6S35H11
4-14
9
8
7
6
5
4
3
2
1
Fuel pump
Checking the fuel pump
1.
Place a drain pan under the fuel hose
connections, and then disconnect the
fuel hoses from the fuel pumps.
2.
Connect the special service tool to the
fuel pump inlet.
3.
Cover the fuel pump outlet with a finger,
and then apply the specified positive
pressure. Check that there is no air leak-
age.
4.
Apply the specified negative pressure
and check that there is no air leakage.
5.
Connect the special service tool to the
fuel pump outlet.
6.
Apply the specified positive pressure and
check that there is no air leakage.
Disassemble the fuel pump if necessary.
Disassembling the fuel pump
1.
Disconnect the inlet and outlet hose from
the fuel pumps.
2.
Remove the 2 bolts
1
securing the
pumps to the crankcase.
3.
Remove the 3 screws securing the pump
together. Refer to exploded diagram
P4-13.
NOTE:
Take care to let the spring fly out or lose the
plate.
4.
Check the diaphragms for tears or dam-
age. Replace the diaphragms if neces-
sary.
5.
Check the valves for bends or damage.
Replace the valve if necessary. Also,
check the fuel pump bodies and springs
for damage. Replace the fuel pump bod-
ies and springs if necessary.
6.
Clean the fuel pump bodies.
6G440020
6G440010
6G440030
Vacuum/pressure pump gauge set:
90890-06756
Specified pressure:
50 kPa (0.5 kgf/cm
2
, 7.3 psi)
Specified pressure:
50 kPa (0.5 kgf/cm
2
, 7.3 psi)
Specified pressure:
30 kPa (0.3 kgf/cm
2
, 4.4 psi)
1
1
6S340155
6S35H11_04 9/9/05 1:23 PM Page 15
Summary of Contents for 250GETO
Page 1: ...L250G SERVICE MANUAL 6S3 28197 5H 116 250G 250G L250G ...
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Page 135: ... MEMO 9 8 7 6 5 4 3 2 1 6S35H11 5 48 ...
Page 201: ...6S35H11 6 64 9 8 7 6 5 4 3 2 1 MEMO ...
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Page 292: ...YAMAHA MOTOR CO LTD Printed in Japan Aug 2005 1 4 1 E_2 Printed on recycled paper 250G L250G ...