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  1. #1
    MPower's Avatar
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    Opinions on cold water break in?

    Hoping to break in Oldman's FZR this weekend as we have some 70 degree weather coming our way, but Bob mentioned a concern he had. Is there any evidence or reasoning to support that breaking in an open loop 4-stroke in 45 degree water can hinder seating of the rings and hamper performance in the long run. I think on a stock factory motor everything should be okay as long as you allow a proper warmup.

    What are the opinions from those with experience?


  2. #2
    cheatin' piston popper addicted's Avatar
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    run it. the fzr has a thermostat

  3. #3
    MPower's Avatar
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    Quote Originally Posted by addicted View Post
    run it. the fzr has a thermostat
    Thanks!

  4. #4
    SHO_time's Avatar
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    Quote Originally Posted by addicted View Post
    run it. the fzr has a thermostat

    +1

    Just Let it idle a bit longer to warm up!

  5. #5
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by addicted View Post
    run it. the fzr has a thermostat
    Good info! i didn't know this. Going to have a hard look into this. Something like this could be beneficial to those of us running open loop kits on the RXP

  6. #6
    Moderator RX951's Avatar
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    Wink Part Number 14


  7. #7

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    Open loop with a thermostat. Doesn't that scream problems. Seems like the perfect place for salt, sand, debris to build up and prevent it from opening. Am I missing something or just over thinking this?

  8. #8
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by RX951 View Post

    Nice! Thanks for the pic Billy

  9. #9
    Moderator OsideBill's Avatar
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    My old 84 inline 4 mercruiser had open loop cooling and a t-stat, this is nothing new. dumps the water through the pipe, then when it needs more cooling opens the t-stat and dumps the hot water and replenishes with cool simple system.

  10. #10
    cheatin' piston popper addicted's Avatar
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    my 94 polaris had a thermostat too nothing new in marine applications. And with emissions, fuel injection and forced induction, having a handle on engine temp is even more critical.

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