pull the rocker arms and retest. i've seen this twice back when ethanol 1st hit the pumps. the goo in the tanks at the station gummed up the valves which hung them open, and allowed the rocker to kick off. a collapsed lifter normally will not hang a valve open, or cause a rocker to fall off the valve stem. sounds to me like a gummed up valve caused the valve to stick open, and give enough play to allow the rocker to kick off. also, replace the pushrod while your there. i HIGHLY DOUBT a collapsed lifter caused this.
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2011 SUNDANCE B20CCR SKIFF, 2011 YAMAHA 90HP 4 STROKE, 2011 KARAVAN SINGLE AXLE ALUMINUM TRAILER, LOWRANCE ELITE-7 HDI, MINN KOTA RIPTIDE TROLLING MOTOR
2000CC HYDRA-SPORT 225+HP EVINRUDE SOLD 
AND THE PINK JEEP!!!! R.I.P.
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