Need some help, Backfires when given gas.

[geezer101]

Sounds like you may have more than 1 issue with the carb. Has it been overhauled? Take the air cleaner off, pull the throttle open and closed and look down the primary throat for a shot of fuel that should be coming from the side of the venturi out of a small jet. No fuel = accelerator enrichment pump is dead. If you see a trickle of fuel that means it's blocked. What fuel are you using and are you using the factory recommended tune? The factory tune is garbage.

[FenstermakerWJ]

Sounds like you may have more than 1 issue with the carb. Has it been overhauled? Take the air cleaner off, pull the throttle open and closed and look down the primary throat for a shot of fuel that should be coming from the side of the venturi out of a small jet. No fuel = accelerator enrichment pump is dead. If you see a trickle of fuel that means it's blocked. What fuel are you using and are you using the factory recommended tune? The factory tune is garbage.

Whole carb was rebuilt 5 years ago and ran fine until now.

It shoots fuel strong when you pull on the throttle.

Fuel is 89

Not sure on the tune, I'd imagine factory just since it was rebuilt by a shop.

Oh and I noticed idk why I didn't bring it up before, this never looked right to me, but could not compare it to anything. When I was a younger and my father owned it, looking under the hood out of boredom lol, I would swear that these two ports had something going to them, but since it was rebuilt they where plugged... But can't find any info, I had a shop re-install the carb 5 years ago... If I would have to guess maybe the fuel line from the return on the fuel pump went to one then the other one to the return? I bet this could be the culprit....
If anyone knows how it should go then let me know.

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