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Author Topic:   Proper spark plug selection
jxs226 posted 06-27-2001 04:39 PM ET (US)   Profile for jxs226   Send Email to jxs226  
Folks -

I am unsure which NGK spark plug model would be best for my 1978 85hp Johnson. The owner's manual lists a now obsolete Champion plug model, and from what I gather, NGK makes superior plugs. Pointing me to the proper plug would make me smile.


Bigshot posted 06-27-2001 04:51 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Do a search for NGK and you will see their website. B7HS gapped @ .030.
andygere posted 06-28-2001 03:24 PM ET (US)     Profile for andygere  Send Email to andygere     
I use NGKs in my 85 hp Johnson and have had very good luck. Champions, in my opinion, are junk.
blackdog posted 07-03-2001 11:38 AM ET (US)     Profile for blackdog  Send Email to blackdog     
Anyone with a Ficht switch over To NGK’s ?
2001 115 came with Champion XC12PEPB. Dealer recommend sticking with Champion during the warranty period.


jxs226 posted 07-05-2001 05:05 PM ET (US)     Profile for jxs226  Send Email to jxs226     
Thanks for the help, fellas. I went ahead and ordered some of these plugs, along with the supposedly superior Platinum plugs that also are supposed to be compatible with my old engine.


whalernut posted 07-06-2001 10:25 PM ET (US)     Profile for whalernut  Send Email to whalernut     
I have a 1975 85h.p. Johnson and I have tried Champion, NGK, Autolite, and Denso. My engine seams to prefer the Densos gapped at the reccomended .040 gap Top end and Trolling! Regards-Jack Graner.
blackdog posted 07-09-2001 12:38 PM ET (US)     Profile for blackdog  Send Email to blackdog     
I have been advised to stick with the Champion plugs for the Ficht Engine as this plug was made for OMC to combat fouling.
I have Indexing instructions if anyone wants them I can e-mail them.


triblet posted 07-09-2001 09:30 PM ET (US)     Profile for triblet  Send Email to triblet     
BTW, indexing is setting up the plugs so
that the opening on the electrode points in
a particular direction. It can be done by
using shim washers under the plug, or by
playing mix and match games with plugs.

Racers do it to optimize power. I presume
they make dyno runs to figure out what the
"right" way to point is.

The racers also occasionally do it so the
plug will clear the top of the piston.

Sounds like the FICHT needs it to live.


blackdog posted 07-10-2001 09:37 AM ET (US)     Profile for blackdog  Send Email to blackdog     
I think it does need indexing to live also.
From what I can gather Ficht engines benefit from indexing by reducing plug fouling. In their case the plugs are indexed with the open side of the spark plug gap facing the injector. It supposed to promote a better burn, less plug fouling and increase power. On 115 HP the increase in power is negligible from what I have been able to read. The main reason would be plug fouling in this case.


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