Champion RHB37E Standard Electrode Aviation Spark Plug

Thread size: 18 mm
Reach: 13/16"/2.06 cm
Shielded Threading: 3/4" - 20
Standard Electrode: Two Prong
Plug Gap: .016"-.021"/0.41-0.53 mm

can be used for following engine types:

ALLISON

V1710

FRANKLIN ENGINE CO.

6AS-335-A, B, 6AS-350-A, -A1

6V335-A1A, A1B

6VS-335-A, -B

PRATT & WHITNEY

R-1830 (Twin Wasp C)

R-2000 (Twin Wasp D)

R-2800 (Double Wasp) R-2800-97

CA3, CA5, CA15, CA17, CA18, CA19

R-4360 (Wasp Major)

PEZETEL (WSK)

ASZ-621R, (1000 h. p.), P2L-3S (600 h. p.)

TELEDYNE CONTINENTAL MOTORS

R9A

TEXTRON LYCOMING

AEIO-320-E

IO-320-C, -F, LIO-320-C (Long Reach)

IO-360-A, IO-360-C1F

IO-360-F (Long Reach)

IVO-360

TIO-360-A, -B, AEIO-360-A (Long Reach)

TO-360-A1A6D, TO-360-C1A6D, TO-360-E

TO-360-F1A6D, LTO-360-A1A6D, LTO-360-E

VO-435-A, -B (Long Reach)

TVO-435-A, -B, -C, -D, -E, -F, -G (Long Reach)

O-435-23-25

GO-480-G1, G2 (Long Reach)

GSO-480-A, -B (Long Reach)

IGSO-480-A (Long Reach)

IGO-480-A

O-480-1-3

IO-540-AA, -E, -G, -J, -K, -M, -P, -R, -S, -U

O-540-L3C5D, M1B5D (Long Reach)

O-540-9

VO-540-Series

IVO-540 Series (Long Reach)

IGO-540-A, -B (Long Reach)

TIO-540-A, -C, -E, -F, -G, -H, -J, -K, -N, -R, -S, -T

IGO-540-A, -B

LTIO-540-F, -J, -N, -R

TIO-541-A, -E

TIGO-541-A, -E

IO-580-A

IO-720-A, -B, -C, -D (Long Reach)

WRIGHT AERONAUTICAL

Whirlwind R-760, R-975 (18mm 13/16" Rch.)

Cyclone R-1300

Cyclone R-1820 Series (Except F & HE)

Cyclone R-2600 Series

Cyclone R-3350, C18BA, C18BD