Vanguard 23hp twin will not start

Jloven14

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Aug 13, 2022
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I have a 23hp twin vanguard B and S engine with 170 hours. Had to replace the head gasket. Put head back together and set the valves. Ran for 30 seconds or so backfired, and died. Did this 4-5 times. Readjusted the valves and it ran ok. Put the shroud back on the engine and now it will not hit at all. I have fire on plugs (used inline spark tester), compression test shows 120 on both cylinders, and plugs have gas on them. I have used new plugs and new mags. Thought the backfire might have messed up timing so I took case apart. Gears lined up perfectly and flywheel key is in place. Also replaced key switch. Any thoughts or ideas? Thanks
 
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