SPARK PLUGS
PROPELLER
WARNING
WARNING
The ignition system presents a serious
shock hazard. The primary circuit operates
in excess of 250 volts; the secondary circuit
operates in excess of 25,000 volts. Use cau-
tion to avoid injury from shock or injury
resulting from your reaction to shock. Do
not handle primary or secondary ignition
components while the engine is cranking or
running.
To avoid accidental starting of engine while
changing propellers, twist and remove all
spark plug leads.
IMPORTANT: Apply Triple-Guard grease to the en-
tire propeller shaft before installing the propeller. At
least annually, remove the propeller and check for
debris. Clean the shaft and regrease it before rein-
stalling a propeller.
Inspect spark plugs periodically. Replace if elec-
trodes are badly worn, insulators are cracked, or if
they are badly fouled.
Installation
1)
2)
3)
Install the stopper on the shaft.
Slide the propeller onto the shaft.
Insert the cotter pin and bend its ends over to
lock in place.
To remove spark plugs, twist and remove all spark
plug leads. Unscrew spark plug from cylinder head.
To install spark plugs, wipe spark plug seats clean
with a clean rag. Install spark plugs finger tight, then
tighten to specified torque. Refer to Engine Speci-
fications.
IMPORTANT: Avoid engine damage by installing
spark plugs into COOL cylinder head and not over-
tightening.
Before installing the spark plug lead, apply a light
coat of Triple-Guard grease to the ribbed portion of
the spark plug. This will help prevent corrosion be-
tween the spring terminal and the spark plug.
4
3
2 1
1.
2.
3.
4.
Stopper
Shaft
Propeller
Cotter pin
Repair
If your propeller hits a solid object, the impact is par-
tially absorbed by the rubber bushing in the hub to
help prevent damage to the engine. A strong impact
can damage the hub and propeller blades. Damage
to blades can cause unusual and excessive vibra-
tion. Damage to the hub can cause excessive en-
gine RPM with little forward movement.
1.
Ribbed portion of the spark plug
IMPORTANT: Avoid or limit operation using a dam-
aged propeller. Carry a spare propeller.
Keep your propeller in good condition. Use a file to
smooth slight damage to blade edges. See your
Dealer for repair of serious damage.
34
- 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 2.5 hp, Johnson R4 |
| Model Year | 2007 |
| Download File |
|
| Document File Type | |
| Publisher | johnson.com |
| Wikipedia's Page | Johnson Outboards |
| Copyright | Attribution Non-commercial |
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