[Zebra]

I talked to my yamaha dealer and he says the OX has something to do with the altitude adjustment. He's got a 2001 Yamaha 150 carb for $5,995 installed I would need a control box for another $300 since i run a 200 johnson, looks like you got a good deal. Good Luck with it. Ck. compression and lower unit. Watch them do it if they let you and learn. Knowledge is a great thing... but dumb and lucky works too. Guess i'll just run mr. johnson till it dont run no more.