60 degree loopers didn't have many powerpack problems with them, but the optical sensor is known to cause issues. Also be certain to get the cover back on the flywheel for the optic sensor as any light WILL cause false readings in it. It's also not a good idea to run these engines with the cowling off due to the optic sensor getting falso readings from light that gets under the cover. Do you have a PRV meter? If so I would check the stator when it is acting up. Also get you a timing light and make sure to mark the flywheel for TDC on each cylinder on it. When it acts up take your test light and connect it to each wire and see which one is losing spark or jumping time. If it is all of them I would say it is the optic sensor.
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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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