2 cycle 31 cc 15" model 705r curved shaft trimmer plus click link weed wacker ..seems to flood,fuel drips from air intake ,after carb adjustments still will not start cant seem to regulate fuel ,checked for spark .ok ,will briefly run when spraying ether,when issue first started ran fine but seemed to bog and stall when increasing throttle

If you go to searsparts.com and put in your model number it will show you a drawing of your weed wacker. Not sure of what you are looking for. Hope this helps.

Probably time to rebuild the carb and also check the air filter.

Fuel issue, carb adjustment, fuel lines, carb rebuild.

check the oil and see if its over full the carb might be leaking fuel into the crankcase

Hi, basically the needle in the carby is not sealing correctly. This could be due to the lever height not being adjusted to level with the lower carby body or the gasket not being fitted before the diaphragm on the needle side of the carby. Hope this helps, regards Phil.

Hi and welcome to FixYa, I am Kelly.

You can find your trimmer here:
http://www.searspartsdirect.com/partsdirect/part-model/Troybilt-Parts/Grass-trimmer-weed-wacker-Parts/Model-TB425CS/1307/1503820?pathTaken=&prst=0&shdMod=TB425CS

You can click on Boom and trimmer parts to see the details.

Or you can use this direct link:
http://www.searspartsdirect.com/partsdirect/part-model/Troybilt-Parts/Grass-trimmer-weed-wacker-Parts/Model-TB425CS/1307/1503820/P0403525/00002?blt=06&prst=0&shdMod=TB425CS

For a printable enlarged picture use this link:
http://c.searspartsdirect.com/lis_png/PLDM/P0403525-00002.png Use IE explorer to enlarge it to 200 % for best viewing.

Hopefully this is what you needed. If not respond here and I will help you.
Thanks for choosing FixYa,
Kelly

Hi and wel;come to FixYa, I am Kelly.
The part you need is item 9 on most parts lists:

Your problem is caused by either drive shaft failure or.. clutch failure. Most of the time the drive shaft fails before the clutch.

The manual is here:
http://www.mymowerparts.com/pdf/Ryobi_String_Trimmers_Blowers_Tillers/700r.pdf

Shaft is PN 682064 or 753-04280

Sears parts direct has the shaft as item 10 this link:
http://www.searspartsdirect.com/partsdirect/part-model/Ryobi-Parts/Grass-trimmer-weed-wacker-Parts/Model-700R/0909/1503820/10060718/00002?blt=06&prst=0&shdMod=700R

Detailed view:
http://www.searspartsdirect.com/partsdirect/part-number/Ryobi-Parts/Grass-trimmer-weed-wacker-Parts/753-04280/0071/247/Model-700R/0909/1503820?keySuffixId=NA&productTypeId=x&searchModelNumber=700R&subCompDesc=Boom%20and%20trimmer&brandDesc=RYOBI&modelDesc=TRIMMER&pathTaken=partSearch&blt=11

Lower price here:
http://www.mowpart.com/p661995/Flex,-Shaft-(Rpls-682064)/product_info.html

Average price ($32.50)

Thanks for choosing FixYa,
Kelly

Most 2 cycle engines are basically the same. The primer button has two lines coming from it. Gas is actually s.ucked thru the carb and not pushed thru when you prime it. Take a look at the sketch I provided and hopefully you will get yours running again.

Check the carb jets, they might be a gummed up!

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. if that doesn't work have the carb repaired at a service center or replaced.