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  1. #1
    PWCToday Newbie jeffpat's Avatar
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    How to tow a 06 VX in water?

    I was talking to a guy yesterday and the topic of towing a waverunner in water came up and he said you should never do it unless you clamp off some line to prevent the water from backing up into the engine. Is this true? I've never heard of that, but I've never had to do it either. Which line is it on an 06 VX?

    Thanks!
    Jeff

  2. #2
    Frequent Poster Lee Taylor's Avatar
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    Coolant Path - FX140, 2002, Yamaha

    The coolant path on many Yamaha engines goes past the exhaust valves. As long as exhaust is coming out of the cylinders, coolant (water) cannot enter the cylinder. I think this is what he is referring to. I think what he is saying is that if the engine is not running, it is possible to force water (pasted the open exhaust valves) and into the cylinders, by towing. Here is a photo of the coolant intake on my FX140 IMG_4581. by divepassion, on Flickr
    Last edited by Lee Taylor; 08-20-2017 at 10:59 AM.

    Owner. Rider. Maintenance. 15yrs.
    2002 Yamaha. FX140. 1000cc. Cruiser. Collectors model.
    2017 Lowes Stryker 16. Mercury 50hp 4-stroke.
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  3. #3
    PWCToday.com Is My Home Away From Home hyosung's Avatar
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    Re: How to tow a 06 VX in water?

    it is a good idea to clamp the water feed line on any jet ski before towing , it is possible for the cooling system to create a siphon and fill the motor with water ,it would be very rare on a four stroke but it could happen so why chance it , you can get a fuel line clamp from a tool shop to do the job for about 10 bucks .
    2 x 650 sx custom build (my toys) http://www.pwctoday.com/showthread.php?t=425767

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    Originally Posted by hyosung
    so when you say i """ hammer and slap things together """ this may be so , BUT they are hammered and slapped together SOLID

  4. #4
    Frequent Poster Lee Taylor's Avatar
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    Hose - FX140, Coolant Inlet

    On my machine it is Item 60 on the schematic / http://www.yamahapartshouse.com/oemp...318d/exhaust-2
    Last edited by Lee Taylor; 08-20-2017 at 11:18 AM.

    Owner. Rider. Maintenance. 15yrs.
    2002 Yamaha. FX140. 1000cc. Cruiser. Collectors model.
    2017 Lowes Stryker 16. Mercury 50hp 4-stroke.
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  5. #5
    PWCToday Newbie jeffpat's Avatar
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    Re: How to tow a 06 VX in water?

    Thank you Lee and hyosung! That does make sense. Can you show me what hose I'm supposed to clamp?

  6. #6
    Frequent Poster Lee Taylor's Avatar
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    Hose - FX140, 2002, Coolant Intake

    The 1" (approximate) black one in the bottom left hand corner of the photo. The one leading to the Thermostat housing. The Thermostat housing is the silver sub-assembly hanging on the engine beneath the engine hoisting lug 100_1829 by divepassion, on Flickr
    Last edited by Lee Taylor; 08-20-2017 at 11:15 AM.

    Owner. Rider. Maintenance. 15yrs.
    2002 Yamaha. FX140. 1000cc. Cruiser. Collectors model.
    2017 Lowes Stryker 16. Mercury 50hp 4-stroke.
    Video: https://www.youtube.com/playlist?lis...CHDiKr9UqpdsAV

  7. #7
    PWCToday Newbie jeffpat's Avatar
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    Re: Hose - FX140, 2002, Coolant Intake

    Awesome, thank you so much Lee!!!

  8. #8
    PWCToday.com Is My Home Away From Home Grumpy Old Guy's Avatar
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    Re: How to tow a 06 VX in water?

    That is the wrong hose !!!!

    That is a exit hose for the water leaving the thermostat. You need to follow your flush hose (red hose) down into the bottom of the hull where it connects to a plastic Y fitting & take a pair of needle nose vice grips & clamp off the black hose on either side of that Y fitting. (#2 in the parts diaghram posted above)

    Water does not flow around the exhaust valves & enter the motor there. A certain amount of water is injected into the exhaust pipe to keep the rubber hoses cool & they will overheat & split without that water. Without the exhaust pressure pushing the water out the rear it will back up & fill the motor.

    One of the major reason's you should NEVER flush a PWC motor without the motor running.
    Last edited by Grumpy Old Guy; 08-20-2017 at 02:57 PM.

  9. #9
    Frequent Poster Lee Taylor's Avatar
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    Re: How to tow a 06 VX in water?

    I use to think that was the exit hose but I now think I had it backwards. I now think the flush hose is a "back" flush hose. The hose coming off the Y joint is set-up like a venturi in the jet nozzle. From a design perspective a venturi would draw water out of the coolant system using the power of the water jet. In other words a vacuum would be created in that line due to the water jet action. So my conclusion is that line would be the discharge of the coolant system. It only makes sense.
    Last edited by Lee Taylor; 08-20-2017 at 07:55 PM.

    Owner. Rider. Maintenance. 15yrs.
    2002 Yamaha. FX140. 1000cc. Cruiser. Collectors model.
    2017 Lowes Stryker 16. Mercury 50hp 4-stroke.
    Video: https://www.youtube.com/playlist?lis...CHDiKr9UqpdsAV

  10. #10
    PWCToday.com Is My Home Away From Home Grumpy Old Guy's Avatar
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    Re: How to tow a 06 VX in water?

    Quote Originally Posted by Lee Taylor View Post
    I use to think that was the exit hose but I now think I had it backwards. I now think the flush hose is a "back" flush hose
    You should stop thinking KNOW before you post.

    Just to clarify....You are wrong.

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