Runs with choke

Knots

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I have a B/S 12.5 hp vertical engine on a splitter. Model 219802, type 0117E1, code 05102ZA.
After head gasket replacement, engine runs fine but only if choke is about 1/3 on.
Opening choke on warm engine causes the engine to make a popping noise. Popping is random (it does not pop every time the engine fires) and happens every few seconds. I am thinking that it is running lean and maybe main jet is partially clogged. Any guidance would be appreciated.
Thanks,
Knots
 

Scrubcadet10

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did you reset the valve clearance after you put the headgasket on?
 

StarTech

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Also can be a bad or missing intake manifold gasket.
 
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