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



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Old 04-30-2013, 10:04 AM   #1
littlekpd
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Join Date: Apr 2011
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Default G9 smoking, also loss of power

Hi, I'm new to the site and new to the golf cart world. I bought a 1992 G9 and it will run and its alot of fun but I am having a couple issues and hoping for some advise.
When the motor is cold it smokes but the smoke goes away once the motor has warmed up ( smoke is pretty blue)

When i press the accelerator to the floor in bogs down. runs the fastest at about 3/4 press

I've heard of a couple fixes anywhere from new rings to valve adjustment. I'm capable of anything that needs to be done. Before I tore into it tonight I was hoping for a little advise

Thanks in advance
Josh
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Old 04-30-2013, 10:24 AM   #2
littlekpd
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Default Re: G9 smoking, also loss of power

Also I put a new plug in about a week ago and its awfully dark and toasty. there appears to be oil sitting on top of the piston. hard to tell for sure but it does look like oil
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Old 04-30-2013, 05:53 PM   #3
smallblock450sl
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Location: Tacoma Washington
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Default Re: G9 smoking, also loss of power

Sounds like the oil rings are worn and/or valve stem seal. G2 thru G14's are netorius to not run correctly if the air box isn't sealed correctly.
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Old 04-30-2013, 09:46 PM   #4
littlekpd
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Default Re: G9 smoking, also loss of power

I have 150psi compression. I took the head off and ordered new vales and seals and gaskets. the valves looked a little worn
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