Re: 1998 OX66225 hesitation/stumble
A late update. I replaced the crank position sensor and retested with the winky blinky. The result was that it still showed code 14. I was able to borrow a Yamaha manual from a member on this board (JohnfromMadison) and spent about an hour going through it. It was when I was reading the wiring diagrams that I realized the problem. The 4 pin connectors on the O2 sensor and the crank position sensor are the same size, and can be interchanged. It appears that the folks that rebuilt the power head swapped the connectors so that both the O2 sensor and the crank postion sensor were not functioning. I only was able to find it because I figured out that the green wires from the crank position sensor changed to gray and black after the connector. The wiring diagram did not show such a color change.
So after several months of frustration, the motor is finally fixed!
