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Discussion Starter · #1 ·
I'm helping my neighbor with his L120 (might be a LT120, decals are gone) running a B&S 20hp Intek V-twin. It seems to have power but it will pop through the carb once every 30 to 45 seconds and hunts/surges at high speed.(rpms) We've had the Nikki carb off and soaked it for a day in a bucket of carb cleaner, we then adjusted the rocker clearance,(the clearance was way out of spec). The engine seemed a little better after the valve clearance was restored but after a few minutes it was popping again.
Any thoughts?
Thanks
E.
 

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Discussion Starter · #3 ·
Roger,
As always thanks for the reply. I looked tonight at the ID tag. This L120 is a 2004 model. I highly doubt anyone ever had the rocker covers off before me so you are probably right about a burnt valve.
The clearance was at about .011, we re-set it to .004 as this is the spec we found on-line at B&S.
Thanks.
E.
 

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I put the helper spring in the 110 last night. Is it normal for the spring to sit on top of the cross shaft for the brake or do I have the wrong mounting bracket?



(Message edited by treed on October 11, 2014)
 

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Here is how it looked on a 71 110 parts tractor I got
 
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