Downtime, I have a older tracker 05' with the 50hp 2 stroke, had the 3 carbs rebuilt soon after I bought it $600 and it runs and starts well, but I will tell you the best thing I have done is to run pure gasoline in the boat (no gas station junk) it cost a couple more dollars a gallon, but in my opinion money well spent. The gasoline today is not good with any engine that sits idle for long periods of time, I use pure gas in my log spliter, boat snow blower etc..