I have a 1990 175 HP Mercury Black Max and my oil alarm keeps going beep beep beep all the time and I can't solve why it's doing it....I have read the manual and tried some things but to no avail...It appears that low oil in the supply tank to the motor is the only thing that makes the beeper sound on this motor.....Is that true?.....If I mix oil with my gas at 50 to 1, can I just let the oil supply reservoir run empty and not use it anymore?