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I had some backfiring (years back) with a Honda walk behind mower. Checked the valve clearances and found them out of spec...

Check and see if you have a burnt Exhaust Valve or possible Lazy Valve spring!!

According to the engine number, this is around 25 years old I'm guessing. The one thing I notice that has not been mentioned is the...

Is that .06mm or .06"? .06mm = .0023" Intake should be .004" Exhaust should be .006" Engine must be cold for setting valves

put them to .004 and verify the correct main jets. you have a left and a right and wouldnt be th first time ive seen high altitude jets...

Pliers with really thick rubber handle or just tie a zip tie to it and pull the zip tie

All good info here. I had a similar problem on my Scag TT 35hp Briggs. Sent it to 2 different shops and it got better each time but...

There was no water in the carb. It's kept under a car port. But here in Arkansas, that doesn't mean much, as we have high humidity all...

With a pressure/vac tester and the carb inverted. Like my Mityvac 8500

Hi slomo and StarTech, Thanks for uploading examples. Many of our followers are not aware of these strange testing methods that are...

I think I see the problem yours And an image from eBay Note the two sharp points on the part you receive that is not there on the...

Download Origin Ad Blocker for your browser. You are welcome.

How many hours on the mower, what year is it? Is it parked outdoors, any sign of vermin? Sounds like an mis to me not a backfire. Does...

Thank you. Also @Auto Doc's @Forest#2 and the others for this imput. That explains what I'm missing. Tester ordered.

Hi slomo and StarTech, Thanks for uploading examples. Many of our followers are not aware of these strange testing methods that are...