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Finn,
That sounds a lot like the onset of rpm drop caused by lead fouled plugs. I used to get around 100 hrs and then would start getting Sparkplug SAG (engine rpm dropping off). It seem to get worst during high power (such as take off) engine regimes.
Regapping did not help and I never found a way of removing the lead suspected of providing a grounding path inside the plug.
I would recommend a new set of plugs.
Ed
------ Original Message ------
Date 5/25/2023 9:13:07 AM
Subject [FlyRotary] AR2592 gap
For those of you who use the AR2592 spark plug in the Renesis, do you use the 0.6mm gap the plug comes with? I bought 8 of them some years ago.
I've been using the stock plugs (RE7A and RE9B) for maybe 100 hours by now. Experienced a brief 200 RPM drop on last takeoff. Wondering if it's time to change plugs. Or re-gap the stock plugs to what?
What can I learn by looking at plugs?
Best way to clean them?
Finn
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