ameyam

Hi,
I have been using a CM6 plug with my Dle20. Planning to buy spare plugs, I found these other plugs online. They are listed as NGK CM7. Just wanted to know what those ar
Also, the plugs now come w ith a A and H suffix. what does that denote?
Ameyam

DAKOTANOVASS

My Feedback: (17)

Here is a quick run down of what they mean. C=10mm, M=compact type, 6 is the heat range. A number 7 plug is a colder plug, "A" denotes special design tip and "H" means special thread. This info is found on the NGK website. I dont think I would try a different plug, stick with the cm6.

Terrell

pe reivers

H means 12.7mm reach instead of the 9.5mm reach of the CM6

BarracudaHockey

My Feedback: (11)

If it aint broke....

ameyam

No, question out of just curiosity...

Also wanted to know whether ICM6 plugs are better. Last I visited this forum last year, the jury was still out on that

Ameyam

BarracudaHockey

My Feedback: (11)

I've got iridium plugs on all my single cylinder engines and they seem to last a long time (my only twin came with cm6 and hans't needed plugs yet). Other than that I see no operational difference.