Yamaha MZ250 Service Manual page 108

ENGINE
ENGINE DOES NOT START
Check that the oil warning light comes on by pull-
ing the starter rope.
LIGHTS ON
Check the engine oil level.
SUFFICIENT
Check the fuel level.
SUFFICIENT
Check if fuel has deteriorated.
GOOD
Check if the fuel tank cap is clogged.
GOOD
Check the fuel cock lever position.
"ON"
Check if fuel flows to fuel cock.
FLOW OK
TROUBLESHOOTING
DOSE NOT LIGHT
Check the connections between the oil warning
unit and oil level switch.
GOOD
INSUFFICIENT
INSUFFICIENT
DETERIORATED
CLOGGED
"OFF"
NO FLOW
ENGINE
NOT GOOD
Replace the oil warning light, oil warning unit, or
oil level switch.
6-1
TRBL
Add.
Add.
Replace.
Clean or replace.
Set to "ON".
Clean or replace the fuel
tank or fuel hose.