Posted by MarkB_MI on August 19, 2019 at 21:14:13 from (174.230.5.250):
In Reply to: Re: Spark plug brand? posted by sotxbill on August 19, 2019 at 18:21:56:
> So yes, what most folks are saying her is correct about some brands being better. Again,, based on how much spark(voltage) and how much compression, you can see a huge difference.
That's a lot of interesting information. I'll note that you're the ONLY poster to actually give hard evidence for your plug preference. All the other posts seem to be of the "Ford vs Chevy" (or maybe "Chevy vs Toyota") ilk.
> Question to you.. how often is the compression over 115 lbs????
When first starting a small engine, I'd think not that often. Otherwise you'd have a hard time just pulling the cord. I am curious, though, what the failure mode is when the plug doesn't fire under pressure. Note that the electrode voltage will rise to whatever is required to jump the gap, UNLESS another current path is found. If there is no fouling and the plug wire is good, the only path left is the spark plug insulator.
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