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Ariens HVZ 915085-2350 Service Manual Page 30

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  • TROUBLESHOOTING
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10.1 FUEL SYSTEM TROUBLESHOOTING
The following troubleshooting chart is to be used to
isolate fuel system problems and give possible causes
are corrective action responses
The possible causes are generic and can be used for
several types of fuel systems. Use only those possible
causes and corrective actions that apply to the unit.
SECTION 10 - FUEL SYSTEM
FUEL SYSTEM TROUBLESHOOTING
Problem Possible Cause Corrective Action
Hard to start Plugged air filter Clean or replace air filter
Throttle or choke shaft worn Replace shaft
Choke not functioning properly Service choke
Air bleed restricted Remove obstruction
Plugged tank or vent Remove obstruction
Damaged adjustment needle and seat Replace needle and seat
Main nozzle restricted Remove obstruction
Dirty, stuck needle and seat Clean needle and seat
Fuel inlet plugged Remove obstruction
Fuel Leak at Carburetor Plugged atmospheric vent Remove obstruction
Damaged or “leaky” O-rings Replace O-rings
Dirty, stuck needle and seat Clean needle and seat
Engine Floods Plugged atmospheric vent Remove obstruction
Incorrect float height Adjust float
Dirty, stuck needle and seat Clean needle and seat
Will not idle Plugged air filter Clean or replace air filter
Leaky carburetor gasket Replace gasket
Throttle or choke shaft worn Replace shaft
Air bleed restricted Remove obstruction
Rich idle Plugged air filter Clean or replace air filter
Air bleed restricted Remove obstruction
Main nozzle restricted Remove obstruction
Idles with Needle
Closed
Damaged adjustment needle and seat Replace needle and seat
Hunts Erratic Idle Leaky carburetor gasket Replace gasket
Throttle or choke shaft worn Replace shaft
Air bleed restricted Remove obstruction
Damaged or “leaky” O-rings Replace O-rings
Fuel pickup restricted Remove obstruction
Idler port restricted Remove obstruction
Damaged adjustment needle and seat Replace needle and seat
Incorrect float height Adjust float
Fuel inlet plugged Remove obstruction
Idles Fast Lean Leaky carburetor gasket Replace gasket
Throttle or choke shaft worn Replace shaft
Damaged or “leaky” O-rings Replace O-rings
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