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Jan 23rd, 2013
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Spark Plugs on a Merc #13390712 01/02/20 06:59 PM
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Champion1 Offline OP
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I have 2015 200hp ProXS that has never had the plugs changed. Is this something I can do myself or does the computer need to be reset?


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�It�s all in your head. It doesn�t matter if your 6 or 60. You can participate in this sport."-Rick Clunn
Re: Spark Plugs on a Merc [Re: Champion1] #13390716 01/02/20 07:04 PM
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dk2429 Online Content
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Do it yourself! Easy job... Just make sure you get the exact NGK plugs that you pull out (don't remember the exact part number.)


Majek 22 Extreme/225 Optimax Pro XS
2006 Chevy 2500HD Silverado/6.6 Duramax LBZ


Re: Spark Plugs on a Merc [Re: Champion1] #13390753 01/02/20 07:46 PM
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T Bird Online Content
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Yep easy task. Get some dialectical grease to put inside spark plug boot.


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Re: Spark Plugs on a Merc [Re: Champion1] #13390826 01/02/20 08:55 PM
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gary purdy Offline
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I would pull one of the easy to get to plugs and look at it first. Wait till you see where that #5 and #6 are at.


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Re: Spark Plugs on a Merc [Re: gary purdy] #13390838 01/02/20 09:14 PM
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T Bird Online Content
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Originally Posted by gary purdy
I would pull one of the easy to get to plugs and look at it first. Wait till you see where that #5 and #6 are at.


Probably should split the cowl for easier access. Only takes a couple of minutes.


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Re: Spark Plugs on a Merc [Re: T Bird] #13391341 01/03/20 11:02 AM
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Stump jumper Offline
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Originally Posted by T Bird
Originally Posted by gary purdy
I would pull one of the easy to get to plugs and look at it first. Wait till you see where that #5 and #6 are at.


Probably should split the cowl for easier access. Only takes a couple of minutes.


+1, a ratcheting box end wrench will help


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Re: Spark Plugs on a Merc [Re: Champion1] #13391439 01/03/20 01:47 PM
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grout-scout Offline
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Read a thread on BBC this morning that Don Weed posted, apparently many of the iridium plugs on amazon that are really cheap, are fake plugs from China. Buy from a reputable source.

Re: Spark Plugs on a Merc [Re: Champion1] #13391553 01/03/20 03:06 PM
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Champion1 Offline OP
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What gap should they be set to?


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Re: Spark Plugs on a Merc [Re: Champion1] #13391597 01/03/20 03:33 PM
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T Bird Online Content
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Originally Posted by Champion1
What gap should they be set to?


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Re: Spark Plugs on a Merc [Re: Champion1] #13391737 01/03/20 05:30 PM
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boatman025 Offline
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Pull lower cowls to make it easier


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Re: Spark Plugs on a Merc [Re: Champion1] #13393504 01/05/20 04:59 PM
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Gamblinman Online Content
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Be careful when re-gapping plugs with precious metals (iridium, platinum). The ground electrode must be bent using the proper tool.Use a wire feeler gauge carefully when measuring the gap between the ground and center electrodes.

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