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  1. #1
    Member
    Join Date
    May 2012
    Location
    Indianapolis, Indiana
    Posts
    865

    O2 sensor life span

    For those of you who have had the older Yamaha two strokes with the O2 sensors, what is the typical lifespan of the sensor?
    I purchased my '03 Yamaha, original outboard on my '04 Ranger, a year ago last August. Last winter I went through the motor, replaced all the filters, had the injectors gone through by Brucato and I pulled the O2 sensor, cleaned everything and reinstalled it. The O2 sensor was really clean. I have no idea how old this sensor is.
    Just trying to decide if I should go ahead and replace it or maybe buy everything to replace it and wait until it starts acting up.
    2004 Ranger 519VX
    Yamaha VMAX 200HP OX66

  2. Member
    Join Date
    Apr 2015
    Location
    ponchatoula la
    Posts
    1,490
    #2
    My 03 lasted until last year. About 600 hrs on it. Always run ringfree. I bought a new sensor and ran the old one until I needed it

  3. "OVER THE LINE SMOKEY!" headhigh's Avatar
    Join Date
    May 2008
    Location
    Moyock, NC
    Posts
    6,209
    #3
    If it's clean and you're not seeing any performance issues, keep running it.
    1998 Ranger R93
    1998 Mercury 200 EFI

    "Life, liberty, and the pursuit of happiness."