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-   -   Chi Com Spark Plugs (http://forums.pelicanparts.com/off-topic-discussions/1175194-chi-com-spark-plugs.html)

varmint 03-14-2025 04:07 PM

Chi Com Spark Plugs
 
http://forums.pelicanparts.com/uploa...1741996959.jpg
http://forums.pelicanparts.com/uploa...1741996989.jpg
http://forums.pelicanparts.com/uploa...1741997031.jpg


Months later I’m finally getting to this project. First owner gave up and put it on Craigslist. Cheap Chinese two stroke engine. I want to put in a shorter plug. Two auto parts stores and the chainsaw place can’t ID this thing. Any ideas?

908/930 03-14-2025 04:19 PM

Why a shorter plug? NGK B6HS is similar but apparently has longer tip, could be a problem with piston clearance.

pwd72s 03-14-2025 04:20 PM

Maybe check with a chain saw shop?

varmint 03-14-2025 04:25 PM

Zero space. Had to pull the engine to get the damn plug out. This is a kids bike with a grown up size motor. First guy did a beautiful job on the paint, but ****ed up the drive sprocket and rear wheel. Then used the bigger hammer approach to making everything fit.

varmint 03-14-2025 04:26 PM

Quote:

Originally Posted by pwd72s (Post 12428875)
Maybe check with a chain saw shop?


Already been to the stihl place. And the internet is disturbingly vague.

fanaudical 03-14-2025 06:49 PM

Might have to go at this the hard way.

What thread is on the plug? Length of thread? Overall dimensions of the rest of the plug?

Chocaholic 03-14-2025 07:24 PM

Looks like the same plug type used in my 68 BMW R60/2 (short thread).

NGK B7HS. Worth a try.

http://forums.pelicanparts.com/uploa...1742009045.jpg

LWJ 03-14-2025 10:17 PM

No idea. But I am a serious fan of NGK. Only brand I buy.

wdfifteen 03-15-2025 02:30 AM

I understand the desire to get it running, but then what? It looks like the kind of piece you hang on the wall and look at.

cabmandone 03-15-2025 09:24 AM

From what I can find the L8C is the equivalent of a NGK B6HS or Champion L82C.

From a motorized bicycle forum "NGK-BR6HS is the most widely used replacement plug for the Chinese crappy Z4C and the Z8C S/Ps."

I'd swing by Lowes or Tractor supply with the one you have and compare it to what they offer in the small engine department.

varmint 03-15-2025 11:26 AM

Quote:

Originally Posted by wdfifteen (Post 12428972)
I understand the desire to get it running, but then what? It looks like the kind of piece you hang on the wall and look at.



Eventually we’ll have grandkids. They’ll come up for the summer. The plan is to send them home after a few months with a bunch of new swear words and some scars. This is the scars part of the plan.

I’m also pissed off that a bunch of things so simple, a bicycle and a crap two stroke motor, have combined to confuse me. I a m going to win this somehow.

varmint 03-15-2025 11:29 AM

Quote:

Originally Posted by cabmandone (Post 12429093)
From what I can find the L8C is the equivalent of a NGK B6HS or Champion L82C.

From a motorized bicycle forum "NGK-BR6HS is the most widely used replacement plug for the Chinese crappy Z4C and the Z8C S/Ps."

I'd swing by Lowes or Tractor supply with the one you have and compare it to what they offer in the small engine department.



Thanks. This gets me moving again.

red 928 03-15-2025 12:21 PM

You could always walk into an auto parts store where the old guy behind the counter would use his 40 years of experience and say "Oh I think I know exactly what you need, hold on for a minute while I go back and look around for it".

pwd72s 03-15-2025 12:59 PM

I do recall short spark plugs being used in 4 stroke lawnmowers with flat heads...maybe early Briggs Stratton stuff.

Arizona_928 03-15-2025 08:21 PM

Quote:

Originally Posted by red 928 (Post 12429158)
You could always walk into an auto parts store where the old guy behind the counter would use his 40 years of experience and say "Oh I think I know exactly what you need, hold on for a minute while I go back and look around for it".

Spec out the threads and narrow it down.

pmax 03-15-2025 10:27 PM

Quote:

Originally Posted by varmint (Post 12428865)

http://forums.pelicanparts.com/uploa...1742106443.jpg

Tobra 03-16-2025 02:56 PM

Put a front brake on it

varmint 03-30-2025 02:40 PM

http://forums.pelicanparts.com/uploa...1743374401.jpg

Best guess.

varmint 03-30-2025 03:35 PM

Quote:

Originally Posted by Tobra (Post 12429673)
Put a front brake on it



http://forums.pelicanparts.com/uploa...1743377729.jpg


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