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Old 07-12-2009, 09:23 AM   #1
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Weed eater will not start?


Ryobi 725r 31cc, 15" weed eater
The unit was working fine, except the fuel line broke, so I replaced all the fuel lines. I am 90% sure they are in the correct position. The fuel goes from the tank down to the bottom of the Walbro carb, gets sucked up through and out the top of the carb, back to the fuel prime button, and back into the bottom of the fuel tank.
When I remove the hose from the bottom of the carb, fuel comes out - this should indicate fuel flow to this point - good. The fuel prime button however does not get fuel so it should mean fuel is not sucked getting through the carb. The fuel prime button does suck when I disconnect the fuel line from the top of the carb and hold my finger over the end of the fuel line still connected to the prime button, so the fuel prime button should be ok. The unit does not start and seems to be fuel related. Thanks in advance for your assistance.

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Old 07-13-2009, 06:41 PM   #2
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Weed eater will not start?


Is there a fuel filter on it--if so it may be plugged?? Is there a bowl on the bottom of the carb that you can take off to see if you are getting any gas? Have you tried spraying any ether directly into the carb and seeing if it will fire??

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Old 12-13-2009, 02:16 PM   #3
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Weed eater will not start?


HI I have had the same problem, regarding the fuel line breaking, I replaced all the line with new lines refitted in the correct order, I have the fuel flowing from the fuel tank to carb, from top of carb through primer back to tank.

Now I also poured some fuel directly into the carb, resulting in the weed eater starting and then stalling when all the fuel has been used.

Any ideas why it will not start?

Ren
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Old 12-13-2009, 07:17 PM   #4
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Weed eater will not start?


Quote:
Now I also poured some fuel directly into the carb, resulting in the weed eater starting and then stalling when all the fuel has been used.

Any ideas why it will not start?
Ayuh,... My guess is the Carb itself is plugged internally...
That's why most weedwackers end up in dumpsters... Plugged Carbs...
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Old 12-13-2009, 08:54 PM   #5
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Weed eater will not start?


i would have to say the carb. but my john deere weed eater would not start so i brought it in and a Hornet made a nest in the exhaust pipe. Cleaned it out and it fired right up. Its something to look at i guess.
good luck
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Old 01-15-2010, 11:50 AM   #6
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Weed eater will not start?


fuel , spark and compression. Put fuel in piston chamber and try to start. If it runs, it is most likely fuel diaphram

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