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Old 05-29-2015, 05:02 PM   #1
lady bug
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Default g8 issues

I have what I believe to be a g8 yamaha golf cart. I got it from a friend literally in baskets motor and all. I am really familiar with carts so didn't think the job would be to bad.well I got it all together new rings bearings ect. Got it back in the cart today and started on the wiring. After putting together it won't run past 500 rpm. Almost like I hit a Rev liter absolutely refuses to spool up at all but 500 rpm or under purrs like a kitten cleaned fuel tank . New carburetor battery and starter Gen seem to be good . I ohm tested the flywheel pickup and that also works fine I'm down to the ignitor box but don't want to buy one to find out that's not the issue . Any help would be awesome thanks guys
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Old 05-29-2015, 05:09 PM   #2
1989Marathon
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Default Re: g8 issues

If it won't go over about 500 rpms, it probably isn't even running. Just turning over with the starter. Pull the plug wire off and see if it acts any different.
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Old 05-29-2015, 05:53 PM   #3
smallblock450sl
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Default Re: g8 issues

Better yet, use a dynamic spark tester. You can see if there's spark and you wont have a chance of blowing out the TCI.
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Old 05-29-2015, 06:40 PM   #4
lady bug
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Default Re: g8 issues

The engine is running not just turning over. It dies when you pull plug wire but does not want to run over 500 rpm At all
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Old 05-29-2015, 06:43 PM   #5
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Default Re: g8 issues

some times the cart will continue to run after the pedal is not depressed and the only way it will stop turning over I have to pull a battery terminal when this happens it refuses to start up will just sit and turn over
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Old 05-29-2015, 06:53 PM   #6
1989Marathon
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Default Re: g8 issues

Is the plug wet or dry?
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Old 05-29-2015, 06:57 PM   #7
cgtech
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Default Re: g8 issues

I have seen a bad voltage regulator or a bad solenoid cause "keeps cranking". Is it possible the ignition components / flywheel are mismatched. See "Smallblocks" stickie on engine swaps for incompatible ignition parts info. When i had a mismatched flywheel on a cart (also brought to me in pieces), it wouldnt rev either.
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Old 05-29-2015, 07:42 PM   #8
lady bug
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Default Re: g8 issues

I checked just now and the plug is black very black . And watched the spark with my tester and at low rpm it seems to be a decent spark but I get up to that 500 rpm mark and the spark stI'll ignites but barely enough to light the tester
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Old 05-29-2015, 07:50 PM   #9
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Default Re: g8 issues

This one has me stumped pretty good. The spark seams weak most of the time. Is there a ground on these that I could have missed the only ground I have is the one that goes from the batter to the starter/gen
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Old 05-29-2015, 07:50 PM   #10
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Default Re: g8 issues

And also once IN awhile it will crank really fast and at other times acts like it has a low battery
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