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magiccarpet 10-21-2019 11:46 AM

NGK vs. Rotax spark plugs
Would love to get your experience and opinions regarding the differences between the standard NGK DCPR8E and the Rotax (Bosch?) spark plugs P/N 297656.
Are there any benefits or disadvantages among them or do they perform equally in terms of combustion, CHT, reliability or anything?
Thanks a lot for sharing your thoughts on that.

Tony_T 10-21-2019 12:28 PM

No experience with the Bosch plugs here, but at 6 times the cost of the NGK, I doubt I will ever try them.

Piper J3 10-21-2019 02:42 PM

NGK work fine... Replaced first set ~200TT and now 500TT still running second set.

DaleB 10-21-2019 03:06 PM


Originally Posted by Tony_T (Post 1381132)
No experience with the Bosch plugs here, but at 6 times the cost of the NGK, I doubt I will ever try them.

Exactly. I'll probably never know how the new Bosch plugs work because they're priced ridiculously high.

RFSchaller 10-21-2019 08:29 PM

I replace all mine with new every annual. The originals are cheap enough I donít even think twice about it. If the price goes up I might reconsider that practice.

NinerBikes 10-22-2019 09:18 AM

My friend replaced his NGK's at 140 hours on the motor, at the 2nd annual. I think it was about 24 to $28 to buy all 8 plugs?

The used plugs looked practically new, there was no visible wear or rounding of the electrode edge surfaces, and the gap was still 0.026".

Bob has reached the conclusion that 200 to 280 hours on a set of NGK plugs would probably be no problem at all, although the price of the NGK's is so reasonable, just replace them if you're in there. No sense in being penny wise and pounds foolish, think about what your time is worth once all the cowling is already off.

DaleB 10-22-2019 09:21 AM

Yeah... I kind of wish I had a use for those plugs in some other engine! We change them every annual, and the old plugs are still in find shape and would be still be usable in something else. At less than $3 each, though, we just change 'em.

RFSchaller 10-22-2019 08:11 PM

I carry two of my used plugs in my on-the-road bag of spare parts just in case. Thatís how I make use of the old ones.

Catbird 10-26-2019 05:48 PM

I believe Magic Carpetís original question was related to comparison between the Rotax plugs and the NGK plugs. We all like the NGKs for the aforementioned reasons. But, does anyone have any experience with the Rotax plugs?

magiccarpet 10-27-2019 12:28 PM

Thanks a lot everyone for your comments. Based on them I conclude that there isn't any added value to go with the Bosch ones except to spend more $$.😉

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