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  1. #1
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    Primer Ball - 300xs

    Do you have to use a primer ball on the 300xs? I was told by a Merc tech it was not needed.

  2. #2
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    no primer ball

    They don;t want you to us one on the opti;s at all i have seen some motor;s not run with them. Dave

  3. #3
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    I use a 3-4 lb electric fuel pump on all my motors to keep them primed. No primer bulb needed. I have it wired to the ignition.
    Last edited by WILDMAN; 08-30-2008 at 09:51 PM.
    " IT'S NOT HOW FAST YOU ARE, IT'S HOW COOL YOU LOOK!!! "

    Check out my new website. liberatorpowerboats.com
    Boat Delivery available













    Things owned. NOTHING!!
    Ain't got no toyz, Ain't got no money! I is jus a poor Florida boy!

    Visit My Liberator Boats Website

  4. #4
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    What Wildman said.
    Checkmate 2002 Convincor 270 496 MAG-HO

    2003 Cougar 22MTR w/300xs SOLD
    90 21Skater w/300xs - sold
    98 STV Euroski w/280 - sold


    2006 Trailblazer SS 6.0l 395hp

  5. #5
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    Thanks, who's pump should i use?

  6. #6
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    Go to your local auto parts store. You can get the 2-4 lb, or 4-7 lb. If you run saltwater, use the plastic type. If you can't find one, I can sell you one for $55.
    " IT'S NOT HOW FAST YOU ARE, IT'S HOW COOL YOU LOOK!!! "

    Check out my new website. liberatorpowerboats.com
    Boat Delivery available













    Things owned. NOTHING!!
    Ain't got no toyz, Ain't got no money! I is jus a poor Florida boy!

    Visit My Liberator Boats Website

  7. #7
    Join Date
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    There is nothing wrong with using a Merc Primer Bulb with any Optimax. Primer bulbs are NOT to be used with Verados.

  8. #8
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    Quote Originally Posted by sosmerc View Post
    There is nothing wrong with using a Merc Primer Bulb with any Optimax. Primer bulbs are NOT to be used with Verados.

    I'll try it with a primer bulb.

  9. #9
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    Yeah, primer bulbs work fine, but are just ugly and a pain to have to pump up all the time.
    " IT'S NOT HOW FAST YOU ARE, IT'S HOW COOL YOU LOOK!!! "

    Check out my new website. liberatorpowerboats.com
    Boat Delivery available













    Things owned. NOTHING!!
    Ain't got no toyz, Ain't got no money! I is jus a poor Florida boy!

    Visit My Liberator Boats Website

  10. #10
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    Why would you have to pump it all the time? If the fuel system is working properly on an Opti, you should only have to prime it if you run it out of fuel. On my rig, (I know, it is a Rude and not a Merc) it has a primer ball....but in the 2.5years and almost 200hrs I have put on it, I have never, not even once, touched the primer bulb. I back the boat in, turn the key, let the system check lights check and go out, then start the motor. Starts on the first revolution every time. Do the same thing on the rigs with the Opti motors. Anything with a DI motor I have never touched the primer bulb and never had an issue....

  11. #11
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    How do you wire it up to the ignition? I have a holley red for my 175 merc black max and i'm not sure how to wire it, any diagrams or suggestion?
    1973 Hydrostream Vector (under restoration)

  12. #12
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    I HAVENT HAD ONE SINCE DAY ONE.. THE VERY FIRST TIME I PRIMMED IT AND HAVE NEVER NEEDED ONE.. JUST MAKE SURE YOU DO NOT RUN OUT OF FUEL..

  13. #13
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    I have one

    Get one with big fittings. When mine sits for weeks sometimes the bulb is soft.

  14. #14
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    The only time I prime my Opti (primer ball) is after changing the hull mounted Racor or the engine mounted filter.

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