Am wondering if anyone has found an alternative to the long reach Denso IKH 27 spark plugs normally used in the IO-390 with P-Mags. The latest NAPA price is $17.00 each and while still much less than aircraft plugs, it makes me wonder if there is a Plan B out there anywhere.
I previously used the BR8ES short reach plugs in the long reach IO-390 adapters and they are inexpensive and worked well. However, I was never happy with the fact they did not fill the entire length of the long reach adapters.
That left some adapter threads exposed to combustion and I was concerned about the possibility of it causing pre-ignition.
I previously used the BR8ES short reach plugs in the long reach IO-390 adapters and they are inexpensive and worked well. However, I was never happy with the fact they did not fill the entire length of the long reach adapters.
That left some adapter threads exposed to combustion and I was concerned about the possibility of it causing pre-ignition.