I have a ECHO srm 2400 weed wacker with a zama c1u k18 carb in it. I know its not a chain saw but with the number of knowledgeable people here I'm hoping to get some help. I cleaned it by soaking it in Berrymans parts cleaner (paint can). It is spotless with new gaskets and diaphragms but it still wont run. I can't get it to prime!! When I pump the purge bulb it pushes bubbles into the gas tank. I think it has a bad check valve. Is there a valve in the primer base part or is the only check valve next tot the needle? Does anyone have experience on replacing check valves? How do you get them out?
ZAMA carb help
- Thread starter dave_376
- Start date
Help Support Arborist Forum:
zogger
Tree Freak
Sounds like your lines are crossed at the purge valve. Most of these I have seen, well, all of them so far, suck fuel through the carb.
Are you saying that they suck fuel through the main body of the carb into the purge bulb and then the air and excess fuel back out through the prime assembly into the gas tank?
zogger
Tree Freak
100%, sucks fuel through the carb, from the tank. It purges the air then.
Carbs I have seen, the closest together carb purge valve nipple (suck side on the purge, feel it with your finger) and nearwest carb nipple go toether. Other side of the carb is the inlet nipple from the tank and filter. Remaining purge nipple is return to tank.
zogger
Tree Freak
I just looked at a picture, yours is built right onto the carb?
USA Zama : Products
I would think, push the purge valve, see which of the nipples wants to suck then, stick the fuel line there.
Nice pdf of their basic carbs, how they work
http://www.zamacarb.com/pdfs/TechGuide_2007.pdf (page 13 should help)
USA Zama : Products
I would think, push the purge valve, see which of the nipples wants to suck then, stick the fuel line there.
Nice pdf of their basic carbs, how they work
http://www.zamacarb.com/pdfs/TechGuide_2007.pdf (page 13 should help)
It still wont prime. I switched the lines a few times and nothing. I put the fuel line on the carb nipple and pulled it over until I could get it to run 30 or 40 times but still no purging with the bulb. I still think there is a bad check valve somewhere.
zogger
Tree Freak
Could be, look at the links there
the diagram shows check valves in the prime base assembly.
zogger
Tree Freak
Good place to start then. Could be dirty and not functioning, or need replacing.
