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  1. #1

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    how cold of a weather can you run a TR-1 motor

    2021 Superjet is my 1st 4 stroke PWC. How cold of an ambient and water temp is safe to run this Superjet that is equip with the TR-1 motor? Reason I ask is I live in New England and I ride pretty much from March to December, as long as the sun is out and water not frozen I ride.. All my standups in the pass are 2 strokes and I usually tuned them on the rich side to compensate the cold and denser air and restrict the water flow a little to compensate the ice cold water. Is the TR-1 ECU sophisticated enough to control the fuel delivery with air temp changes and control cooling flow with water temp changes?
    Thanks in advance.

  2. #2
    Click avatar for tech links/info K447's Avatar
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    Does the owner’s manual specify a minimum operating water temperature?


  3. #3

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    nope

  4. #4
    MSX 150 guy lives on Mr. GP1800's Avatar
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    You should be just fine.

  5. #5
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by Mr. GP1800 View Post
    You should be just fine.
    Not the TR-1 engine, this is our Yamaha 1.8 engine riding in cold water

    http://greenhulk.net/forums/showthre...=1#post3146582


  6. #6

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    wow.. that's cold water. anything you need to do or just ride.

  7. #7
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by jetskidude1113 View Post
    wow.. that's cold water. anything you need to do … ?
    Let the engine warm up gently, then start riding at medium slow, just on plane. The engine will warm up and run just fine. *

    Stay close to the launch point for the first little while, so you can confirm the engine is behaving, and there are no leaks or other weird problems occurring. Also that you are going to be warm enough.

    Ride at moderate speeds. Not just for the super cold water.

    Nobody else is out there (certainly not very many other boaters). If you hit something in the water, ingest something into the jet pump, damage the ski somehow or become ejected, it is all on you to recover. By yourself.

    Nobody is going to be coming quickly to help, and no-one may even notice you in trouble.

    Do not attempt any new high speed record numbers, just enjoy the ride.


    * If you are running in early spring on last year’s gasoline, the fuel octane may have degraded a little during storage. Another reason to be gentle with the throttle.

  8. #8

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    Thanks for the tips.Yes, I always triple check before a cold day ride, and I ride super conservatively. No hi speed record for me. Lol here’s me in February on my 550. My buddy think I’m crazy riding one of the most unreliable ski by myself in the freezing cold water.
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  9. #9
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by jetskidude1113 View Post
    February on my 550 … riding one of the most unreliable ski by myself in the freezing cold water.
    Well, do you have self-recovery (self-rescue) plans/methods should the thing fail at the most inopportune moment, in the worst possible location, in the most catastrophic manner?

  10. #10

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    No I don't. I keep all my skis in tip top shape, 110% in all maintenance/build that I do and they are super reliable. It's a standup so I can't carry anything but myself. For cold weather rides.. I wear 5mm from head to toe, plus tour coat, helmet, gloves, and boots, I don't push my ski to the limited maybe 75% throttle at most so I'm 99% sure they won't failed on me, I keep to the side of the river maybe 50' out the most incase that 1% chance that it does failed on me so I can swim back. never want to make the evening news. lol

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