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It only has a few hours on it and may have been stored for an extended time with fuel mix in it. It starts quickly but when I give it full throttle it bogs down. If I pump the throttle lever it seems to run better. See video for details. https://youtu.be/V9IC5inkru8

Here is the disassembled cardenter image description here

Paul
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2 Answers2

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I finally figured out what the problem was. The carb kits came with a new spark plug so I replaced it at the same time as the carb. Apparently the plug was bad because when I put the old one back it it ran great! Problem solved. Thanks for all the suggestions.

ThreePhaseEel
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Paul
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You said:

may have been stored for an extended time with fuel mix in it

These sorts of engines are VERY sensitive to storage with Ethanol-containing fuel in them. Your carburetor is almost certainly damaged or clogged and needs to be replaced or cleaned and rebuilt.

Do not EVER store such equipment without draining the fuel first and I've found it helpful use use E0 fuel (i.e. 0% Ethanol content) at all times. You can buy this at most home centers and hardware stores (See "TruFuel" or similar) brands or at gas retailers such as marinas and Farm Bureau Coops that sell E0 gasoline.

jwh20
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  • I will try pulling the carb off and if I can't clean it I will buy a new one. Is it ok to store non ethanol fuel in it? Do people use 50:1 ratio? – Paul Nov 29 '20 at 02:48
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    It's best to store it drained of all fuel but E0 (i.e. non-ethanol) has a longer shelf-life then E10. The Ethanol absorbs water from the air and that causes the solution to separate. The Ethanol/water mix settles to the bottom and is very corrosive and forms a hard varnish over time. Don't guess on the ratio of fuel to oil. Use EXACTLY what the manufacturer of the engine calls for. 50:1 is common but by no means the only possible mix. I have a 50:1 but also a 40:1 and a 24:1. Using the wrong mixture will damage the engine. – jwh20 Nov 29 '20 at 10:54
  • Any suggestions on how to clean it? Carb cleaner, wire. I don’t have access to compressed air – Paul Nov 30 '20 at 12:31
  • The fact that fuel clogs carbs during storage has nothing to do with ethanol. It's a matter of residue left when the fuel dries out of small passages. – isherwood Nov 30 '20 at 15:11
  • I'd try running a dose of Seafoam through the fuel. That has spared me a carb teardown on a few occasions. Otherwise, disassemble, soak, scrub, reassemble. Keep track of jet settings as you do. – isherwood Nov 30 '20 at 15:12
  • Any suggestions on what to soak it in? – Paul Nov 30 '20 at 16:54
  • It's been my experience that no amount of soaking or running products through the tank will resolve this issue. The plastic and metal parts in the carburetor are damaged and need to be replaced. But you can try it. Seafoam, acetone, brake fluid, carb cleaner, WD-40, etc. can all be tried. – jwh20 Nov 30 '20 at 21:56