"MAXIMUM FIREPOWER"
Working in cooperation with Allied Signal Inc. - the largest manufacturer of automotive spark plugs today - Unison has designed Autolite® Aviation Spark Plugs, specifically engineered to work as part of the complete Unison Ignition System.
Textron Lycoming Engines:
O-235, O-290, O-320, IO-320, LIO-320, AIO-320, O-360, LIO-360, O-435 GO-480, O-540, IO-540, TIO-540, LTIO-540, TIO-541, TIGO-541, IO-720
Teledyne Continental Motors (TCM):
A-65, A75, C85, C90, C-125, C145, E165, E185, 0-200, E225, IO-240, O-300 IO-346, IO-360,
O-470, LIO-520, IO-550, IO-550L
Specification and Cross Reference Chart 1 |
Mount Thread Size |
Reach |
Shielding Thread |
Gap |
Champion PN |
Autolite®
by Unison PN |
Price Per Plug |
18MM |
1/2" |
5/8"-24 |
.016"-.021" |
REM38E |
URHM38E |
$16.25 |
18MM |
1/2" |
3/4"-20 |
.016"-.021" |
RHM38E |
URHM38E |
$16.25 |
18MM |
1/2" |
5/8"-24 |
.016"-.021" |
RHM40E |
URHM40E |
$16.25 |
18MM |
1/2" |
3/4"-20 |
.016"-.021" |
RHM40E |
URHM40E |
$16.25 |
18MM |
13/16" |
3/4"-20 |
.016"-.021" |
RHB32E |
URHB32E |
$16.25 |
18MM |
13/16" |
5/8"-24 |
.016"-.021" |
RHB37E |
UREB37E |
$16.25 |
18MM |
13/16" |
3/4"-20 |
.016"-.021" |
RHB37E |
URHB37E |
$16.25 |
18MM |
1/2" |
5/8"-24 |
.016"-.021" |
REM37BY |
UREM37BY2 |
$16.25 |
1 Cross reference depends on application.
2 UREM37BY is a projected gap design.
Ordering: Specify aircraft make, model and serial number along with engine make and model designation.
