Troy built TB110 with Briggs engine surging and running rough

Replaced the carb, started up strong thought everything was good2go then it started sounding like it was gonna die then rev up again for almost a minute or two. Kept it running while I looked at things and after about two minutes it shot some fire out of the exhaust which my kid thought was cool lol. What else can I try? Got a new carb, new spark plug and checked the gap, fresh oil, fresh gas and brand new air filter. Checked the flywheel brake and key everything seems to be good. There is two video links, the one with the cover shroud on was the first, the butterfly was staying pretty consistent and not going crazy. It was still running as it should and backfired every few min. After that video and I took the cover off again I realized I didn’t put the black tube that connects to the air filter housing back all the way on. I thought that was the issue, pushed it all the way on (it was kinda just resting on the connection definitely not airtight) so the second video with the cover off was after connecting it all the way. That’s the only change besides the cover being off. The butterfly was surging again like crazy.


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After reconnecting the black tube that goes in back of air filter housing.

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CrusinSusan said:
I looked everywhere for a code date on the mower and on the frame everywhere and couldn’t find one. Any other way to tell? No numbers anywhere that are even close. I’m ok with learning , YouTube is a great resource. You win some and you lose some but that’s how I learn. Still looking for the answer of what I’m explaining is or isn’t the reason for the butterfly to be spasing out.
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Date CODE is the CODE number which is after the Model & Type numbers
so after the 09P702-0144-F1 number you posted will be another 8 character number which is YYMMDD(factory id )
 
bertsmobile1 said:
Date CODE is the CODE number which is after the Model & Type numbers
so after the 09P702-0144-F1 number you posted will be another 8 character number which is YYMMDD(factory id )
Click to expand...
Bert I’m trying to find the valve clearances on this engine. I don’t see it online. I see a 9A, 9B, 9D but no 9P. Do you have any suggestions? I was guessing an average after looking at a few of .004 but I’d still like to know for future reference how to locate it if I’m looking at the wrong set of model series numbers. Thank you!
 

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Is there supposed to be oil in the valve area? It’s not a lot but would just like to know if this is normal? Is it normal for an engine in 100% shape or normal for a old engine? Thanks guys!
 

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