144
FUEL SYSTEM
FUEL SYSTEM TESTS
Results:
Normal pressure:
•
Perform the
Make sure no air leaks or restrictions exist in
the fuel supply hose or boat fuel system.
Low pressure:
•
Check pulse hoses and fittings for restrictions.
•
Perform the
Make sure no air leaks or restrictions exist in
the fuel supply hose or boat fuel system.
•
Check fuel flow through fuel lift pump. Use fuel
primer bulb to force fuel through pump.
No pressure:
•
Check pulse hoses and fittings restrictions.
•
Check fuel flow through fuel lift pump. Use fuel
primer or primer bulb to force fuel through
pump.
•
Momentarily prime or squeeze primer bulb to
check gauge operation.
•
Check pulse hose and fittings for restrictions.
Lift Pump Vacuum Test
Confirm fuel supply to the fuel lift pump.
Temporarily install a vacuum gauge, T-fitting, and
8 in. (20.3 cm) of clear vinyl hose between the fuel
supply hose and fuel lift pump (inlet). Secure con-
nections with tie straps to prevent fuel or air leaks.
Do not use fuel primer bulb, manual
fuel primer, or electric fuel pump primer to
restart outboard. A positive pressure in the
fuel supply could damage some vacuum
gauges.
START outboard and run at FULL THROTTLE for
at least two minutes. Monitor clear vinyl hose for
the presence of air. Air bubbles indicate a faulty
hose, connection, or fuel tank pick-up. Repair, if
necessary, before proceeding.
There should be no air or vapor bubbles visible in
the clear hose. The maximum inlet fuel vacuum
should not exceed 4 in. Hg. (13.5 kPa) at the inlet
to the fuel lift pump under any operating condi-
tions (IDLE to WOT).
A higher vacuum indicates an excessive restric-
tion in the fuel supply. Repair as needed. Refer to
on p. 134 for
fuel supply component requirements.
000243
NOTICE
Содержание EVINRUDE E-TEC BE50DPLABA
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Страница 230: ...230 POWERHEAD POWERHEAD VIEWS 2 Cylinder Top 008162...
Страница 231: ...POWERHEAD POWERHEAD VIEWS 231 10 2 Cylinder Top Rope Start Models 008186...
Страница 232: ...232 POWERHEAD POWERHEAD VIEWS 3 Cylinder Port Hose Routings 3 Cylinder Starboard Hose Routings 006760 006761...
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Страница 234: ...234 POWERHEAD POWERHEAD VIEWS 3 Cylinder Front 008166...
Страница 235: ...235 POWERHEAD POWERHEAD VIEWS 10 3 Cylinder Rear 008167...
Страница 236: ...236 POWERHEAD POWERHEAD VIEWS 3 Cylinder Top 008165...
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Страница 372: ...372 MANUAL STARTER NOTES NOTES Technician s Notes Related Documents Bulletins Instruction Sheets Other...
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