Have a 97 Yamaha 150 2-stroke on a 23ft deck boat. Want a 2002 w/a cuddie with 2 merc 90hp 4-stroke on it.also a 23ft. I'm very happy with the Yamaha 2- stroke with over 900 hrs on it, but want to upgrade to the 4-stroke engine,have read some of your articles on the 4-stroke and how hard they are to maintain, not to sure I'm doing the right thing.My friend is selling his seafox 23 for a good price, he is moving to Tenn thats why it's for sale. My Yamaha is the firt outboard I've had so I'm not to familar with the Merc engines. Would appreciate any help anyone can give me on this subject.<br /> llstep