13. FUEL SYSTEM/CARBURETOR/ FUEL PUMP/ FUEL TANK PEOPLE/PEOPLE S 250 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 13-6