FUEL SYSTEM
FUEL SYSTEM TESTS
Solenoid Valve and Seat Test
Remove solenoid to perform this test. Refer to
Removal
on
p.
146.
Lightly pressurize inlet fitting with alcohol and
syringe.
With
lever
in
run
position, no fluid should enter
inlet fitting.
With
lever
in
prime position, fluid should come out
both inlet fittings.
~--I-2
filled with isopropyl alcohol. Press lightly
on
the
syringe.
\:J--+---+--+--1 Results:
1. Run position
2.
Prime position
Primer Pump Tests
Running Test
(
STEP 1
000897
Start engine and allow
it
to
reach normal operating
temperature.
Set engine speed at 2000
RPM.
While engine
is
running, operate the primer knob
and observe engine speed. Turn engine
OFF.
Results:
• Outboard slows approximately 1000
RPM,
primer circuit
is
functional.
•
No
affect
on
speed, check primer operation.
Proceed to next step.
STEP 2
Remove primer hose(s)
from
intake or carburetor
fitting(s). Connect a 1/8
in.
I.D. clear vinyl hose
between the fitting
and
a Syringe,
PIN
346936,
144
• Fluid moves through passage,
it
is
clear.
• Fluid does not move through passage(s),
or
excessive restriction exists, clean intake or car-
buretor fitting(s) with
Nipple Cleaning
Tool,
PIN
326623, and retest.
Cleaning Tool
6784
Fuel Flow Test
Perform these steps if the primer pump is difficult
to operate or suspected of not working.
m WARNING m
Wear safety glasses when
working
on fuel
systems
to
protect
eyes
from
hazardous
fuel spray.
STEP 1
Remove primer hose from carburetor or intake
manifold fitting and install hose end into a suitable
container to catch the fuel.
Squeeze fuel
tank primer bulb
to
fill carburetor
bowls with fuel and operate primer pump knob
twice.
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