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I have a 25HP Riding mower. I noticed the last time I used it, it started making a popping noise through the exhaust at the higher speeds. When it idles it seems to be fine.I replaced the fuel filter and cleaned the plugs and filter. Any ideas before I start digging into it.

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I would check the exhaust and intake valves clearance. The exhaust valve may be leaking and sometimes improper valve clearance will cause this. Also a dirty carb can cause it to run to lean at high speed and make it do this sometimes.

Posted on Sep 15, 2010

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Posted on Jan 02, 2017

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