Why does my B&S engine pulsate?

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Where is the video on You Tube?

 

[Rivets]

Just look at section 3 of this manual. It will tell you everything you need to know.

http://dl.dropboxusercontent.com/u/12502267/B&S Service Manuals/01_270962SingleCylinderLHead.pdf

 

[briggs]

I assumed that by pulsing he meant surging. Haven't seen lawn mowers with pulsa-jet carbs. These carbs were used on horizontal crankshaft engines.

yes u are right opps i stand corrected they are a vacu jet carb but i did say replace the diaphram gasket .....