SOURCE: i keep fouling my plug on my 03 rm85. oil/fuel mix is right
what color is the spark plug when you take it out? All black too rich, a chalky white look is way too lean which is far worse than a rich mixture. I blew up my CR-80 when I was a kid from an improper fuel mixture. You really have to get that correct and the dealer can give you the numbers on that. Also you might wanna get a measuring cup from a local dollar store or discount store to help you add the correct mix into the gas. You said its boggy in 1st and 2nd....how is it from 3rd up? Has the carb been jetted for possibly a different exhaust pipe or filter that aren't on the bike anymore? Or did you change those components and not jet correctly? I'm going to log this as a solution, but its borderline a clarification request....
SOURCE: 1992 Ford F250 - fuel injected motor - running too rich
you cant adjust fuel on the ford governor its fixed.you can adjust fuel on cummins governor.have your governor injection timing check .make sure air filter not stopped up or restricted.it will cause it to run rich.
SOURCE: Husqvarna z5426 running rich and fouling plugs
Sounds like a fouled needle seat, or the float bowl is failing.
Start with:
Pulling your Carb, and cleaning it out. COMPLETELY.
A ton of people think "a shot of carb cleaner, and a gasket kit" is a carb fix. It is NOT, and WILL NOT fix a carb, if the problem isn't gaskets, and shots of cleaner!
Meaning, if she is running too rich, then too much fuel (as you said), and fouling plugs, remember there are only a VERY few things in the carb anyway as it is.
1. Needle Seat
2. Fuel Float Bowl
3. Butterflies
4. Fuel Ports
5. Air Ports
6. Gaskets/Diaphragms.
My advice: (This assumes you HAVE NOT ADJUSTED YOUR CARB OUT OF DEFAULT!)
Pull the carb (Carefully!) and tear it COMPLETELY down (Carefully!). Note where stuff went, take your time, be patient.
When you have everything but the butterfly plates out, run some Gum-Out through each and every port, after you made sure to pull the Float Bowl, and the Needle Valve (and remembered how they went back in there!). Take some compressed air, and follow through (CAREFULLY!) on each and every port. Clean the very TIP of the Needle Valve. Shake your plastic Float Bowl. Does it have liquid inside? She has a hole in her. REPLACE!
If not, then this exercise was cleaning crud/residue that is ALWAYS building up inside carbs in 2/4-stroke engines world wide, every day. NOW do a "carb gasket rebuild".
Note: Remember that sometimes, crud/junk is testy, and stubborn as a mule to get out. Double check any screens above/below your Needle Seat and Valve. Remember that Needle Valves come with solid tips, and some with rubber tips. Regardless, be careful, and clean thoroughly! A Needle Seat that isn't getting closed, is a Needle Valve that is letting WAY too much fuel in!
SOURCE: air fuel mix too rich, what are my possble
well could be a o2 sensor could be throttle possition sensor, coolant temp sensor, could be a bad injector,map sensor, maf sensor, could also be a vacume leak hope this helps its a starting point anyway
SOURCE: carb is getting clogged and spark plugs fouling
Carburetor cleaner will ruin the rings and do that.
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