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12. CARBURETOR VITALITY 50
SERVICE INFORMATION (2-STROKE)
GENERAL INSTRUCTIONS
· When working with gasoline, keep away from sparks and flames..
· Note the locations of O-rings when disassembling and replace them with new ones during
assembly.
· All cables, fuel lines and wires must be routed and secured at correct locations.
· Bleed air from the oil lines whenever they are disconnected.
SPECIFICATIONS VITALITY 50
Setting mark PB168A
Type PB 14
Float level 8.6mm
Main jet #80 (Speed limit type: #72)
Slow jet #35
Air screw opening 2 1/2 1/2
Idle speed 1850100rpm
Throttle grip free play 26mm
SPECIAL TOOL
Float level gauge
TROUBLESHOOTING
Engine does not start Lean mixture
· No fuel in tank · Clogged fuel jets · Faulty float valve
· Too much fuel getting to cylinder · Clogged fuel cap vent · Float level too low
· Clogged fuel filter · Clogged fuel filter · Clogged air cleaner
· Clogged air cleaner · Bent, kinked or restricted fuel line
Engine idles roughly, stalls or runs poorly Rich mixture
· Incorrect idle speed · Clogged air cleaner · Faulty float valve
· Ignition malfunction · Intake air leaks · Float level too high
· Compression too low · Fuel contaminated · Clogged air jets
· Incorrectly adjusted air screw · Faulty reed valve
· Incorrect float level · Clogged fuel jets
12-2