SX200TXRY is the model. Which tells us much more than just Saltwater Series II. In less words. lol
The spark plug that is specified by Yamaha for your model is an NGK BR7HS-10. Four bucks a pop at Advance Auto...
There is a plastic clip that holds a link in place between the throttles and the oil pump. If that clip breaks the oil pump will default to the maximum oiling position. The clip is known to age with time, get brittle and break.
I would check that.
Teleflex Morse comes to mind.
https://www.google.com/search?q=teleflex+electronic+controls&oq=teleflex+elec&aqs=chrome.0.0i512j69i57j0i512j0i22i30l7.4314j0j7&sourceid=chrome&ie=UTF-8