I agree with Gary that it's not good to run with excess oil. Truth is, if you don't keep topping the oil up, it will burn down to the correct level quite quickly (and probably smoke more than you would like in the process).
I agree with John P that 1.9 litres is 2 US quarts and also second (or is that third) that the dipstick is probably not original or the tube cap has moved down the stick. When next you do an oil drain, put in the recommended 2 quarts and remark your dipstick at the known value.
Sandy, the guy who said that the oil is better too low than too high is not making allowances for motoring in heavy seas when the motor oscillates through a big enough angle to cause it to cavitate. Best keep the level where it belongs, it's not hard and it'll save some heartache.
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