Sparkplug question

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ryanjames170
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Location: Hayward WI

Sparkplug question

Postby ryanjames170 » Thu Aug 10, 2017 2:57 pm

This is know is something of some peoples opinions but what do you guys figure are the best sparkplugs ie brand for vintage outboards? IE will give the best performance and what not.. i know NGK is the prefered with modern outboards but is it with the vintage stuff as well?
Mercury/OMC guy..

3 Merc's
4 johnson's
1 Hiawatha/Gale

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Garry in Tampa
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Location: Florida

Re: Sparkplug question

Postby Garry in Tampa » Thu Aug 10, 2017 4:44 pm

Champion was the standard at one time. BUT since they were bought out by an overseas conglomerate. they have gone down hill. Sadly, the Japanese NGK has proven to be dependable and will probably be good until manufacturing is moved to China. . . :?
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B.Morrison
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Re: Sparkplug question

Postby B.Morrison » Thu Aug 10, 2017 5:56 pm

is there a NGK/Champion chart/

ryanjames170
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Joined: Tue Aug 01, 2017 12:19 am
Location: Hayward WI

Re: Sparkplug question

Postby ryanjames170 » Thu Aug 10, 2017 6:28 pm

I could probably make one as I got access to cross reference stuff at work but I would need to know some spark plug types one would need
Mercury/OMC guy..

3 Merc's
4 johnson's
1 Hiawatha/Gale

outbdnut2
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Re: Sparkplug question

Postby outbdnut2 » Thu Aug 10, 2017 7:57 pm

There are online sites below (and others out there too) that cross reference, but some are incomplete and the sites don't always agree with each other. The number in the middle of NGKs is the heat range and the higher the number, the colder the plug. If 2nd character is the letter R, it's a resistor plug. If 2nd letter is a Z, it's what NGK calls an "Inductive resistor" which is a small coil that blocks radio interference like resistor plugs do, but without soaking up as much energy as resistor plugs. If there is a dash number on the end, like -10, it is made to have a .010 larger gap than the same plug with no dash number.
Good Luck!
Dave

http://www.sparkplug-crossreference.com/

http://progreengrass.com/spark-plug-cross-reference-chart/

http://www.sparkplugcrossreference.co.uk/search/

This NGK site has a cross-reference function too:

https://www.ngk.com/Automotive-NGK-l1411.aspx

ryanjames170
Posts: 91
Joined: Tue Aug 01, 2017 12:19 am
Location: Hayward WI

Re: Sparkplug question

Postby ryanjames170 » Thu Aug 10, 2017 8:13 pm

I actually have from work a NGK book with cross reference tables in it. Got it with alot of other parts book. Boss said it was far better to just order Me books then to pay me to mess around looking up stuff in them at work.
Mercury/OMC guy..

3 Merc's
4 johnson's
1 Hiawatha/Gale

Jerry Ahrens
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Re: Sparkplug question

Postby Jerry Ahrens » Fri Aug 11, 2017 9:49 pm

Personally, I like Champions in my older motors, but I have used some NGK's with no problems. When you try to cross reference different brands in newer or current engines, that's when you can run into trouble. Some newer OMC outboards, for example, must have Champions or they will experience driveabilty issues.
Jerry Ahrens AOMCI Member MAPS Chapter President

ryanjames170
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Location: Hayward WI

Re: Sparkplug question

Postby ryanjames170 » Fri Aug 11, 2017 10:31 pm

Jerry Ahrens wrote:Personally, I like Champions in my older motors, but I have used some NGK's with no problems. When you try to cross reference different brands in newer or current engines, that's when you can run into trouble. Some newer OMC outboards, for example, must have Champions or they will experience driveabilty issues.


i might end up using champs in a few of my motors but i know the NGK's are good how ever where i run into issues and i know the plugs are difrent is both a J8J and J6J cross to the same darn NGK plug B6S.. though ive had good luck with Autolites in stuff though.. FRAM makes better plugs then filters.. there filters are sub standard for the price of em
Mercury/OMC guy..

3 Merc's
4 johnson's
1 Hiawatha/Gale

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Tubs
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Re: Sparkplug question

Postby Tubs » Sat Aug 12, 2017 10:04 am

I prefer AC's but they don't always cross over.
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Chris_P
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Re: Sparkplug question

Postby Chris_P » Sat Aug 12, 2017 10:09 am

Im like Tubs, if I can find the right ACs on the net, I buy em up.

I buy the Champion J6C in bulk, as I mainly deal in 50s OMCS, and run those plugs in almost all of my motors.

I think it is like the Chevy/Ford preference. Any brand will make a bad plug from time to time. Whomever bought that one bad plug, will forever detest them. There will be no changing their mind, so I don't try.

Ive had bad plugs in all of the brands!


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