i would say yes, most motors are 100 to 1 oil at idle, 50 to 1 at top speed, so when you come in thur a no wake zone you foul the plugs a little, so when you start the extra oil has to burn off.
when i disconnected the oil injection on my old yamaha it would foul the plugs every 3 trips, always had spares, and changed them out. then cleaned the used ones and reused the next time.
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1986 V20 
Old Fishermen never die, we just SMELL that way!!
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