Spark Plugs; Submerged Outboard - Evinrude 30 HORSEPOWER MFE Operator's Manual

5) Turn on the water. Keep the water pres-
sure between 20 and 40 psi (140 to
300kPa).
6) Start the engine and RUN AT IDLE
SPEED. Flush engine for at least five min-
utes. A steady stream of water must flow
from exhaust relief port of outboard.
1
1. Flushing device
2. Stream of water
3) Turn engine OFF. Remove tape from aux-
iliary water inlet holes on each side of the
gearcase.
4) Leave the outboard in vertical position long
enough to completely drain the power-
head.

Spark Plugs

CAUTION
The ignition system presents a serious
shock hazard. Use caution to avoid
injury from shock or injury resulting
from your reaction to shock. Do not han-
dle primary or secondary ignition com-
ponents while the engine is cranking or
running.
NOTICE
Replacement spark plugs MUST be
indexed correctly. Incorrect spark plug
maintenance can lead to engine damage.
Spark plugs should be serviced by qualified
personnel. Incorrect spark plug maintenance
can lead to engine damage.
Marine Engine Duty Cycles
The International Council of Marine Industry
Associations (ICOMIA) Standard No. 36-88
specifies a marine engine duty cycle based on
documented studies. A duty cycle is a profile
of engine running and usage. This duty cycle
is used to determine average spark plug lon-
gevity and maintenance requirements for
Evinrude E-TEC outboards.
2
ICOMIA Marine Engine Duty Cycle
Engine Speed as
Percentage of Rated
Speed (RPM)
IDLE
40%
60%
80%
008032
100%
Some running profiles and conditions
can lead to spark plug wear sooner than
expected. Depending on your specific
usage, the spark plug maintenance
schedule may require adjustment.

Submerged Outboard

If your outboard has been under water, refer
to Engine De-Water on page 34.

Time at Specified
RPM (Percentage of
total engine running
time)
40%
25%
15%
14%
6%
NOTICE
Service
47