I have a 2000 Mercury EFI 225 the marina told me to buy champion spark plugs l77jc4 they said cross

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I have a 2000 Mercury EFI 225 the marina told me to buy champion spark plugs l77jc4 they said cross by rose.matt29 on 17 Sep, 2017 15:06
I have a 2000 225 EFI Mercury misses real bad I'm changing out spark plugs the marina told me the plug was a champion l77jc4 the young boy didn't know what the Gap rate was either I did not want to put the spark plugs in without checking with somebody

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Reply #1 by Nightmare on 17 Sep, 2017 21:26
QL77CC Champion gapped at .035 is what I'm finding. The L77JC4 looks like its the plug for a lot of J-Rudes at .030.

NGK BR8HS gapped at .032 is also specified.

Not saying the guy at the marina is wrong but find it odd he can tell you what plug but not the gap...

I'm not a Merc guy but the L77 sounded odd to me.

Good luck - I'd do some more checkin' as the wrong plug can really create a problem.

This is a question that Bullet will smack down in nuttin' flat...
Reply #2 by Curt on 18 Sep, 2017 21:18
@bullet20dc Can you help with this one?

I also find it odd that the guy at the marina wasn't more help. I would contact a Merc dealer and ask them.

I've read conflicting info as to whether your outboard uses gapless plugs or not. So be sure to check thoroughly before buying any and installing them. In some cases, the wrong plug can do serious motor damage.
Reply #3 by frugalangler on 19 Sep, 2017 11:16
What's in it today?
Reply #4 by Curt on 19 Sep, 2017 11:31
Quote from: frugalangler on 19 Sep, 2017 11:16
What's in it today?

That was my thought also.

@rose.matt29
Reply #5 by Jig Man on 20 Sep, 2017 16:11
You might fill out the form at this site and get some help.

https://www.mercurymarine.com/en/us/contact/outboard-customer-assistance