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Old 03-18-2023, 05:43 PM   #21
trig123
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Default Re: 2004 TXT hard start

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Originally Posted by parks531 View Post
Have solid spark at both plug wires with the opposite attached to the other spark plug
I would think you can eliminate the spark and we can look at something else.
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Old 03-18-2023, 06:55 PM   #22
CP241
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Default Re: 2004 TXT hard start

Agree with trig

You never mentioned, how does it run once it starts and runs? Why was the carb replaced? Did it have this same issue with the old carb? Have you checked to make sure the timing belt isnít stretched or jump a tooth? Whatís the history on this cart? Did you buy it this way, or have you owned it for a while and it slowly got to this point or did it suddenly happen overnight?

Lot of unanswered questions here
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Old 03-18-2023, 08:43 PM   #23
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Default Re: 2004 TXT hard start

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Agree with trig

You never mentioned, how does it run once it starts and runs? Why was the carb replaced? Did it have this same issue with the old carb? Have you checked to make sure the timing belt isnít stretched or jump a tooth? Whatís the history on this cart? Did you buy it this way, or have you owned it for a while and it slowly got to this point or did it suddenly happen overnight?

Lot of unanswered questions here
It runs great other than a small amount of backfire through the carburetor at the start of engine. ( Once it gets warm it's non existent) this backfire through the carburetor just started after a full genuine clean of the carburetor 2 weeks ago (venturi tube was cleaned with stranded wire). Microswitch clicks before the throttle moves on Carburetor. Carburetor was replaced by me 2 years ago when I purchased it due to a hard start, I put a cheap Chinese carburetor on it and had many issues and took it to a shop which replaced it with the ezgo service kit carburetor that is mentioned in my prior post. Hard start has always been an issue since I've owned the cart. Haven't checked timing belt whatsoever ever, any input on checking it/ correct timing?
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Old 03-20-2023, 06:33 PM   #24
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Default Re: 2004 TXT hard start

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It runs great other than a small amount of backfire through the carburetor at the start of engine. ( Once it gets warm it's non existent) this backfire through the carburetor just started after a full genuine clean of the carburetor 2 weeks ago (venturi tube was cleaned with stranded wire). Microswitch clicks before the throttle moves on Carburetor. Carburetor was replaced by me 2 years ago when I purchased it due to a hard start, I put a cheap Chinese carburetor on it and had many issues and took it to a shop which replaced it with the ezgo service kit carburetor that is mentioned in my prior post. Hard start has always been an issue since I've owned the cart. Haven't checked timing belt whatsoever ever, any input on checking it/ correct timing?
3-20-2023 Correction no backfire at all (must of been fuel sitting in the carburetor while doing some of the diagnosis, it was nice enough outside today and went for a drive. No backfire, had power, started somewhat better (little use of choke to start) but it is running rich! Has new NGK plugs, thoroughly cleaned carburetor. Any input would be helpful. Thanks!
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Old 03-20-2023, 07:03 PM   #25
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Default Re: 2004 TXT hard start

How old is the gas? Do you use a stabilizer? Iíve noticed on my generator if I just use gas it fires right up with the auto choke. But if I use stabil it has a hard time with the initial start
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Old 03-20-2023, 07:08 PM   #26
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Default Re: 2004 TXT hard start

Also something worth trying just to see, open the airbox lid for a cold start sand see if it starts any easier with the lid removed
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Old 03-21-2023, 12:17 PM   #27
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Default Re: 2004 TXT hard start

Possibly something restricting flow at the muffler. Rich on these generally means restricted air flow someplace, intake/filter, or muffler closed off. Crushed tailpipe, mud dobber nest in the exhaust pipe, etc. Since it is 4 stroke, not likely oil build-up.
Another possibility is poorly adjusted carb linkages that don't allow the carb to open all the way, or not open and close at the correct timing. Carb open on shut off causes backfire. I had one fight me due to the square plastic cable retaining clip near the carb simply wasn't fully snapped into the steel mounting bracket.
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Old 03-21-2023, 03:08 PM   #28
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Default Re: 2004 TXT hard start

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Originally Posted by CP241 View Post
How old is the gas? Do you use a stabilizer? Iíve noticed on my generator if I just use gas it fires right up with the auto choke. But if I use stabil it has a hard time with the initial start

It has a fresh tank of ethanol free fuel in it. I took the tank out and cleaned it after see how much junk was in the inline filter and in the bottom of the tank
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Old 03-21-2023, 03:10 PM   #29
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Default Re: 2004 TXT hard start

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Originally Posted by CP241 View Post
Also something worth trying just to see, open the airbox lid for a cold start sand see if it starts any easier with the lid removed
I removed air box lid and filter removed on a cold start and it was the same as it was out together. Starts much easier, very little use of choke. Runs awful rich is my biggest concern. Intake valves or timing belt possibly is my thoughts from post on here
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Old 03-21-2023, 06:39 PM   #30
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Default Re: 2004 TXT hard start

Ok so letís try thisÖ trust but verify

Take the main jet out of your carb and look at it closely. It should have either an 80, 82, or 90 stamped into the side of it in small numbers.

Ezgo carbs are hard to absolutely identify as oem too because they donít clearly have mikuni or keihin stamped into the body.

As JP said that little square clip thing can be a real PITA. Also make sure the cable routes between the starter and the motor so it goes STRAIGHT up to that stupid black clippy thing. Otherwise the cable can bind and it wonít be happy.

I also know this is a mci and theyíre not common for the valve wear like pre mci but maybe if you could get a picture of the valve adjusters clearly showing the threads on top of the lock nuts. Even the mci if theyíre run hard, with governor cranked, and have a bunch of hours the valves can still wear.
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