The QL77JC4's are actually better for idling as they don't load up as bad. NGK's will run like CRAP in a JOHNNY-RUDE, stick with CHAMPIONS. Do you have a spark tester that uses the adjusteable gap? If not go to ADVANCE or AUTOZONE and buy one and see how far it will jump spark. These engines need a HOT ignition, if the stator gets week the idle WILL suffer as these engines don't use a 2 stage stator like a MERC does. Also check your magnets in the flywheel to make sure none have come loose.
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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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