69' Evinrude Plug ?

tomh59 · Feb 3, 2008

Hi Gang.

I bought a 69 25 evee that has RJ12c plugs installed. They're in good
condition. Is it OK to keep'm in or should I change them out? I plan on on
doing a decarb with Seafoam soon. Will these plugs be OK just to do that and put what's supposed to be there in after? Oh ya the model# 25902.

As always,
Thanks

tashasdaddy · Feb 3, 2008

Re: 69' Evinrude Plug ?

i would do the decarb before much use, the champion chart say to use, RJ8C or J8C new numbers. the old plug was J4C all are gapped at .030.

tomh59 · Feb 3, 2008

Re: 69' Evinrude Plug ?

So take out the existing plugs before decarb?

Silvertip · Feb 3, 2008

Re: 69' Evinrude Plug ?

No -- leave them in. They will get crudded up during the decarb. Decarb the motor, run the be jeepers out of it and then replace the plugs.

tashasdaddy · Feb 3, 2008

Re: 69' Evinrude Plug ?

sorry i 'as s u med' that.

F_R · Feb 3, 2008

Re: 69' Evinrude Plug ?

Whoever writes the Champion plug charts should be strung up. A J8C is too hot. A RJ8c is a resistor plug..no good. Use J4C, or J6C if you can't find J4C.

tashasdaddy · Feb 3, 2008

Re: 69' Evinrude Plug ?

right off the champion site. "http://www.championsparkplugs.com/Default.asp" that's why i mentioned the J4C.

tomh59 · Feb 3, 2008

Re: 69' Evinrude Plug ?

OK fellas thank you all. I'm a novice and rely on the experts.

JB · Feb 3, 2008

Re: 69' Evinrude Plug ?

For a lot of high speed operation use J4C. For a lot of trolling and idling Use J6C.

Gap at .030"

tomh59 · Feb 3, 2008

Re: 69' Evinrude Plug ?

J6C it is. I'll be doing mostly low speed,heavy tide pull. Once and a while
I'm gonna have to get on it to fight the tidal rush. What a beauty I score.
Fresh water motors are rare up here along the Mass. coast. I love this thing.
Even sanded the cowl to paint it up. Looking to get some proper decals.
Any ideas?

HighTrim · Feb 4, 2008

Re: 69' Evinrude Plug ?

Try ebay, there are a few options there.

F_R · Feb 4, 2008

Re: 69' Evinrude Plug ?

tashasdaddy said:
right off the champion site. "http://www.championsparkplugs.com/Default.asp" that's why i mentioned the J4C.

Tash, just for the record, I wasn't taking a whack at you. I was just expressing my opinion about the Champion chart writers. I think you agree, it is supposed to be J4C

tashasdaddy · Feb 4, 2008

Re: 69' Evinrude Plug ?

F_R, i understood that. just wanted people to see the charts are not necessarily right.

i prefer this chart. "http://www.boatsetup.com/SparkPlugChart.pdf"

69' Evinrude Plug ?

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