Engine runs rich

nomogolf · 06-08-2018, 01:44 PM

1999 ezgo txt. Hard to start, pressing the pedal to the floor seems to flood the cylinders and plugs. I have to barely touch the pedal without any choke. Once started I notice black soot on the garage floor from the carts exhaust pipe. The carb is brand new 4 months ago. Is there a way to adjust the carb to lean out the mixture? Please advise. Any other remedy you guys can think of? Thanks in advance for your assistance.

Spicyunicorn · 06-09-2018, 10:26 AM

Start with setting valve lash to .004"

nomogolf · 06-11-2018, 10:42 AM

Valves are set at 0.004 already.

Reca · 07-07-2018, 12:25 AM

Bump... I have same issue. I also get a backfire when. Coasting down a big hill

Gearhead1956 · 07-07-2018, 08:38 AM

The first thing you have to do when buying one of these China carb's is take it completely apart soak it in carb. cleaner then blow it out with compressed air!

These carbs are a hit or miss ( junk )

But what can you get these days for $20

Reca · 07-07-2018, 11:24 PM

Is there a way to adjust the carbs?

Cartmaster · 07-09-2018, 12:51 AM

First of all, why did you replace the carb, and do you still have the old original one.

Gearheads advice is solid. Do it.

And no, there is basically no adjustment apart from setting float height.

Regarding backfiring, you need to make sure the carb is fully closed when the pedal is up.
If you listen carefully as you slowly push down on the pedal you will hear the pedal switch click. the carb must be set to start opening AFTER you hear the click, not before.

Reca · 07-09-2018, 10:54 AM

I replaced my carb because when I got the cart the car. Was cracked so I had no choice

Cartmaster · 07-10-2018, 12:58 AM

Fair enough. The aftermarket carb is most likely your main issue unless your inlet valves are sunk in the head, or you have worn rings etc.

Next step should be a compression test as this will show up any major issues with valves and rings/bore.
difficult starting and burning excess fuel/oil tells me there is an underlying issue.

06-08-2018, 01:44 PM	#1
nomogolf Not Yet Wild Join Date: Sep 2017 Location: Northwest Florida Posts: 17	Engine runs rich 1999 ezgo txt. Hard to start, pressing the pedal to the floor seems to flood the cylinders and plugs. I have to barely touch the pedal without any choke. Once started I notice black soot on the garage floor from the carts exhaust pipe. The carb is brand new 4 months ago. Is there a way to adjust the carb to lean out the mixture? Please advise. Any other remedy you guys can think of? Thanks in advance for your assistance.

06-09-2018, 10:26 AM	#2
Spicyunicorn Gone Wild Join Date: Jun 2015 Location: NW Iowa Posts: 1,669	Re: Engine runs rich Start with setting valve lash to .004"

06-11-2018, 10:42 AM	#3
nomogolf Not Yet Wild Join Date: Sep 2017 Location: Northwest Florida Posts: 17	Re: Engine runs rich Valves are set at 0.004 already.

07-07-2018, 12:25 AM	#4
Reca Not Yet Wild Join Date: Feb 2017 Posts: 10	Re: Engine runs rich Bump... I have same issue. I also get a backfire when. Coasting down a big hill
Reca Not Yet Wild Join Date: Feb 2017 Posts: 10

07-07-2018, 08:38 AM	#5
Gearhead1956 Gone Wild Join Date: Dec 2010 Location: Woodstock,GA Posts: 1,088	Re: Engine runs rich The first thing you have to do when buying one of these China carb's is take it completely apart soak it in carb. cleaner then blow it out with compressed air! These carbs are a hit or miss ( junk ) But what can you get these days for $20

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07-07-2018, 11:24 PM	#6
Reca Not Yet Wild Join Date: Feb 2017 Posts: 10	Re: Engine runs rich Is there a way to adjust the carbs?
Reca Not Yet Wild Join Date: Feb 2017 Posts: 10

07-09-2018, 12:51 AM	#7
Cartmaster British born Nincompoop Join Date: Feb 2007 Location: United Kingdom Posts: 2,461	Re: Engine runs rich First of all, why did you replace the carb, and do you still have the old original one. Gearheads advice is solid. Do it. And no, there is basically no adjustment apart from setting float height. Regarding backfiring, you need to make sure the carb is fully closed when the pedal is up. If you listen carefully as you slowly push down on the pedal you will hear the pedal switch click. the carb must be set to start opening AFTER you hear the click, not before.

07-09-2018, 10:54 AM	#8
Reca Not Yet Wild Join Date: Feb 2017 Posts: 10	Re: Engine runs rich I replaced my carb because when I got the cart the car. Was cracked so I had no choice
Reca Not Yet Wild Join Date: Feb 2017 Posts: 10

07-10-2018, 12:58 AM	#9
Cartmaster British born Nincompoop Join Date: Feb 2007 Location: United Kingdom Posts: 2,461	Re: Engine runs rich Fair enough. The aftermarket carb is most likely your main issue unless your inlet valves are sunk in the head, or you have worn rings etc. Next step should be a compression test as this will show up any major issues with valves and rings/bore. difficult starting and burning excess fuel/oil tells me there is an underlying issue.

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