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  1. #1
    TimAtkinson's Avatar
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    Hurricane 1200 Exhaust Pipe Question/Opinon

    The pipe slip 5 inches inside the genesis log, what do you guys think, about this couple with a TDR 2 3/4 inlet and 2 3/4 outlet water box.
    Anthing I should do that would help this cobination. I can not use the stock stinger exhuast do to space restrictions of the hurricane.

    Thanks for you input.

    Tim

    The pipe is 3" ID

    It is going on a 1200 Carbed in a 97 Hurricane.
    I will post more pictures when I get it all together.
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  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    How close is the water injection point on the log pipe to the engine exhaust ports?

    I am wondering if water will be able to get to the ports, even with the engine running at idle, during extreme hull maneuvers (roll overs, nose up attitude, etc). Or after engine kill during the same situations.

    What does the engine look like inside the Hurricane hull? Must be a tight fit.
    Last edited by K447; 03-12-2010 at 01:01 AM.

  3. #3
    TimAtkinson's Avatar
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    The boat is made for it. It looks great, I have been dreaming about this for over a year. The only water injection port is a 1/4 Line that rus from the front the the top, the one the hose going to it. The water from the cylinder heads flow from through the manifold out the 3/4 hose in the bottom out to somewhere else. I am not 100% sure how it is setup so someone with some Genesis exhuast experience can chime in at anytime.

    I was thinking of taking the 3/4 outlet at the log at pluming it to the through hull fitting and leave in the water box dry, but I haven't really put alot of thought into it yet. I will post some pictures when I get the engine in with the manifold on.

    Tim

  4. #4
    Click avatar for tech links/info, donation request K447's Avatar
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    I was referring to the exhaust water injection port, which sprays water into the exhaust manifold interior, where it cools the exhaust flow before it reaches the rubber couplers and water box.

    Without the water injection, the exhaust temps out of the manifold will be much higher, and you cannot use regular rubber coupling hoses.

    Attached diagram shows water injection port (item 4). It is fed water from the screened fitting (item 3).

    The log pipe exhaust change a bit over the years. 1999-2000 Genesis, SLTX-B log pipe part number 1260850
    Replaced with 1261125 (2001), 1261125-329 (2002), 1261259-329 (2003-2004)

    I just noticed that the 1999 Genesis had dual hull exhausts - I did not know that!
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  5. #5
    TimAtkinson's Avatar
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    That must be number 4 on the diagram. That is a 1/4 line, you would think it would be fed by a larger id hose. I see your point it might just be a problem. I slid the pipe inside the log about 4 inches, I was trying to copy the stinger so the exhuast would have some back pressure, But I am now concerned that the water will just pool under the pipe and not make it into the exhuast stream. I will need to inject some water into it tomorrow and see if it sprays or how exactly it injects.

    BTW I looked at the service manual also, I had the cooling system backwards, I relized it is feed from the manifold to the engine. I will look into the exhuast water injection tomorrow and let you know what I find.

    Worst case I can slide the pipe back out towards the back of the boat this will solve this problem.



    Thanks for the input.

    Tim

  6. #6
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by TimAtkinson View Post
    That must be number 4 on the diagram. That is a 1/4 line, you would think it would be fed by a larger id hose.

    ...I had the cooling system backwards, I realized it is feed from the manifold to the engine...
    Item 2 in that diagram is the log pipe itself. 1/4" line feeds from 3 to 4.

    Item 5 is the main water line connection for the exhaust manifold water jacket. From there I think it feeds into the engine water jacket.

    BTW, be sure to take the fitting at 3 off, and ensure the screen filter inside is clean and clear.

    BTW, there are more Polaris manuals online now. Have a look here.

    In the 2000 Polaris service manual, page 2.15 (aka page 32) shows different orifice restrictor sizes for the Genesis 0.090" vs the Pro 1200, SLX, and Virage TX 0.070". Apparently the Genesis engine needed more water injection flow into the exhaust.

    Cooling system water flow diagram is on page 4.45 (156). The Genesis with the log pipe is different from the other 1200 models.
    Last edited by K447; 04-21-2010 at 05:00 PM.

  7. #7
    Rasta Mon Condoms We Be Jammin!!!!! TxVirageTx's Avatar
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    pipe

    am i to assume that a stock 1200 red pipe won't fit?

  8. #8
    TimAtkinson's Avatar
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    No not a chance.

  9. #9
    Rasta Mon Condoms We Be Jammin!!!!! TxVirageTx's Avatar
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    pipe

    not to step on anybodys toes or project,but crazy's got a hot seat pipe that appears could be mounted in the foward position.might be a good fit,interested in a set of 1200 carbs,adapters,and tau ceti f/a's?

  10. #10
    TimAtkinson's Avatar
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    I have to go with the log style, because the fuel tank is in the front. Snap me a picture of the F/A's I might be intrested.

    Tim

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