Chinese 90cc atv issue
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Laughing Gas
Joined: Oct 2012
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Chinese 90cc atv issue
Here's the story - bought it from a coworker for the kids. Was working fine, then gas tank started to leak. Top of carb had been damaged so throttle cable had a mind of its own at times. I bought a new gas tank and carb. Installed them both no big deal. Got it to start and my son took it for a test lap around the house. Restarted it one more time in the garage just to be sure.
Next day - all it will do now is crank. There is fuel in the carb, i can smell it in the exhaust. There is spark. I have 150psi compression via compression gauge. The kill switch is in the right position. I even tried putting a squirt of carb cleaner in spark plug hole. Last night i spent 2 hours messing with the thing still can't get it to fire off. I checked all the electrical connections, pulled apart the kill switch on the handlebars which seems to work fine. The atv will crank over with kill switch in either position??? Is that normal?
During my two hours last night i put the old carb back on even....no dice. I even tried adjust the air/fuel mix screw...no change.
Any and all ideas are appreciated!
Next day - all it will do now is crank. There is fuel in the carb, i can smell it in the exhaust. There is spark. I have 150psi compression via compression gauge. The kill switch is in the right position. I even tried putting a squirt of carb cleaner in spark plug hole. Last night i spent 2 hours messing with the thing still can't get it to fire off. I checked all the electrical connections, pulled apart the kill switch on the handlebars which seems to work fine. The atv will crank over with kill switch in either position??? Is that normal?
During my two hours last night i put the old carb back on even....no dice. I even tried adjust the air/fuel mix screw...no change.
Any and all ideas are appreciated!
Elder User
Joined: Jun 2014
Posts: 558
Likes: 2
Here's the story - bought it from a coworker for the kids. Was working fine, then gas tank started to leak. Top of carb had been damaged so throttle cable had a mind of its own at times. I bought a new gas tank and carb. Installed them both no big deal. Got it to start and my son took it for a test lap around the house. Restarted it one more time in the garage just to be sure.
Next day - all it will do now is crank. There is fuel in the carb, i can smell it in the exhaust. There is spark. I have 150psi compression via compression gauge. The kill switch is in the right position. I even tried putting a squirt of carb cleaner in spark plug hole. Last night i spent 2 hours messing with the thing still can't get it to fire off. I checked all the electrical connections, pulled apart the kill switch on the handlebars which seems to work fine. The atv will crank over with kill switch in either position??? Is that normal?
During my two hours last night i put the old carb back on even....no dice. I even tried adjust the air/fuel mix screw...no change.
Any and all ideas are appreciated!
Next day - all it will do now is crank. There is fuel in the carb, i can smell it in the exhaust. There is spark. I have 150psi compression via compression gauge. The kill switch is in the right position. I even tried putting a squirt of carb cleaner in spark plug hole. Last night i spent 2 hours messing with the thing still can't get it to fire off. I checked all the electrical connections, pulled apart the kill switch on the handlebars which seems to work fine. The atv will crank over with kill switch in either position??? Is that normal?
During my two hours last night i put the old carb back on even....no dice. I even tried adjust the air/fuel mix screw...no change.
Any and all ideas are appreciated!
Did you remove the plug from the motor to make sure it was firing or just pull the wire and put a spare plug on to check? I bought one of those cheap generators and the sticky said to replace the plug and it ran better.
Hotshot
Joined: Mar 2011
Posts: 11,950
Likes: 5,076
Years ago I spent a few months working on oil field facilities in Northeast China. They really were clueless about so many things, largely because their society doesn't all them to do or know anything that's not approved by a government official.
China's much like Europe in that almost all electrical power is 220V. One of the things they asked us to do was figure out why none of the computer terminals in the next building would work. (This was at a time when you had a terminal connected to a central computer, not a computer on your desktop.) It turned out there was a 27 volt current on the neutral ground. When told of the issue the Chinese' response was "so? Make the terminals work. Everything else in the building works."
Since that day my pet phrase for electrical issues has been "damned Chinese wiring". I use it a lot when I see how some houses are wired. It seems to apply to your issue and I have no copyright on the phrase
China's much like Europe in that almost all electrical power is 220V. One of the things they asked us to do was figure out why none of the computer terminals in the next building would work. (This was at a time when you had a terminal connected to a central computer, not a computer on your desktop.) It turned out there was a 27 volt current on the neutral ground. When told of the issue the Chinese' response was "so? Make the terminals work. Everything else in the building works."
Since that day my pet phrase for electrical issues has been "damned Chinese wiring". I use it a lot when I see how some houses are wired. It seems to apply to your issue and I have no copyright on the phrase
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BioHazrdMan
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Jun 28, 2009 07:34 PM
