Airens emperor 8 running lean

Airens emperor guy 76

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hey so my 1976 airens emperor 8 is running lean and it wont mow smoothly, ive tried everything and it wont mow right, so whats going on with it
 

Scrubcadet10

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So it's surging?
lean running is too much air not enough fuel, or not enough fuel, period.
First i would check for vacuum leaks which are usually caused by failed gaskets that suck extra air into the fuel mixture.. i use WD40 in a trigger spray, saturate the carb/intake mounting area.. if any change in engine speed or it blows white smoke... you have air leaking into the intake.
It can also be caused by a blocked/clogged jet in the carburetor which entails removal, disassembly and a good cleaning.

what engine is on this unit?
 
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