2001, 225HP Mercury EFI 2-Stroke runs well except oil indicator alarm continues to sound. Alarm is 4 beeps every few minutes plus oil alarm light remains on in boat dash board. Replaced sensor in engine oil tank and float appears to work OK. Engine oil tank remains full. Engine smokes normally when starting, etc. Boat is a 2001 23ft Pro-Line Walk. Experiance or ideas for solving this problem would be very helpful.
