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Gas Yamaha Gas Yamaha Golf Cars; G1 through "The Drive" and U-Max Utility Vehicles |
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07-23-2012, 10:02 PM | #1 |
Not Yet Wild
Join Date: Jul 2012
Posts: 54
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yamaha g2 running very rich and losing power
plug is black with soot and sputters at full throttle. Ran great before i fixed airl leaks. I replced the carb spacer with an oem unit (old one cracked). I used oem gaskets as well. I also repleced air box gasket and filter. There are absolutely no obstructions in air box. I have a brand new carb on there as well. That was repleced a year ago with the set screw turned 1 and half times. I also rebuilt the fuel pump. The spark plug is a ngk b5ep. The cart runs good if you disconnect the air box intake hose obviously. I dont know where to turn next guys. One of those weird issues. here is some pictures. the first one is of the plug becuase it is so **** rich. The second one is a pic of the new carb. I would like for someone to tell me what that spring loaded screw is for on the fuel bowl. thanks
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07-24-2012, 12:15 PM | #2 |
Admin/Moderator
Join Date: Dec 2006
Location: Ohio
Posts: 18,010
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Re: yamaha g2 running very rich and losing power
It's getting too much gas, turn the screw in 1/4 turn at a time and see if it helps.
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Ron
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07-24-2012, 04:23 PM | #3 |
Not Yet Wild
Join Date: Jul 2012
Posts: 54
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Re: yamaha g2 running very rich and losing power
That top screw? The one on the bowl is just a drain I found out. I unscrewed it a little and gas started draining out of bowl. Thanks buddy
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07-24-2012, 07:42 PM | #4 | |
Sometime's............
Join Date: Oct 2007
Location: Tacoma Washington
Posts: 11,868
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Re: yamaha g2 running very rich and losing power
Quote:
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07-25-2012, 07:13 AM | #5 | |
Not Yet Wild
Join Date: Jul 2012
Posts: 54
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Re: yamaha g2 running very rich and losing power
Quote:
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07-25-2012, 05:36 PM | #6 | |
Not Yet Wild
Join Date: Jul 2012
Posts: 54
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Re: yamaha g2 running very rich and losing power
Quote:
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07-25-2012, 06:55 PM | #7 |
Sometime's............
Join Date: Oct 2007
Location: Tacoma Washington
Posts: 11,868
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Re: yamaha g2 running very rich and losing power
I have no experiance with the Champion RN5, but any Champion or Autolite my customers have installed don't last long. Glad I could help alittle
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07-25-2012, 07:45 PM | #8 |
Not Yet Wild
Join Date: Jul 2012
Posts: 54
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Re: yamaha g2 running very rich and losing power
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07-25-2012, 09:58 PM | #9 |
Vegas modded 420
Join Date: Jun 2009
Location: West MI
Posts: 15,433
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Re: yamaha g2 running very rich and losing power
The BPR2ES is the stock plug for newer yamaha and my dealer recommended I use it in G2/9 carts. It works the best I found and is much more resistant to fouling from mixture problems.
The carb may be jetted richer for a aftermarket filter, and also there are different carbs for different years you may not have the same one. Anyway, I have run mine without that air silencer for many years and jetted it richer. It works great. My plug is always dark but they run cooler that way and make more power. It never smelled until it got tired and finally now it is burning a little oil. My clone is nearly ready to go in. |
07-26-2012, 08:37 PM | #10 |
Not Yet Wild
Join Date: Jul 2012
Posts: 54
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Re: yamaha g2 running very rich and losing power
Tested the ignition with an inline and everything is good. I just went ahead and ordered the Ngk plug you guys recommended for the added security. Thanks again.
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