i have a 30 ft sea ray weekender 1987 with twin 350 mercs. purchased it this spring and believe it was very well cared for. in checking the transmission fluid level it is ok and clean but i don't know when it was last changed. can someone please tell me how often it should be changed and capacity of the resevoir. same question for the engine oil. engines have 700 hours and run strong. this is my first boat. would appreciate any advice on maintaining the 350's. any quirks about them i should be aware of. i enjoy this forum and any feed back on 350's would be great. as columbo would say "just one more question". are there any sea ray clubs in the st clair shores area. kinda anxious to make a few short overnite trips this summer with others that own sea rays.