Ok first can anyone tell me where I can actually find a full service manual for an aq131a/275 engine and outdrive. Don gave me a great link for the operators manual but its just not quite in depth enough. Unless someone feels like walking me through it. I want to start looking into changing the bellows and changing and the out drive oil before the warmer weather hits. I also need to find where I can find a replacement raw water filter. Thanks for everyones time in advance. any comments are always appreciated.