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ZAMA Carb Problems

- Fri, 05 Jun 2015 17:29:41 EST cymD6AGd No.6706
File: 1433539781384.jpg -(38518B / 37.62KB, 500x666) Thumbnail displayed, click image for full size. ZAMA Carb Problems
Hey /tesla/

I recently took apart an old TORO weed whacker that hadn't run in like 12 years, and got it running...briefly. It started up for like 2 seconds, and shut down.
I figured out after pulling the cord a bunch of times that the engine was being flooded. This was indicated by fuel spitting out of the exhaust. So I sat and thought about it and disconnected the fuel intake line from the carburetor. Sure enough, after a few pulls on the cord, it started up and ran for a good 8 seconds with a few revs before it shut down. So it ran on magic.
So it's either getting too much fuel, or not enough air. Too much fuel I'm thinking.
I can't find anything on how to adjust an old ZAMA carburetor online though. They're all newer models. This one doesn't have the priming bulb.
Sophie Minnerfotch - Sat, 06 Jun 2015 20:42:28 EST a5xmRWEe No.6710 Reply
pictures of carb plz

does it have any adjustment screws on it? I would start messing with those, just monitor how much rotation you apply so you can reverse it. also get some new premium gas from a clean can, and check the spark plug. also check any filters that could be affecting fuel flow.
Edwin Cogglestock - Sun, 07 Jun 2015 09:47:20 EST cymD6AGd No.6714 Reply
I think I'll have to adjust the amount of fuel that's allowed by sealing the end of the fuel line and making a needle puncture sized tiny aperture thingy. That might do it...
Walter Dendleped - Sun, 07 Jun 2015 21:13:18 EST cymD6AGd No.6715 Reply
Okay, that didn't really work any better. All it did was make the fuel move through the line slower, which meant a bunch more pulls just to have it run for like 4 seconds. So, maybe it needs more air AND less fuel. Here are a couple images that resemble it. It's late and I don't feel like going down to the garage to get a better look for a model number on it. All the fuel is nice, and the spark is ferocious. I may just disassemble the carb again. Maybe the problem is the needle is too loose?




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