Ariens HVZ 915085-2350 Service Manual download pdf (Page 32)

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10.2 FUEL PUMP

The impulse style fuel pump is the most commonly

used fuel pump. Impulse fuel pumps may either be

mounted externally onto the carburetor fuel inlet or

remotely mounted. These pumps are connected in the

fuel line between the fuel supply and the carburetor or

directly to the fuel inlet.

Impulse fuel pumps are operated by crankcase

impulses created by the up and down movement of the

piston. A hose called a pulse line connects the fuel

pump diaphragm chamber and transmits the impulses

to the pump diaphragm. The impulses actuate the

diaphragm and the flap valves to lift the fuel from the

fuel tank to the carburetor.

10.3 FUEL SYSTEM CONTAMINATION

Any time fuel contamination is found in the fuel system

(dirt, water algae, etc.) replace the fuel, fuel filter and

flush the fuel lines. Remove the carburetor bowl and

clean. Replace all items that cannot be cleaned.

Reassemble the fuel system and check for proper

operation.

10.4 FUEL TANK

The fuel tank is made of composite material for long life

without breaking down from the additive used in

today’s blended fuels.

10.5 FUEL TANK REMOVAL

1. Drain gas from tank (5, Figure 25).

WARNING: Fuel vapors are explosive and flammable.

Keep fuel in proper containers and clean up any spills

immediately. Handle fuel in well ventilated areas.

2. Disconnect gas line and attach to new gas tank.

3. Remove tank bolts (6). Support tank when

removing bolts.

4. Remove tank from frame mounting bracket.

Install Gas Tank

1. Attach gas line to new tank.

2. Attach tank (5) to frame mounting bracket with tank

bolts (6).

Figure 25

1. Cable, Throttle

2. Key Switch

3. Clutch Switch

4. Choke Cable

5. Fuel Tank

6. Tank Bolt

7. Spacer

PE1222

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Ariens HVZ 915085-2350 Service Manual Page 32

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