Correct spark plug?

[elgin2]

I have a `97 25hp Johnson with a RJC8 and a JC8 spark plug. Which is the correct plug or are either the correct plug?

[Buccaneer]

Did you Look on Marine Engine? Maybe you can figure it out from there.

http://www.marineengine.com/parts/johnson-evinrude-parts.php?year=1997&hp=25&model=BE25AREUR

Prepare to be boarded!

[Mumbles]

Two cylinder or three cylinder?

Two cylinder call for Champion QL77JC4, QL82C, or L78V. NGK equivalents would be BZ7HS-10, BR7HS, or BUHW-2.

Three cylinder motors use QL86C or BR6HS plugs.

NGK plug numbers with a -10 suffix means the plug has been gapped at the factory to 1mm, or .040″.

[outbdnut2]

I recommend the NGK BZ7HS-10. I’ve found Champion’s quality to be questionable in recent years.
Dave

[elgin2]

I wish it was 3 cylinders. They’re about as rare as hens teeth. It’s a twin.

Mumbles wrote:

Two cylinder or three cylinder?

Two cylinder call for Champion QL77JC4, QL82C, or L78V. NGK equivalents would be BZ7HS-10, BR7HS, or BUHW-2.

Three cylinder motors use QL86C or BR6HS plugs.

NGK plug numbers with a -10 suffix means the plug has been gapped at the factory to 1mm, or .040″.

[Author]

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