164
FUEL SYSTEM
FUEL SYSTEM TESTS
Results:
Normal pressure:
•
Perform the
p. 164. 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
p. 164. 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.
IMPORTANT:
Do not use fuel primer bulb, man-
ual 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. 32 for fuel sup-
ply component requirements.
000243
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Страница 26: ...24 SPECIAL TOOLS NOTES NOTES Technician s Notes Related Documents Bulletins Instruction Sheets Other ...
Страница 82: ...80 MAINTENANCE NOTES NOTES Technician s Notes Related Documents Bulletins Instruction Sheets Other ...
Страница 118: ...116 SYSTEM ANALYSIS NOTES NOTES Technician s Notes Related Documents Bulletins Instruction Sheets Other ...
Страница 180: ...178 OILING SYSTEM OIL RECIRCULATION DIAGRAM OIL RECIRCULATION DIAGRAM 002223 Starboard view Port view ...
Страница 190: ...188 OILING SYSTEM NOTES NOTES Technician s Notes Related Documents Bulletins Instruction Sheets Other ...
Страница 200: ...198 COOLING SYSTEM NOTES NOTES Technician s Notes Related Documents Bulletins Instruction Sheets Other ...
Страница 231: ...POWERHEAD POWERHEAD VIEWS 229 11 POWERHEAD VIEWS Port Short Block Starboard Short Block ...
Страница 232: ...230 POWERHEAD POWERHEAD VIEWS Port Dressed Powerhead Starboard Dressed Powerhead ...
Страница 233: ...POWERHEAD POWERHEAD VIEWS 231 11 Front ...
Страница 234: ...232 POWERHEAD POWERHEAD VIEWS Rear ...
Страница 235: ...POWERHEAD POWERHEAD VIEWS 233 11 Top ...
Страница 236: ...234 POWERHEAD NOTES NOTES Technician s Notes Related Documents Bulletins Instruction Sheets Other ...
Страница 258: ...256 MIDSECTION NOTES NOTES Technician s Notes Related Documents Bulletins Instruction Sheets Other ...
Страница 288: ...286 GEARCASE NOTES NOTES Technician s Notes Related Documents Bulletins Instruction Sheets Other ...
Страница 300: ...298 TRIM AND TILT NOTES NOTES Technician s Notes Related Documents Bulletins Instruction Sheets Other ...
Страница 302: ...S 2 ...
Страница 340: ...A B C 5 1 2 3 6 4 5 1 2 3 6 4 5 1 2 3 6 4 DRC6165R MWS Instrument Wiring Harness 1 2 5 1 2 3 6 7 4 8 A B C ...
Страница 349: ...2008 SC E TEC 75 90 P N 5007527 75 90 HP 5007527 Service Manual ...