Found these browsing around...

http://www.e3sparkplugs.com/diamondfire.php

Seems they have a frontward discharge. They even state that they designed them similar to the rotary engine plugs.

Anyone have an experience or hope for these?

 

I see E3 plugs in many lawn mowers (i'm a small engine mechanic) and from what i've seen, they make the engine run even worse, i despise e3 plugs, and if you google them, theres a ton of people that complain about them also.

IMO, mazds spent millions of dollars testing which spark plugs performed the best in the engine, why not continue using their reference? Just my $.02

 

Well, I have heard lots of bad things about E3's but this is a new design. I know they're popular for gimmicky style sparkplugs, what kind exactly did you use in the small engines?

And I do love the OEM plugs, but I'm looking for a colder spark plug, and one that doesn't cost an arm and a leg like some of the racing plugs available for the rotary's.

These plugs interest me mostly because its the first surface discharge plug I've seen released for piston engines. With the first two designs being developed strictly for rotary's.

But I will say, I don't particularly like the design whatsoever. I think it has a lot of flaws, but I'd still like to test a set at least.

 

I don't know the #'s for the plugs, but the ones i see for small engines have a U shaped electrode, and they cost $10 a pop,when an OEM champion plugs costs $4. I agree they are a gimmick, and i really wonder how they are still in business, i never recommend them in the small engine world. I've had many push mowers come in, and the service tag says it won't start. So as usuall,make sure it has spark, it does, put the OEM champion in it, first pull and it fires up, and i'd ha e to say thay 70% of the time thag happenes, the e3 plug is brand new

 

Lol, that's bad. I'm losing hope for any of their designs now.
They try to state on their website that their plugs are better than iridium's, and iridium's are made skinny to save money.
I don't believe either one of those statements.