Congratulations!
I second the advice to replace the nylon thru hulls ASAP. The nylon degrades from UV exposure. My 1994 228G Seafarer had 2 cracked and leaking thru hulls when I replaced them all in 2007. The replacements were stainless so should last the life of the boat. Agree that GW, a premium boat builder, should have used bronze (don't think stainless was available back then) instead of nylon. Note I did not have to replace the scupper thru hulls as they were painted on my hull so protected from UV. Check your throttle and shift control cables between the transom and the engine for rusty looking cracks in the plastic - if they are original then likely due for replacement. On the engine, if the thermostats were not replaced, replace them. If the water pump impeller has more than 4-6 years on it, replace it. Check your fuel tank sender(s) for rational behavior - I had to replace 4 senders (2 each on my two gradys) in the last 12 months, likely due to ethanol.
www.wemausa.com is the place for replacements. Check your seacock pushrod's balljoint where the pushrod meets the seacock lever - if its still working, spray it liberally every three months with boeshield or similar to keep it alive. See my other post on how to repair at
http://www.greatgrady.com/forum/viewtop ... highlight= .
All engine parts, control cables etc I get from boats.net - great web site with exploded parts diagrams for your engine, discounted prices, and everything I have ever ordered shipped from stock and arrived within days. I highly recommend them. Hull fittings (thru hulls etc) I get from starboardsupply.com.
Good luck and have fun!