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Fresh water flush issue on 200HP OX66

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  • Fresh water flush issue on 200HP OX66

    Hello All,

    Posted this in a different thread and was advised to start new thread...

    I have recently purchased my first boat with a 2003 Yamaha 200 OX66 Saltwater Fuel Injection. The engine only had 102 hours.

    I had the boat inspected prior to purchase by a Master Tech and it came through w/flying colors. Even compression, good VST, etc.

    I have since put on approx 12hrs in the Atlantic. It has run like a top, no hesitation or alarms, etc.

    I obviously need/want to flush the engine to ensure the removal of any salt in the engine. I can run it on muffs and it will "piss". Ran it for approx 7 min and no alarms or issues although the lower unit was very warm. Engine was warm as I had run it for the previous 2 hrs. As I said it ran great and was "pissing" while under way and on muffs. (*NOTE: It's on a slip which makes the muffs a bit difficult).

    **My question is when I try to run it with the flush at the garden hose connection on the base of the cowling it will not pee.

    In fact the hose from the dock eventually causes the connector on the engine to disconnect causing the fresh water to spray across the marina. I am not running the engine and it's in the up position per the owners manual.

    I have used the paper clip/weed wacker twine/coat hanger trick in an attempt to dislodge anything in the lodged in the pee hole with no luck.

    I feel like I'm doing myself and my engine a disservice. Would appreciate any and all help as everything I've read here, on THT and other sites has not spoken to this particular issue.

    Thanks.

  • #2
    While your on the lift, remove the cowling and tilt the engine some so it' easier to access.

    Now, follow the hoses (and clean as need be).

    Start at the flush attachment and work "inward" from there. If you have a small air compressor, that would make things a bit easier too...

    If its on a lift,(completely out of the water), you don't have to tilt the engine. Tilting is so the fresh water can flush the LU too (and salt water not stay in the LU)
    Scott
    1997 Angler 204, Center Console powered by a 2006 Yamaha F150TXR

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    • #3
      maybe Someone can tell you right off hand how the TT is plumbed up, but if not see if you can trace it by hand.
      I would think if it comes out when running it is clear, but maybe with the hose it comes from a different side and does not get the pressure needed to push it out the TT

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