Posted By: Champion1
Spark Plugs on a Merc - 01/02/20 06:59 PM
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?
Spark Plugs on a Merc
Posted By: dk2429
Re: Spark Plugs on a Merc - 01/02/20 07:04 PM
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.)
Posted By: T Bird
Re: Spark Plugs on a Merc - 01/02/20 07:46 PM
Yep easy task. Get some dialectical grease to put inside spark plug boot.
Posted By: gary purdy
Re: Spark Plugs on a Merc - 01/02/20 08:55 PM
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.
Posted By: T Bird
Re: Spark Plugs on a Merc - 01/02/20 09:14 PM
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.
Posted By: Stump jumper
Re: Spark Plugs on a Merc - 01/03/20 11:02 AM
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
Posted By: grout-scout
Re: Spark Plugs on a Merc - 01/03/20 01:47 PM
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.
Posted By: Champion1
Re: Spark Plugs on a Merc - 01/03/20 03:06 PM
What gap should they be set to?
Posted By: T Bird
Re: Spark Plugs on a Merc - 01/03/20 03:33 PM
Originally Posted by Champion1
What gap should they be set to?
![[Linked Image]](https://texasfishingforum.com/forums/pics/userpics/2020/01/full-47849-35096-screenshot_14.png)
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Posted By: boatman025
Re: Spark Plugs on a Merc - 01/03/20 05:30 PM
Pull lower cowls to make it easier
Posted By: Gamblinman
Re: Spark Plugs on a Merc - 01/05/20 04:59 PM
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.