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Primer bulb not filling


Rob Latanville's Avatar
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06-12-16, 06:57 AM   #1  
Primer bulb not filling

Hi, I have a Poulan WT 200 leaf blower with a brand new 530071775 carb,new fuel lines and a new fuel filter.I can't get the primer bulb to fill with fuel.I've tried with the carb attached & unattached to the engine block.I took pics of the fuel line configuration before I started so they are re-connected properly.
I can't figure out what I'm missing.Manually poured gas into the chamber & it fires right up, so it's definitely a delivery issue.
Any suggestion would be greatly appreciated.Thanks.

 
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Rob Latanville's Avatar
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06-12-16, 07:04 AM   #2  
I also tried the old carb (with new fuel lines) & it won't prime either.

 
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06-12-16, 07:40 AM   #3  
Did that "new" Carb include a new Primer Bulb ?

I ask because it doesn't take much of a crack to create an air leak, and then all bets are off.

On my equipment, some Primer Bulbs keep on functioning even with cracks; others are quite tempermental and the smallest crack prevents priming.

 
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06-12-16, 07:58 AM   #4  
Yes the brand new carb came complete with the primer bulb.

 
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06-12-16, 11:05 AM   #5  
Is it returning to the original position with no gas in it or staying depressed?

 
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06-12-16, 11:56 AM   #6  
Yes the bulb returns to the original position every time,but will not draw gas up the fuel line.

 
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06-12-16, 12:21 PM   #7  
That sounds like an air leak in the intake line. Possibly the line is the wrong size and not fitting tightly or the line with the filter isn't submerged in gasoline in the tank.

If you have a spare piece of line hook that up where the line from the tank is and put the end in a cup of gasoline to see it will draw fuel into the primer.

 
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06-12-16, 01:13 PM   #8  
Been there,done that.I have spare fuel line & a spare(used) carb connected to a can of gas.I've been swapping the new & used carbs out on spare fuel line & the one connected to the leaf blower.Both carbs will not draw fuel.That was the reason I bought a replacement.
The fuel line is the correct size.(very hard to remove from the carb)
The new filter is sitting perfectly in the bottom of the tank.Trust me I've tried everything for the last 2 days.It's going in the garbage.Wasted $50.00 on a new carb.Should have junked it weeks ago & bought a Stihl.Lesson learned.

 
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06-12-16, 01:18 PM   #9  
With a new carb/primer and the intake line submerged and the line back to the tank from the carb clear there's no reason for it not to work. It's unusual but a new Stihl would probably fix it.

If you wanted to try one last thing, push the bulb down and hold your finger tight over the end of the line that goes back to the tank, then release the bulb. Do that a couple of times and see if it will fill. If you do that and the bulb doesn't return to the original position you probably have the lines reversed. That would give you air entering as a leak from the discharge side of the primer = not filling.

All failing, put it on Ebay.

 
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06-12-16, 04:38 PM   #10  
Thanks for the info.
I'll put it out by the road.....someone one will pick it up.
Thanks to all for your input.

 
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06-13-16, 10:26 AM   #11  
I would check the primer bulb operation. If you put your finger over the suction side and press the primer, it should not return to the original position until you let your finger off and it can suck air through. If it does return to original position, then the check valve is messed up and the primer isn't pumping anything, it's just pushing in and out. I've had new primers with bad check valves straight out of the package.


"Who is John Galt?" - Ayn Rand (Atlas Shrugged)

God bless!

 
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06-13-16, 11:22 AM   #12  
Ok.will check that tonight.Thanks.

 
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