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Old 03-25-2020, 04:04 PM
SpeedDemon1990 SpeedDemon1990 is offline
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Default Engine won't start/stay running/smells of gas

Good evening,

I have a 33 year old Manco Dingo go-kart that is having problems. I am not an expert with engines by any stretch but I was wondering if I could get some help. I took the engine to get fixed because it would not start. It had been sitting for months(5 months). It would not work after that. I took it to a shop and they got it to start. It now refuses to start after starting yesterday. It would stall out after a while of riding, but I have gotten used to this. It made a VERY loud screech that came from the engine so I stopped and checked the engine. I never heard the screech again. It smells of gas when I am pulling on it to start. It also seems to be leaking oil but I am not sure from where I am wondering if my engine is just giving up at this point. I am going to change the oil in it tomorrow. I also would love some recommendations for quality engines that I could stick on my go-kart. I don't want to spend a fortune, but I would like the engine to be able to give me a good ride. Thank you all for your help.
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Old 03-25-2020, 04:27 PM
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Hello from one SpeedDemon to another!

Sounds like you have a dirty carburetor, and/or old gas. Take the carburetor apart and give it a good cleaning. Then drain the fuel tank and lines and replace it with fresh gasoline.

The screech was most likely the clutch bushing, work some oil into the clutch bushing every time you ride.

When you check the oil, check for metallic, shiny flakes, which indicate BAD things inside your engine.
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Old 03-25-2020, 05:19 PM
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If what JT says doesn't help, and you find metal shavings in your oil leading to replacement, most here will vouch on a predator 212 from harbor freight, you can regularly find coupons for $99 +tax. They are cheap, clone a honda and are reliable for the money. With a simple removal of the governor and correct gearing, you could have your dingo cruising right around 40mph. Now for the important stuff, we all want pictures!
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Old 03-25-2020, 05:41 PM
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If its a clone type engine... its a Honda clone not Harley... It dont leak typically...
Check to see if its not gas mixed into the crank case... if so, you probably forgot to close the petcock when it sat still....
For whatever reason these engines like to weep a bit with the float doesnt totally shut off.. then it seeps the gas into the throat and down into the crankcase...
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Old 03-25-2020, 06:59 PM
SpeedDemon1990 SpeedDemon1990 is offline
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Here's some pics
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Old 03-25-2020, 07:00 PM
SpeedDemon1990 SpeedDemon1990 is offline
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More
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Old 03-25-2020, 07:01 PM
SpeedDemon1990 SpeedDemon1990 is offline
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A couple more
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Old 03-25-2020, 07:02 PM
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I apologize for the pictures being sideways.
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Old 03-25-2020, 09:20 PM
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Ahhh a Briggs... And a medium flo-jet carb..
That will be more JT's realm..
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Old 03-26-2020, 01:47 PM
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Update. I changed the oil. It was jet black, put in fresh oil. No metal detected in oil. Go-kart still hates to start. I have to crank it while someone presses on the accelerator to get it to rev up to stay running. It eventually just putters out after a couple of laps around the yard.
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Old 03-26-2020, 02:03 PM
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Oooh, a Briggs 8 horse! That one is the ball bearing variant! Built in 1989, probably the original engine. I love Briggs flatheads!

As mckutzy said, you have a Flo-Jet carburetor. I've had just about every possible problem with mine, so I should be able to help you out.

Check out the picture of your carb I edited. Try wiggling the throttle shaft where it's circled. If you can feel really any perceptible play, you most likely have a vacuum leak.

As for it smelling of gas, I think there are multiple problems, as I have had the same problem, accompanied by a gas leak.

Check out this video and try this method, frequently the emulsion tube is not sealed correctly, and this method worked for me.





Another thing to try would be to lap the mating surfaces of the carburetor. Where it comes in half. I simply took a single cut file and took some time leveling it all out. See my picture, the shiny areas are where I filed it flat.
What frequently happens, is that the body is screwed together unevenly or too hard, and the body actually WARPS from the stress. This helps reverse that. I also used an adjustable wrench to carefully bend it back ever so slightly. But be very careful with that method as you could snap the carburetor.

To check if it's warped, take the carburetor halves apart, then put them back together, minus the gasket. You shouldn't be able to see light through the other side. Mine ended up with just a little bit poking through, but it was good enough.


Hope this helps! Let me know if you have other questions!
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Old 03-26-2020, 03:59 PM
SpeedDemon1990 SpeedDemon1990 is offline
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Thank you for the help. I greatly appreciate it. I have a friend who is going to help me with this. Is there any chance in your mind the engine is just giving up? In your opinion?
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Old 03-26-2020, 05:23 PM
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I doubt it, Briggs flatheads are real workhorses, and just about anything can be repaired or replaced on them, minus the block. Not only that, but there is an extensive network of NOS parts available if you know where to look.

Flo-Jets last essentially as long as the castings don't break. Just about every single part is replaceable. Supposedly some Flo-Jets can even outlast the engines they originally came one!

So I'd say: your engine may need some TLC and some hard work, but it should have long life left.
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Old 03-26-2020, 05:30 PM
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I have an old '53 briggs #14... it has a similar carb to it as yours...
Id look at all of the YT vids out there on these carbs to get a good understanding of them...
They're kinda different from alot of others..
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Old 03-26-2020, 05:34 PM
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I have one more question. What type of repair kit for the carburetor? Rebuild kit, I should say, if I need to replace anything in it?
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Old 03-26-2020, 06:40 PM
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Here's a link to the parts manual for your engine: https://outdoorpowerdirect.com/pages...2-5535-01//1/y

You need carburetor kit number 492024.
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Old 03-27-2020, 10:28 AM
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Wow lol. I have 8hp industrial plus and it needs a little help as it needs tuned and some other stuff
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