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  1. #1
    Been around for years...seen it all Kawi-Guy's Avatar
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    Honda shuts down after going above 30mph, shows water graphic on display

    Hi guys,
    Well I got my exhaust manifold installed and got everything put back together on the ski, it starts up fine and idles on the hose and water just fine. We launched it and it runs great, until you get it just above 30mph. Then the Water temp picture shows on the gauge, the ski shuts down, and it beeps. The FI light does not come on, just the water temp. light.
    After the ski sits a minute you can ride it again until you get around 30-40 mph, then it shuts down again and the beeps start.
    We changed out the exhaust manifold sensor with a spare from the old exhaust manifold, they both did the same thing.
    Any thoughts or ideas?
    Thanks for the help


  2. #2
    JRINJAX's Avatar
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    Quote Originally Posted by Kawi-Guy View Post
    Hi guys,
    Well I got my exhaust manifold installed and got everything put back together on the ski, it starts up fine and idles on the hose and water just fine. We launched it and it runs great, until you get it just above 30mph. Then the Water temp picture shows on the gauge, the ski shuts down, and it beeps. The FI light does not come on, just the water temp. light.
    After the ski sits a minute you can ride it again until you get around 30-40 mph, then it shuts down again and the beeps start.
    We changed out the exhaust manifold sensor with a spare from the old exhaust manifold, they both did the same thing.
    Any thoughts or ideas?
    Thanks for the help
    The exhaust maifold sensor makes a hard shutdown. The other overheat sensors cause it to buck and stutter along until you reset the lanyard. You may have bad wiring or ECM.

  3. #3
    Been around for years...seen it all Kawi-Guy's Avatar
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    See post just below

  4. #4
    Been around for years...seen it all Kawi-Guy's Avatar
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    This is a hard shutdown ,
    JR, do u think I should start with a new sensor on the exhaust manifold ? The first one we tried was already attached to the used exhaust manifold I just bought, the second one was on the manifold tha had the hole in it.
    I unhooked the temp sensor from the wiring connector while the ski was running on the hose and the ski shut down instantly. Plugged it back in and it runs fine on the hose

  5. #5
    JRINJAX's Avatar
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    Find someone with a cheap infa-red thermometer and ride it with the seat off. Use it to find out what the surface temp of the manifold is when it trips. There could be a sand blocked/salt blocked cooling passage. One of mine had a huge salt crystal blocking the inlet to the water tube that dumps into the exhaust from the top of the manifold.
    I have also seen many Honda heads full of sand too.

  6. #6
    Been around for years...seen it all Kawi-Guy's Avatar
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    Now you have me worried

  7. #7
    Been around for years...seen it all Kawi-Guy's Avatar
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    I was wondering if an ECU from a 2004 r12x would work on the 2005 f12x.
    r12x ecm ( ecu) Part # is 38770-HW3-673
    f12x ecm (ecu) Part # is 38771-HW1-691

  8. #8
    JRINJAX's Avatar
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    Quote Originally Posted by Kawi-Guy View Post
    I was wondering if an ECU from a 2004 r12x would work on the 2005 f12x.
    r12x ecm ( ecu) Part # is 38770-HW3-673
    f12x ecm (ecu) Part # is 38771-HW1-691
    It might if they have the same connectors. Someone once said the only difference between a late model R and a late model F is just some of the map settings.

  9. #9
    Been around for years...seen it all Kawi-Guy's Avatar
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    Thanks for y our help on this JR, I'm going to see if I can remove the head on the ski to see if there is any sand in there or a buildup of crud/salt.

  10. #10
    Been around for years...seen it all Kawi-Guy's Avatar
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    Just rechecking my cooling lines, Does the water cooling hose that exits from the intercooler go directly to the Exhaust manifold ? Its a long hose with 2 bends in it. Just making sure I have it connected in the right spot

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