movie 125 euro 3 Workshop-manual : Page 190

          18. MOVIE CARBURETOR EURO 3
                                                                               MOVIE SYSTEM


 TROUBLESHOOTING
 Engine does not start                            Engine idles roughly, stalls or runs poorly
 · No fuel in tank                                · Incorrect idle speed
 · Restricted fuel line                           · Rich mixture
 · Too much fuel getting to cylinder              · Lean mixture
 · Clogged air cleaner                            · Clogged air cleaner
 · Contaminated fuel                              · Intake air leak
 · Faulty fuel pump                               · Contaminated fuel
                                                  · Faulty air-cut off valve
                                                  · Damaged vacuum tube and connectors
                                                  · Damaged carburetor insulator


 Throttle does not open fully, so engine stalls   Rich mixture
 · Damaged vacuum piston diaphragm                · Auto bystarter valve opens excessively
 · Clogged diaphragm hole                         · Faulty float valve
                                                  · Float level too high
 Lean mixture                                     · Clogged air jets
 · Clogged fuel jets                              · Auto bystarter valve set plate installed in
 · Clogged fuel tank cap breather hole              the wrong groove
 · Clogged fuel filter                            ·Clogged air cleaner
 · Bent, kinked or restricted fuel line
 · Faulty float valve
 · Float level too low
 · Faulty fuel pump or insufficient output


 Engine is hard to start
 · No fuel in tank
 · Restricted fuel line
 · Clogged fuel strainer
 · Faulty fuel pump
 · Broken or clogged vacuum tube
 · Faulty or clogged charcoal canister

 Lean mixture
 · Clogged charcoal canister
 · Bent, kinked or restricted fuel line
 · Clogged fuel strainer
 · Float level too low




18-3