The only thing I've replaced on it in the last 5 years is the spark plugs. That said, the carbs will need a little tinkering in order to get it running top notch. Right now it runs great, but it doesn't always like to start when hot. It seems like it's flooding itself after shutoff. It will start after 30 seconds of cranking with the throttle wide open. It smokes all of the extra fuel in the cylinder and then runs like a bat out of hell.
Last weekend I went out to see if she would start after sitting since September, and she fired right up. I didn't run it in the water, but it's more or less ready to go.