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Gas Yamaha Gas Yamaha Golf Cars; G1 through "The Drive" and U-Max Utility Vehicles |
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05-06-2012, 12:08 AM | #1 |
Not Yet Wild
Join Date: May 2012
Posts: 2
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G9 backfiring, no power . . . confusing!
Hi everybody,
I have a Yamaha G9 that seems to have lost all power. Here's what I have tested so far . . . I have a great spark at the plug . . . also disconnected the fuel line and cranked the motor for a while and got some good gas movement. Took apart the carburetor and everything seemed okay . . . no major gunk in the bowl or anything . . . put it back together and reinstalled. When I push the pedal, the cart moves forward very slowly and there are constant backfires. I tried disconnecting the intake from the carb and there seems to be the occasional large backfire, which is pretty loud when the intake is disconnected. I opened up the valve cover and it seems that everything is working the way it ought to. Every once in a while, when I am trying to start out slowly, the motor will kick hard in the opposite direction for a moment, as if it caught reverse for a brief second, or the motor dieseled backwards or something. This cart was running okay before last week . . . it was pretty touchy (needed a lot of choke), but once it got going, it was great. I'm at my wits end with this cart! Can anyone help me with this? |
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05-06-2012, 09:18 AM | #2 |
Gone Wild
Join Date: Jul 2008
Location: Reddick IL
Posts: 11,217
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Re: G9 backfiring, no power . . . confusing!
A low cost effort is take the carb off and clean it using a set of torch cleaners.
Those low speed jets can have gum in them and you say you had to use a lot choke. |
05-06-2012, 02:30 PM | #3 |
Not Yet Wild
Join Date: May 2012
Posts: 2
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Re: G9 backfiring, no power . . . confusing!
Thanks for the tip!
I took the carburetor apart twice -- once for a basic cleaning, and the second time for a more in-depth cleaning . . . removed all the jets and everything looked pretty good. Still popping and bucking and never actually firing . . . sometimes kicks backwards for a moment. From looking at one of the parts diagrams, it appears that I don't have a seal to go around the air box. Would it work if I used some foam tape and then strapped it shut again? Where are all the ground points on this cart? |
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