13-2 CARBURETOR GRAND DINK125/150DINK125B&W125 TROUBLESHOOTING Engine idles roughly, stalls or runs poorly Engine does not start Incorrect idle speed No fuel in tank Incorrect idle speed Rich mixture Restricted fuel line Rich mixture Lean mixture Too much fuel getting to cylinder Clogged air cleaner Clogged air cleaner Intake air leak Contaminated fuel Contaminated fuel Faulty fuel pump 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 Clogged air jets Auto bystarter valve set plate installed in Lean mixture the wrong groove Clogged fuel jets Clogged air cleaner Clogged fuel tank cap breather hole Clogged fuel filter 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 13-2-3