Question about Homelite Consumer Products Backpack Blower/Vac, Carb

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New model ut08580 backpack will not start

When the primer bulb is pressed, no fuel appears in the bulb; the fuel lines are not blocked

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  • jmdionne Mar 18, 2009

    What do you mean by small fuel rail holes? Where are they??

  • Anonymous Mar 29, 2014

    replaced primer bulb and the unit will not pump fuel into carb replaced filter (did not have one )and fuel lines

  • Anonymous Mar 29, 2014

    replaced primer bulb ,fuel lines and filter The unit will not take in fuel even tried switching lines

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I have the same problem with my ut08580. When inspecting the carb, I noticed the diapham was torn. I cut a small amount off the corner of the diaphram and set it in the spot of the tear and put it back together. It worked for now, but I would like to order a new diaphram does anyone know how. I've been searching different parts sites for 3 hrs with no luck. I hope I don't have to buy a new carb.

Posted on Jun 04, 2009

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Check the fuek lines for hole and leaks, check the fuel filter and clean if necessary. remove the carbuerator and inspect the gasket; it should be soft and flexible, if it seems hard or brittle replace it. clean the carb with carb cleaner sray (available at any local auto parts store) and compressed air. make sure you get inside the small fuel rail holes. check the primer bulb for pin holes and seating/sealed properly. if that doesn't work have the carb repaired at a service center or replaced.

Posted on Nov 29, 2008

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1 Answer

I can't get it to start. Don't think the gas is moving when I pump it to start it. When I push on the bulb, it doesn't appear to pick up fuel.


Is the primer bulb filling with fuel.? If not then you either have a hole in the primer bulb or a hole in the fuel line, you mat also have a blocked primer bulb base.

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Sounds like it could be a number of faults.
1. Crack in the primer bubble its self, not allowing the creation of pressure or vaccum.
2. The plastic primer base has a valve in it. That could either be blocked or damaged.
3. Blocked up fuel line (not very likely)
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I\'d be putting my money on 1 or 2.

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The order of fuel travel should be:
Fuel filter to fuel hose to Carb's Fuel Supply nipple. (On the main body of the carb)
Primer Plate Nipple on carb to fuel hose to Suction Nipple on Primer Bulb. (It must pull fuel thru the carb, not push)
Pressure Nipple on Primer Bulb to fuel hose to Fuel Tank Return hose.

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