SBT Jetski Engines, Parts & Accessories

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  1. #1
    Joined
    Aug 2005
    From
    CT USA
    Posts
    37

    Question Running an engine WITHOUT water? How long?

    I was just wondering how long anyone would say an engine can run without water???? 20 seconds? 1 minute? Don't do it at all?

    I never do this, but am just curious since many say you can run for under 30 seconds or so when making changes or something. I personally never run for more than a few seconds without water to get all of the water out of the machine after I turn the hose off.

    Just curious, do the engines get hot and blow up right away? or could an engine run for a little while before getting too hot?

    No flaming! I am just curious:)

  2. #2
    Joined
    May 2005
    From
    Los Angeles(Hollywood)
    Posts
    425

    Default Re: Running an engine WITHOUT water? How long?

    honestly i'm learning. but i woud def say that once it reaches normal temp is when u stop runnign it immediatel. just like an automobile. theres a certain valve taht opens up for teh radiater cooling once the engine reaches running tempetures w/o cooling so that the engine can get to normal riding performance.

  3. #3
    Joined
    Jun 2005
    From
    Lake Charles, LA
    Posts
    74

    Default Re: Running an engine WITHOUT water? How long?

    on average 15 secs.

  4. #4
    Joined
    Nov 2003
    From
    Glendora, CA
    Posts
    6,846

    Default Re: Running an engine WITHOUT water? How long?

    You can start and run a watercraft motor for up to 30 seconds without hurting it.

    Radio,
    You are talking about a thermostat, but a thermostat has a hole that allows water through it to keep the water circulating through an engine until it reaches the theromstat's opening tempature which aids in the engines ability to reach operating tempature faster and sustain the minimum operating tempature of the engine.
    Bill O'Neal <br>
    WCM
    <a href="http://www.watercraftmagic.com"

  5. #5
    Joined
    May 2005
    From
    Los Angeles(Hollywood)
    Posts
    425

    Default Re: Running an engine WITHOUT water? How long?

    thats what i thought as well. but i guess teh concept is the same? maybe? hehe.

  6. #6
    Joined
    Mar 2003
    From
    SBT
    Posts
    21,545

    Default Re: Running an engine WITHOUT water? How long?

    Quote Originally Posted by Bill O'Neal2
    You can start and run a watercraft motor for up to 30 seconds without hurting it.
    Except Yamaha 4-strokes - 5 seconds max.
    SBT Tech Support is here to help with your problems.
    We try to answer each question quickly and accurately.
    Please do not use Private Messaging for Tech Support, use the forums.

  7. #7
    Joined
    Nov 2003
    From
    Glendora, CA
    Posts
    6,846

    Default Re: Running an engine WITHOUT water? How long?

    Yes. I should have qualified that as to two stroke motors only.
    Bill O'Neal <br>
    WCM
    <a href="http://www.watercraftmagic.com"

  8. #8
    Joined
    Jul 2004
    From
    Chicago
    Posts
    14

    Default Re: Running an engine WITHOUT water? How long?

    On 4 strokes, what happens after 5 seconds? Even if you have a cooling system like in a SD 4-tec?

  9. #9
    Joined
    Mar 2003
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    SBT
    Posts
    21,545

    Default Re: Running an engine WITHOUT water? How long?

    The Yamahas can overheat in a hurry. They have very intricate internal cooling systems. The Sea-Doo's can go a little longer, but still need external cooling and circulation pretty soon after starting. No ski is designed to run without active cooling.
    SBT Tech Support is here to help with your problems.
    We try to answer each question quickly and accurately.
    Please do not use Private Messaging for Tech Support, use the forums.

  10. #10
    Joined
    Sep 2004
    From
    florida
    Posts
    118

    Default Re: Running an engine WITHOUT water? How long?

    The 4-tec cooling system runs through the ride plate allowing the water to draw the heat from the coolant,so if it's not in the water once the coolant heats up you will overheat aswell .

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