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91 ski Nautique with Pro-Tec. Runs strong. After pulling skier at 36 mph oil light & buzzer comes on. Added extra oil pressure gauge on engine. Both read 50 lbs. changed oil pressure sender and oil pressure switch on Pro-Tec. Also it doesn’t go into limp mode when this happens. Never had a problem with Pro-Tec for 35 years and I’m not about to change over. Water temperature is fine and voltage is normal.
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