indicator
A steady stre am o f water should flow from
overboard indicator.
1. Water pump overboard indicator
Operating Temperature
An outboard run at id le speed sh ould achieve a
temperature base d on the engine' s thermost atic
control. In gene ral, the powerhea d temperature
should reach at least 104°F (40°C) after five min-
utes of idling. Check that the powerhea d reaches
idle temperature. Refer to SERVICE SPECIFICA-
TIONS on p. 10.
Idle Speed
Make sure the outboard idles within the specified
idle RPM ra nge. If th e outboard is run on a flush-
ing device, the idle speed and qu ality may no t be
representative of actual in water use.
34
Tachometer Setting
6 Pulse or 12 Pole
the
1
008469
COOLING SYSTEM
Regularly inspect cooling system components for
corrosion, damage, leaks, or restrictions:
water intake screens
water pump
all internal water passages
thermostats
all external water hoses and fittings
vapor separator cooling passages and fittings
EMM cooling passages and fittings
overboard water pressure indicator.
Water Intake Screens
Inspect condition of water int ake scre ens. Clean
or replace as needed.
Confirm function of overboard water pressure indi-
cator.
1
1. Water intake screen
2. Overboard indicator
2
001212
008470

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