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Gas Yamaha Gas Yamaha Golf Cars; G1 through "The Drive" and U-Max Utility Vehicles



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Old 05-30-2012, 10:26 AM   #1
yami#1
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Default yamaha G1 starts in reverse but no spark in forward

A friend gave me a G1 that starts and runs great in reverse but you turn the key to forward and it wont start I pulled the plug and it has no fire you swap it back to reverse and it fires fine it just wont fire in forward this is my first cart and any help would be greatly appreciated
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Old 05-30-2012, 04:54 PM   #2
caddylac camper
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Default Re: yamaha G1 starts in reverse hut no spark in forward

The main difference between forward and reverse other than engine rotation is the grounding of the magneto and cdi unit. This is done with the ignition switch, the white/red wire is grounded in forward and the white/green wire is grounded in reverse. Make sure your connections are good on the white/red wire at the ignition switch, the magneto and the cdi unit, ground the white/red wire by connecting it to a black wire or the battery negative terminal and try to start it in forward. If it starts you have a bad contact in the ignition switch, if there is no spark you will probably need a new cdi unit. Make sure you are grounding the white/red wire and not the red/white wire as the red/white is battery positive.
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Old 06-05-2012, 11:11 AM   #3
yami#1
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Default Re: yamaha G1 starts in reverse but no spark in forward

it only sparks when you first hit throttle and when you let off even with the white/red wire grounded if you swap solenoids it will fire forward but acts like it it out of time the piston fires back down before it reaches tdc
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