Checking Fuel System - Outboards Group 2.5A Owner's Manual

Maintenance
should periodically remove and inspect the
spark plug because heat and deposits will
cause the spark plug to slowly break down
and erode. If electrode erosion becomes ex-
cessive, or if carbon and other deposits are
excessive, you should replace the spark plug
with another of the correct type.
Standard spark plug:
BR6HS-10
Before fitting the spark plug, measure the
electrode gap with a wire thickness gauge;
adjust the gap to specification if necessary.
1. Spark plug gap
2. Spark plug I.D. mark (NGK)
Spark plug gap:
0.9–1.0 mm (0.035–0.039 in)
When fitting the plug, always clean the gasket
surface and use a new gasket. Wipe off any
dirt from the threads and screw in the spark
plug to the correct torque.
Spark plug torque:
25.0 Nm (18.4 ft-lb) (2.55 kgf-m)
NOTE:
If a torque-wrench is not available when you
are fitting a spark plug, a good estimate of the
correct torque is 1/4 to 1/2 a turn past finger-
31
tight. Have the spark plug adjusted to the cor-
rect torque as soon as possible with a torque-
wrench.

Checking fuel system

WARNING
Gasoline and its vapors are highly flam-
mable and explosive. Keep away from
sparks, cigarettes, flames, or other sourc-
es of ignition.
WARNING
Leaking fuel can result in fire or explosion.
Check for fuel leakage regularly.

If any fuel leakage is found, the fuel sys-

tem must be repaired by a qualified me-
chanic. Improper repairs can make the
outboard unsafe to operate.
Check the fuel lines for leaks, crack, or mal-
function. If a problem is found, your Outboards
dealer or other qualified mechanic should re-
pair it immediately.
Checkpoints
Fuel system parts leakage

Fuel line joint leakage

Fuel line cracks or other damage

Fuel connector leakage
