Fuel System - Honda CH250 Elite 1986 Service Manual

FUEL SYSTEM
TROUBLESHOOTING
lean
mixture
CI()gS;Ied fuel jets
Stuck vacuum piston
Faulty float valve
Low float level
Blocked fuel cap vellt
Clogged fuel strainer screen
Restricted fuel line
Clogged air vent tube
Intake air leak
,nnll ,elf1
system
l
Engine cranks but won't start
No fuel in tank
No fuel to carburetor
Engine flooded with fuel
No spark at
CI()g~led
air cleaner
Intake air leak
Im!JfOlper auto
hv~,t:::"·t,,r
opElration
ImlJrolper throttle operation
Hard or stalling after startll1lg
Imlnolper auto operation
malfunction
carburetor
• Contaminated fuel
• Intake air leak
• Incorrect idle speed
Rich mixture
• Clogged air
float valve
• Float level too high
• Faulty auto bystarter
air cleaner
Rough idle
system
• Incorrect idle speed
• Faulty carburetor
• Contaminated fuel
acceleration
system
igniticln system
carburetor
perfo!rmllilfllce ldrivabilityl and poor fuel economy
GI()Ql;led fuel system
system
4-2