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NGK vs. Rotax spark plugs

magiccarpet

magiccarpet

Well Known Member
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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.
 
No experience with the Bosch plugs here, but at 6 times the cost of the NGK, I doubt I will ever try them.
 
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Tony_T said:
No experience with the Bosch plugs here, but at 6 times the cost of the NGK, I doubt I will ever try them.
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Exactly. I'll probably never know how the new Bosch plugs work because they're priced ridiculously high.
 
I replace all mine with new every annual. The originals are cheap enough I don?t even think twice about it. If the price goes up I might reconsider that practice.
 
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.
 
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.
 
I carry two of my used plugs in my on-the-road bag of spare parts just in case. That?s how I make use of the old ones.
 
I believe Magic Carpet?s 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?
 
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 $$.😉
 
magiccarpet said:
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.
Click to expand...
There are major different in the physical design so you would think that they perform with better reliability and stuff?
 
Our new 914 engine came with the Rotax double electrode plugs. We have been chasing some fuel flow and EGT problems for over 100 hours. One suggestion from Brett at Advanced Powerplant Solutions (formerly LEAF) was to try NGK plugs. There was no performance difference, just cash savings! We will continue with NGK plugs as we did for 1200 hours on the old engine.

Jim Butcher
 
h&jeuropa said:
Our new 914 engine came with the Rotax double electrode plugs. We have been chasing some fuel flow and EGT problems for over 100 hours. One suggestion from Brett at Advanced Powerplant Solutions (formerly LEAF) was to try NGK plugs. There was no performance difference, just cash savings! We will continue with NGK plugs as we did for 1200 hours on the old engine.

Jim Butcher
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I have had 3 new Rotax engines that came with the Rotax plugs. When they wear out I switch to NGKs. The only advantage of the Rotax plugs is they last twice as long and you never adjust the gap. I'm told the only rule is don't mix and match; must be all one or the other.
 
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