Hey GregP. I would be interested in your findings when you get your props done. I purchased a 97 330 this year and noticed the same things. Gas consumption, more thrust coming from one side and slightly off throttles. Keep us posted. Thanks!
This may help. I'm looking to replace mine as well this spring.http://clubsearay.com/showthread.php/73651-1997-330-DA-Refrigerator-Replacement?highlight=Replacement+refrigerator+1997+330+Sundancer