3)
Start the water — keep pressure between 20
to 40 psi (140 to 300 kPa). Flush the engine
for five minutes.
Turn off the water, remove the hose and con-
nector (if used) and reinstall flushing plug.
Leave the outboard in vertical position long
enough to completely drain the powerhead.
OVER-REVOLUTION LIMITING SYSTEM
This system is activated when engine speed ex-
ceeds maximum recommended speed for more
than 10 seconds.
If this system activates, engine speed will automat-
ically be reduced to approximately 3000 RPM.
4)
5)
This system must be reset by moving the throttle to
the idle position for about one second to restore full
engine operation.
LOW OIL PRESSURE WARNING
Should crankcase oil pressure drop to a danger-
ously low level during engine operation, the low oil
pressure light will come on.
IMPORTANT: The Over-Revolution Limiting Sys-
tem will not be activated at recommended maxi-
mum throttle unless propeller pitch is insufficient or
other factors (like “over-trimming” or “ventilation”)
prevail.
If the system activates for no apparent reason, see
your DEALER.
1
ENGINE OVERHEATING
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 intake 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
must discharge a steady stream of water. Check
the indicator often, especially when operating in
weeds, muddy and debris-laden water, at extreme
trim angles, or in shallow water drive (if equipped).
1.
Low oil pressure light
If the low oil pressure light is on, the engine speed
will not exceed 2000 RPM (FAST idle).
If, during operation, your engine slows itself to fast
idle and will not exceed that pace, shut OFF the en-
gine.
If tilted, place the engine in vertical position.
Check the oil level on the dipstick and add oil, if
needed. Refer to Crankcase Oil and Engine
Specifications.
Examine the oil fill cap and drain screw for evidence
of oil leakage and make sure they are tight.
If the dipstick shows the oil level is okay, leave the
engine upright and shut off for ten minutes, then
start it. If the engine still limits itself to about 2000
RPM, see your DEALER.
1
Reset - After oil pressure has been restored, oper-
ate the engine below 1500 RPM to reset the
warning system for normal operation.
The light will come on for a few seconds after the
engine starts. This verifies the warning system is
working.
If the light does not come on, stop the engine and
see your DEALER.
If the light stays on, check the engine oil level and
add oil if necessary.
If the oil level is correct, see your DEALER.
1.
Water pump indicator
If the engine overheats, the S.L.O.W. (Speed Limit-
ing Overheat Warning) protection system will im-
mediately 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.
IMPORTANT: If you operate the engine with this
light on, severe engine damage can result. Do not
rely on the low oil pressure light to indicate the need
to add oil. Be sure to periodically check the engine
oil level. If the oil level is low, severe engine dam-
age can result.
Operation - 29
| Categories | BRP Brand Manuals, Johnson 4-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 PL4 |
| Model Year | 2004 |
| Download File |
|
| Document File Type | |
| Publisher | johnson.com |
| Wikipedia's Page | Johnson Outboards |
| Copyright | Attribution Non-commercial |
(1 votes, average: 4 out of 4)
Marine readers have rated 2004 Johnson 25 30 hp PL4 4-Stroke Outboard Owners Manual 4.0 out of 4.0 based on 1 product reviews. Handy as a manual didn't come with my boat