Honda BF135A - Engine Is Hard to Start; Fuel System

2-28
BF135A•BF150A
e. FUEL SYSTEM
• ENGINE IS HARD TO START
• When the gasoline is flowing out of the vapor separator, check the vapor separator (P. 5-112 thru. 5-120).
• Check for short in the wire
harness between the No. 2
(10A) fuse and the fuel
pump. Replace or repair the
wire harness as necessary.
• Replace the No. 2 (10A)
fuse.
Replace the PGM-FI main
relay.
Turn the ignition switch ON and check
the fuel pump operation.
Is there the operation sound for 2 sec-
onds after the ignition switch is ON?
NO
NO
NO
NO
YES
YES
Ye s
To P. 2-29 (A)
YES
To P. 2-29 (B)
Check for open circuit in the fuel
pump ground line.
1 Turn the ignition switch OFF and
disconnect the fuel pump 2P con-
nector.
2 Check for continuity between the
No. 2 (Black/White) terminal of the
harness side 2P connector and
the engine ground.
Is there continuity?
Replace or repair the wire har-
ness (Open circuit in the
ground line).
Check the No. 2 (10A) fuse.
Is the fuse normal?
Check the PGM-FI main relay.
Is the PGM-FI main relay normal?
Fuel pump
harness side
2P connector
Viewing from
terminal side