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Old 06-19-2021, 02:12 PM   #1
WBville07
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Default 2007 ST350 Robins MCI - Gets sluggish and quits after it gets warmed up

2007 EZGO ST350 - the cart fires up and runs great for about 10 minutes. Once it gets hot, if you stop the cart it won’t fire up and run again. If it does run at all it’s very sluggish and just barely chugs along. Both spark plugs were black on the tips but dry and cleaned up just fine. Adjusted the valves to the .004 spec. All this made it run better but still found the same issue once it heated up. Is this an ignition coil that needs replacing? Any suggestions?
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Old 06-19-2021, 03:04 PM   #2
sthreatt
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Default Re: 2007 ST350 Robins MCI - Gets sluggish and quits after it gets warmed up

Quote:
Originally Posted by WBville07 View Post
2007 EZGO ST350 - the cart fires up and runs great for about 10 minutes. Once it gets hot, if you stop the cart it won’t fire up and run again. If it does run at all it’s very sluggish and just barely chugs along. Both spark plugs were black on the tips but dry and cleaned up just fine. Adjusted the valves to the .004 spec. All this made it run better but still found the same issue once it heated up. Is this an ignition coil that needs replacing? Any suggestions?
Is it a lifted Cart ? Whenever they are lifted It changes the orientation of the motor, and the reading on the dipstick when showing FULL is actually over full. Being over full in oil can cause oil to accumulate in the pulse hose that activates the fuel pump. Not saying this is the case here, I don't even know if it's lifted or stock height. Just something to consider. ALSO, I had one in the shop the other day that wasn't properly venting the gas tank. After running about 10 or 15 minutes it would build a vacuum inside the tank and start starving for fuel. Try cracking the cap loose just enough for it to get some air and relieve any possible vacuum. AGAIN, just an initial possibility. Gotta be losing gas or spark one. Go for the easy first.
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Old 06-19-2021, 10:46 PM   #3
bgood
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Default Re: 2007 ST350 Robins MCI - Gets sluggish and quits after it gets warmed up

I had this with my 97. replaced the CDI (ignitor) problem solved.
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