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  1. #1
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    Exhaust restrictor 300xs?

    Somebody knows the meaning of this exhaust tube insert from my Mercury 300xs (above cavication plate )? Heard this is just a restricor only for European engines due to emission rules. Can somebody confirm this with a USA 300xs?

    Kind regards,
    Corne

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    Boat: Hydrostream virage
    Engine: Mercury 300 XS DBR 1.3
    Props: 32' performance drag4 ,buckshot gen2 4 blade cleaver 34'
    Max speed: 113mph

  2. #2
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    Yes, that is exactly what it is. You probably need it to be legal in europe. Not needed or wanted in the U.S.

  3. Thanks darkdream thanked for this post
  4. #3
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    Quote Originally Posted by billybob View Post
    Yes, that is exactly what it is. You probably need it to be legal in europe. Not needed or wanted in the U.S.


    I am so glad to have found this! I found this in my 300xs after the mid section cracked. I replaced it with a 250xs midsection and it didn't have the tube. Thanks guys!

  5. #4
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    Notice any difference?

  6. #5
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    YOU MIGHT WANT TO BE CAREFUL FIRST TIME OUT. Mercury may have leaned that motor down, to reduce emissions. Then if you switch over to other exhaust system, it may breathe better, causing a lean situation. I would call a MERC. dealer in your country.

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