ENGINE OVERHEATING
IF the S.L.O.W. protection system activates and the
stream from the water pump indicator becomes in-
termittent or stops, reduce speed to idle and:
IMPORTANT: Do not run your engine — even for a
brief start-up — without supplying water to it. Refer
to Flushing.
While boating, the engine’s water intakes must stay
completely submerged and unobstructed. Observe
proper transom height and trim angle. While the en-
gine is running, the engine’s water pump indicator
•
• SHUT OFF the engine;
Shift to NEUTRAL;
•
•
Tilt the motor up;
Clean the intake screens and four small gearcase
holes of any blockage;
• Clean the water pump indicator of any blockage;
must discharge a steady stream of water. Check • Lower the motor; and
the indicator often, especially when operating in
weeds, muddy and debris-laden water, and at ex-
treme trim angles.
•
Restart the engine and run at idle.
IF cleaning the screens and indicator does not re-
store the water pump indicator’s steady discharge,
SHUT OFF the engine and do not attempt to oper-
ate it. See your DEALER.
IF cleaning the screens and indicator does restore
the water pump indicator’s steady discharge, you
might have to run for two minutes in NEUTRAL to
allow the engine to cool and the light to go off.
If the warning light stays on after two minutes,
STOP the engine and see your DEALER.
IMPORTANT: You must restore cooling to the en-
gine to avoid serious engine damage.
After any overheat, have your DEALER:
Torque the cylinder head screws.
Inspect the water pump for excessive wear or dam-
age.
Inspect the thermostats.
1.
2.
Water intake screens
Water pump indicator
Inspect the engine for leaks.
If the engine overheats, its System Check engine
monitor will sound the warning horn and turn on the
"WATER TEMP" or HOT light (if equipped). Also,
the S.L.O.W. protection system will immediately
limit the engine speed to 2000 RPM. If the engine
was running faster than 2000 RPM when the
S.L.O.W. system activated, it will shake noticeably.
To RESET the S.L.O.W. protection system, the en-
gine must be shut OFF and the cooling temperature
restored.
Operation - 29
| Categories | BRP Brand Manuals, Johnson 2-Stroke Manuals, Johnson Brand Manuals, Johnson Outboard Manuals |
|---|---|
| Document Type | Boat Motor Manual. Marine Operator's Engine Guide. |
| Tags | Johnson 25 hp, Johnson 30 hp, Johnson E, Johnson EL |
| Model Year | 2004 |
| Download File |
|
| Document File Type | |
| Publisher | johnson.com |
| Wikipedia's Page | Johnson Outboards |
| Copyright | Attribution Non-commercial |
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