I have a red max ebz7500 backpack blower. The carb is a walbro wya64b. I cleaned the carb out, rebuilt it, replace the fuel lines, and fuel filter. It's not getting gas. As I pump the primer, I get nothing. But if I tilt the tank towards the l larger diameter line that's suppose to be the return line, it will pump. Help!
red max carb
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Boobala
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Sounds as though you have a blockage in the primer bulb section of your carb. be SURE your rubber diagphragm and gaskets are properly positioned over the proper holes, ( NOT up-side down) here's a few links that may help fix your issue, keep us up dated,
https://www.youtube.com/watch?v=jalfpoldyo0 ........... sound on this one is garbled for the first few seconds but stay with it.
http://www.walbro.com/wp-content/uploads/2016/01/WYAseries.pdf
https://www.youtube.com/watch?v=jalfpoldyo0 ........... sound on this one is garbled for the first few seconds but stay with it.
http://www.walbro.com/wp-content/uploads/2016/01/WYAseries.pdf
Didn't get the lines reversed or connected wrong someplace in the system. Line with filter to carb. Carb to short nipple on primer, and long nipple on primer back to tank. I hate the the new carbs with primers, If you pump the primer and can hear air being drawn through the center of the carb, then they check valves are stuck open, which is about 70% of the time it will not prime, will be hard to start if it will start, and most of the time will need to replace the carb to correct the issue.
I bought a new carb and still no gas. Gas lines are black line (small diameter) fuel feed, Greenish yellow line (larger diameter) return line. There is a small hole at the bottom of the intake base gasket, does that draw a vacuum of the carb to get gas? I can pour gas in the spark plug hole and she will fire up.
Here something puzzling, the carb diagram hose connections show the larger diameter hose is the fuel inlet and the smaller is the return. But when you look at the fuel line replacement it shows the opposite.
That hole should line up with a hole in the carb, and also a hole in the intake manifold. If it is blocked the fuel pump doesn't work. Some carbs use a separate pulse line to the carb, and I am not sure of your setup but check the alignment of the gasket holes.
Everything is aligned
Boobala
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Go over these links AGAIN, and these also, .... http://outdoorpowerinfo.com/repairs/walbro_WT340_carb.asp
the above link is NOT your model carb, but just to give you reference to information of procedures........
https://www.ereplacementparts.com/article/6125/How_to_Replace_Fuel_Lines_on_2Cycle_Engines.html
At this point, with a new carb, and the primer (is working ???) then it's time to remove and --THOROUGHLY -- CLEAN the ENTIRE fuel system, be sure the in-tank filter and fuel lines are REPLACED ! ( try to use the "TYGON" clear-yellow lines" ) hopefully the NEW carb didn't get any debris sucked into it... keep us up-dated. ...we want your machine running as much as you do !! .. :thumbsup:
The fuel line and fuel filter has already been replaced. The primer doesn't seem to work properly as most primer bulbs do. It's he strangest thing I ever seen.
Boobala
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Did you read and perform the test's in the article (ereplacement parts) IF so, .... even the new carb might be a "DUD" ..it happens ya know, but I would suspect the "check-valve" in the carb is malfunctioning .... you say it starts when putting fuel in the cylinder manually, so it has to be the carb. ..???
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