3)
Hold a suitable container under the oil drain
screw. Remove the screw and drain the re-
servior. Before you reinstall the screw, re-
place the gasket with a new one. Reinstall the
screw and tighten it securely.
ADJUSTMENTS
Trim Tab
WARNING
Improper trim tab adjustment can cause dif-
ficult steering.
1
The trim tab is also an anti-corrosion anode.
Disintegration of the anode can effect boat
handling and performance. Make sure the
trim tab is in good condition and adjust
properly.
A propeller will generate steering torque when the
propeller shaft is not running parallel to the water’s
surface. The trim tab is adjustable to compensate
for this steering torque.
1. Oil drain screw
4)
Pour the recommended oil into the oil fill until
it reaches the upper mark on the dipstick. Re-
fer to Engine Specifications for crankcase
capacity.
Replace the oil fill cap and clean any spilled
oil off the engine and your skin.
IMPORTANT: A single trim tab adjustment will re-
lieve steering effort under only one set of speed,
motor angle and load conditions. No single adjust-
ment can relieve steering effort under all speed,
motor angle and load conditions. If the boat pulls to
the left or right when its load is evenly distributed,
adjust the trim tab as follows:
With the motor shut OFF, loosen the trim tab
screw. If the boat pulled to the right, move the rear
of the trim tab slightly to the right. If the boat pulled
to the left, move the rear of the trim tab slightly to
the left.
5)
6)
7)
Reinstall the upper cover.
Supply water to the cooling system and run
the engine at idle to check for leaks, especial-
ly around the oil filter, drain screw and oil fill
cap. Correct any problems.
Stop the engine and recheck crankcase oil
level using the dipstick. Add oil as indicated.
8)
1.
2.
Add
Full
Tighten the trim tab screw to a torque of 11 to 15 ft.
lbs. (15 to 20 N·m).
Test the boat and, if needed, repeat the procedure
until steering effort is as equal as possible.
Dispose of used oil in a reasonable manner follow-
ing all local regulations.
High motor installations — The trim tab might
be above the water when the motor is trimmed out.
Steering effort might increase. Steering effort will
be reduced if you trim the motor in and submerge
the trim tab.
38
- Maintenance
| 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