I was surprised when I measured the new plug core impedance with a multi-meter, it was much higher than the old plug, measuring about 35 k-ohms. The supplier assured me that this would drop to the normal impedance on reaching operating temperature. I set the plug gap and used it in a Mountfield mower and it worked fine and has done for some days now. I have to admit I didn't know until recently that plugs have different electrode impedances; indeed ANY impedance. There's a lot more to spark plugs that I thought.
Verified purchase: Yes | Condition: New
For years I have used champion spark plugs have tried nearly all the rest and they have been left not very reliable so I will carry on using champion plugs when needed .Top brand .
Verified purchase: Yes | Condition: New
The spark plugs are exactly right for the job and are very keenly priced in comparison to other parts.
Verified purchase: Yes | Condition: New
A long established brand of sparkplug and it does the job.
Verified purchase: Yes | Condition: New
Very good price for a classic spark plug.. as always, make sure you check the gap for your vehicle
Verified purchase: Yes | Condition: New
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