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Gas Yamaha Gas Yamaha Golf Cars; G1 through "The Drive" and U-Max Utility Vehicles |
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07-16-2009, 06:40 PM | #1 |
Not Yet Wild
Join Date: Jul 2009
Location: STEELER/PENGUIN COUNTRY
Posts: 12
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g2 losing spark at high rpm
changed the ignition coil,& igniterbox, the pickup coil ohms are what they should be, and motor definately has a good ground,spark is great until high rpm,then cuts out .motor runs great at low rpm , also checked all the wiring and connections ,any ideas?
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07-18-2009, 02:03 PM | #2 |
Gone Wild
Join Date: Oct 2008
Location: Out past the Creek, Arizona
Posts: 856
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Re: g2 losing spark at high rpm
Could it be running out of fuel ???? Just a thought...
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07-18-2009, 02:18 PM | #3 |
Gone Wild
Join Date: Oct 2008
Location: Out past the Creek, Arizona
Posts: 856
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Re: g2 losing spark at high rpm
Did you have this problem before you changed those parts????
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07-18-2009, 04:23 PM | #4 |
Sometime's............
Join Date: Oct 2007
Location: Tacoma Washington
Posts: 11,874
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Re: g2 losing spark at high rpm
May sound strange, I'd check your primary clutch weights.
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07-18-2009, 06:08 PM | #5 |
Not Yet Wild
Join Date: Jul 2009
Location: STEELER/PENGUIN COUNTRY
Posts: 12
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Re: g2 losing spark at high rpm
using a dynamic spark tester the spark is nice and blue, until high rpm then the spark just quits, engine slows then recovers,
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07-18-2009, 06:19 PM | #6 |
Not Yet Wild
Join Date: Jul 2009
Location: STEELER/PENGUIN COUNTRY
Posts: 12
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Re: g2 losing spark at high rpm
yes the kids where driving the cart, and thought they had run out of fuel, so i checked the fuel it was fine then started checking everything out including tearing the carb apart, airbox, fuses, all the usually suspects, only to find the spark quiting at high rpm.thought it was the igniter for sure, but after 200 dollars that was not it,
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07-19-2009, 04:21 PM | #7 |
Not Yet Wild
Join Date: Jul 2009
Location: Middle GA
Posts: 2
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Re: g2 losing spark at high rpm
My dad is having the same problem. He found out that the Yamaha has a rev limiter in the ignition module that cuts the ignition off at high rpm's. Supposedly this is a safety feature that thinks that the throttle is hung wide open and cuts the ignition off. From what I understand, you have to let off the throttle, let the cart slow down, the ignition resets, and will start again. He is still looking for a work around. As a side note, he has modified numerous things on the stock engine for more performance, ie. rejetted the carb, removed the govenor, high flow air filter, to name a few. At the Bonanza this weekend, it cut in on him about 100ft. before the finish in the drag race time trial. Hope this helps.
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07-23-2009, 10:27 PM | #8 |
Not Yet Wild
Join Date: Jul 2009
Location: STEELER/PENGUIN COUNTRY
Posts: 12
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Re: g2 losing spark at high rpm
clutch weights solved the problem thanks for the advice
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07-24-2009, 08:39 AM | #9 |
doin it in the desert
Join Date: Dec 2008
Location: Sonora Desert,Az
Posts: 5,603
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Re: g2 losing spark at high rpm
welcome to the forums pensfan87
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