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Briggs V-Twin has uneven exhaust temps and pops

10215 Views 11 Replies 5 Participants Last post by  RideoutKSC
I have a 20hp V-twin Briggs and Stratton that has been giving me problems ever since I bought it as a project back in April.

I have replaced the governor, a gear in the transaxle and most recently rebuilt the carburetor but have had one problem this entire time.

The left cylinder exhaust header glows red. The right cylinder exhaust seems to run cool and pops occasionally. From low to mid throttle the engine runs smooth, but anything otherwise and it pops (from the right side only).

I tried adjusting the valves but nothing changed and I'm not sure if I did it correctly. Assuming I DID adjust the valves correctly, do you think there could be other issues at play here?

Thanks in advance,
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I can send you a Service Manual for the engine IF you like, address below, put in proper format and remind me, engine model number and what you want.

Walt Conner
wconner5 at frontier dot com
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