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  1. #1
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    Question Hard to start Mercury xr6 150

    I have a 2001 Mercury xr6 150 carb motor and it can be a bear to start when you first try to start it when the engine is cold ( like first thing in the morning ) but once it starts and you run it for a minute or so it's fine for the rest of the day. Primer bulb is nice and tight and the spark plugs appear to be in good shape but it takes several attempts to get her to fire up. Does anyone have any tips or suggestions on how to get it to crank a little easier?

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  3. Member
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    #2
    -trim her all the way down
    -choke it or about 8-10 sec (prime)
    -give it little throttle while cranking it should fire up

  4. Member
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    #3
    Like Will said, but trim the motor to the level position. Turn key to on and choke it for about 10 seconds and then fire it up. If mine fires and then shuts down, I dont choke it again,
    but just fire it up with a little throttle. If I hit the choke the second time, it tries to flood out.
    Dewayne

  5. Mercury - 3 Liter Moderator EuropeanAM's Avatar
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    #4
    I'd recommend you try THIS proceedure, and see if it helps:

    -Trim at LEVEL TRIM position.
    -Pump primer bulb FIRM
    -Throttle at IDLE POSITION
    -Key ON, push in for 10 seconds (one thousand one, one thousand two... you get the drift)
    -Crank engine. If it sputters or starts to die out, bump the key "in" momentarily, until engine continues to run on it's own.

    This proceedure applies ONLY to COLD STARTS.


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  6. Member Kenny3Times's Avatar
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    #5
    Good info. I always thought you were supposed to give it a little throttle in neutral, glad I know better now

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    #6
    I have a 2004 XR6 150hp. Took it out today and it fired right up. Warmed it up and drove it down river for about 10 minutes and shut it off with motor level . When I went to start it again 15 minutes later it wouldn't start and seemed flooded. After a while it started back up.

    Anyway to avoid it flooding when shutting it down?

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    #7
    Quote Originally Posted by miahjohn View Post
    I have a 2004 XR6 150hp. Took it out today and it fired right up. Warmed it up and drove it down river for about 10 minutes and shut it off with motor level . When I went to start it again 15 minutes later it wouldn't start and seemed flooded. After a while it started back up.

    Anyway to avoid it flooding when shutting it down?
    Call it nature of the beast. Next time that happens check the primer bulb. Mine will do the same thing from time to time and the bulb went soft. Why I don't know.

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    #8
    Quote Originally Posted by ksubasser24 View Post
    Call it nature of the beast. Next time that happens check the primer bulb. Mine will do the same thing from time to time and the bulb went soft. Why I don't know.
    bulb was solid.

  10. Mercury - 3 Liter Moderator EuropeanAM's Avatar
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    #9
    Quote Originally Posted by miahjohn View Post
    I have a 2004 XR6 150hp. Took it out today and it fired right up. Warmed it up and drove it down river for about 10 minutes and shut it off with motor level . When I went to start it again 15 minutes later it wouldn't start and seemed flooded. After a while it started back up.

    Anyway to avoid it flooding when shutting it down?
    Make sure you're not "choking" the engine when it's warm. Depending on the fuel you're running (and temperature conditions), there "may" be times when it's necessary to crack the throttle open slightly on a warm start (just be sure to pull it back promptly after the engine starts to avoid over-rev).


    Dual Mercury Master Technician- for Mercury Outboards, Racing & Mercruiser Sterndrives in Greenville, SC.
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  11. Member
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    #10
    Don, Does it hurt anything to push the key in for a second or two. This is what I have been doing for years when it doesn't pop on the first bump of the key. Why is it better to crack the throttle vs. bumping the choke to push a little extra fuel to it?

  12. Mercury - 3 Liter Moderator EuropeanAM's Avatar
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    #11
    Choking (or more accurately, enrichening) is normally only necessary on a COOL or COLD engine. In most cases, an engine that's warm will start WITHOUT enrichment.

    Cracking the throttle should NOT be necessary on COLD or COOL starts. It may, however, be necessary for some WARM starts, especially if the engine has been (or is) at a trim angle OTHER than level (in bright sunlight and/or warm ambient temps).

    This applies SPECIFICALLY to carb model engines (such as the XR6).


    Dual Mercury Master Technician- for Mercury Outboards, Racing & Mercruiser Sterndrives in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 38 years (learn something new every day).
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