Originally Posted by gasman
For over 34 years Lightspeed has you threading the plug (with anti-seize) into the adapter. Then screw the adapter and the plug into the head.
Torque the PLUG to 15 lb/ft. THEN torque the adapter to 25 lb/ft...... I have never had an adapter come out with the plug. There is 10 lb/ft difference.
If you need to remove the adapter, remove it with the plug installed.
Just a heads-up: I'm doing my 1st annual on my new to me Lightspeed Plasma II equipped -6. I downloaded the manual today from the LSE website; here's a quote:
2.4 SPARK PLUG ADAPTORS AND SPARK PLUGS
• Aircraft engines using 18mm & ½” reach spark plugs use adaptors with the same
outside thread and a 14mm & ¾” reach inside thread.
Use LSE high performance HP plugs, Denso spark plugs starting with a W or NGK
spark plugs starting with a B in their designation.
• Aircraft engines using 18mm & 7/8” reach spark plugs use one of the following:
o LSE long reach adaptors with 12mm inside thread for Denso X27GPR-U
or X24GPR-U or equivalent 12mm spark plugs.
o Optionally, for high performance applications, use LSE HP-LR (long
reach) adaptors with 14mm inside thread for high performance HP-LR
or IKH 14mm spark plugs.
• Install adaptors in cylinder head using the supplied copper washer.
Torque to 35 - 45 ft-lbs using anti-seize compound.
• Install automotive style spark plugs with their washer. Torque to 20 ft-lbs using
BTW, I found one of the Denso plugs about halfway out of the adapter. Rather than figure out why (error vs defect), I just picked up 4 of the 386s from our local auto/farm supply.