Shielded, 3/4"-20 Aircraft Style, 1" Termination Well Depth

STITT Spark Plug Engine Recommendations
for
Shielded, 3/4"-20 Aircraft Style,
1" Termination Well Depth Plugs
Compatible with CSA, FMR Class 1, Group D, Div. 2 Requirement

Click on the manufacturer of your engine.
AJAX (Cooper Energy Services)	ARIEL
Arrow	CATERPILLAR
CLARK (Dresser Clark)	COOPER-BESSEMER
CUMMINS	CUMMINS NATURAL GAS ENGINES
DEERE POWER SYSTEMS	DELAVAL (Transamerica)
DETROIT DIESEL	DRESSER-RAND
ENTERPRISE (Also see DeLaval)	FAIRBANKS-MORSE (Coltec)
FORD INDUSTRIAL POWER UNITS	GEMINI
GENERAL MOTORS POWERTRAIN	HERCULES
INGERSOLL-RAND	KUBOTA
LISTER PETTER	LORAIN
LUFKIN	M.E.P. INDUSTRIES
MINNEAPOLIS-MOLINE	NORDBERG (Hatch & Kirk)
OILWELL	SUPERIOR (Cooper Energy Services)
WAUKESHA	WORTHINGTON

AJAX (Cooper Energy Services)

Engine Model	Plug Gap	STITT Part No.	Reach
C30, C40, C42, CMA, E-15	.025	S-79*	.870"
EA15, E30, EA30, E42	.025	S-79*	.870"
DP60, DPC60, DP80	.025	S-79*	.870"
DPC80, DPC105, DP115	.025	S-79*	.870"
DP125, DPC140, DP160	.025	S-79*	.870"
DPC160, DPC162, DP165	.025	S-79*	.870"
DPC180, DPC230, DPC280	.025	S-79*	.870"
DP300, DPC300, DP325	.025	S-79*	.870"
DPC360, DPC540	.025	S-79*	.870"
DPC600, DPC800	.025	S-79*	.870"
2801, 2802, 2803, 2804	.015	S-R107*	5/8"
Pre-combustion chamber modifications & LE Engines	.015	S-R107*	5/8"

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ARIEL

Engine Model	Plug Gap	STITT Part No.	Reach
162JGS/1, 325JGS/1	.015	S-R407XLB8.4*	3/4"

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ARROW

Engine Model	Plug Gap	STITT Part No.	Reach
C-46, C-66, C96, C106, C245, C255	.025	S-8MEX	1/2"
L-795, L-1770, L-2165	.025	S-E78	5/8"

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CATERPILLAR

Engine Model	Plug Gap	STITT Part No.	Reach
G-333, G-3304, G-3306
1/2" REACH CYL. HEADS	.015	S-R407LB8.4*	1/2"
3/4" REACH CYL. HEADS	.015	S-R407XLB8.4*	3/4"
G-343	.015	S-R407XLB8.4*	3/4"
G-342, G-353, G-379	.015	S-R407LB8.4*	1/2"
G-397, G-398, G-399	.015	S-R407LB8.4*	1/2"
3400 SERIES	.015	S-R407XLB12*	3/4"
3500 SERIES		Consult STITT Factory
3600 SERIES		Consult STITT Factory

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CLARK (Dresser Clark)

Engine Model	Plug Gap	STITT Part No.	Reach
RA, RAS, HRA, HRAT	.015	S-R107*	5/8"
MA, HMA	.015	S-R107B8*	5/8"
BA, HBA, HBAT, TLA, TCV	.015	S-R107B12*	5/8"
HLA, HLAT, TMB, TRA	.015	S-R107B10*	5/8"
Pre-combustion chamber modifications		Consult STITT Factory

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COOPER-BESSEMER

Engine Model	Plug Gap	STITT Part No.	Reach
GMV, GMVA, GMVC, GMVE, GMVH, GMW, GMWA, GMCA, GMWH, GMX, GMXD, GMXE, GMXH, V50, V75 W-330, Z-330, QUAD
Short Reach (5/8")	.015	S-R107*	5/8"
Long Reach (7/8")	.015	S-R717*	.870"
LS, LSV 5/8" Reach Center Plug	.015	S-R107B15*	5/8"
LS, LSV 5/8" Reach Side Plug	.015	S-R107B13*	5/8"
LS, LSV 7/8" Reach Center Plug	.015	S-R107B15*	5/8"
LS, LSV 7/8" Reach Side Plug	.015	S-R107B13*	5/8"
LS, LSV 1-1/8"-12 Heads	.015	S-R912B15	.620"
JS	.015	S-R107B10*	5/8"
Jet Cell® Pre-Combustion Chambers	.010	S-R717**	.870"

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CUMMINS

Engine Model	Plug Gap	STITT Part No.	Reach
GNHC-4, GNH20 3/8" Reach	.020	S-R40	3/8"
GNH50, GV-12450 3/8" Reach	.020	S-R40	3/8"
GM-12-525 3/8" Reach	.020	S-R40	3/8"
GNHC-4, GNH20 1/2" Reach	.020	S-R407L*	1/2"
GNH50, GV-12450 1/2" Reach	.020	S-R407L*	1/2"
GM-12-525 1/2" Reach	.020	S-R407L*	1/2"
L10	.015	S-R407XLB12*	3/4"
"B" Series	.015	S-R407XL*	3/4"

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CUMMINS NATURAL GAS ENGINES

Engine Model	Plug Gap	STITT Part No.	Reach
G-495, G-743, G-855	.020	S-R407XLB13*	3/4"
G-1710, GTA-743, GTA-855	.020	S-R407XLB13*	3/4"
GTA-1710	.020	S-R407XLB13*	3/4"
GTA-19	.020	S-R407XLB15*	3/4"
GTA-28	.020	S-R407XLB13*	3/4"

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DEERE POWER SYSTEMS

Engine Model	Plug Gap	STITT Part No.	Reach
6076AFN	.015	S-R407XL*	3/4"

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DELAVAL (Transamerica)

Engine Model	Plug Gap	STITT Part No.	Reach
HV-8, HVA-8, HV-12, HVA-12	.015	S-R717B18*	.870"
HV-16, HVA-16, HVA0, HA-6	.015	S-R717B18*	.870"

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DETROIT DIESEL

Engine Model	Plug Gap	STITT Part No.	Reach
S-30G	.020	S-R407XL*	3/4"
S-50G, S-60G		Consult STITT Factory

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DRESSER-RAND

Engine Model	Plug Gap	STITT Part No.	Reach
KVGR	.015	S-R107*	5/8"
KVSR, KVSE, KVR	.015	S-E72	5/8"
TCVD, TLAD	.015	S-R107B12*	5/8"
Pre-chamber modifications		Consult STITT Factory

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ENTERPRISE (Also see DeLaval)

Engine Model	Plug Gap	STITT Part No.	Reach
All engines with 18mm 13/16" Reach
Cylinder Heads		Consult STITT Factory

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FAIRBANKS-MORSE (Coltec)

Engine Model	Plug Gap	STITT Part No.	Reach
OP38 Series		Consult STITT Factory

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FORD INDUSTRIAL POWER UNITS

Engine Model	Plug Gap	STITT Part No.	Reach
VSG 411 (1.1 Liter/67 C.I.D.)	.015	S-R407XL-MC*	3/4"
VSG 413 (1.3 Liter/79 C.I.D.)	.015	S-R407XL-MC*	3/4"
LSG 423 (2.3 Liter/140 C.I.D.)	.015	S-R407XL-MC*	3/4"
CSG 649 (4.9 Liter/300 C.I.D.)	.015	S-RF840	.460"
CSG 850 (5.0 Liter/302 C.I.D.)	.015	S-RF407L-MC*	.460"
WSG 858 (5.8 Liter/351 C.I.D.)	.015	S-RF407L-MC*	.460"
LSG 875 (7.5 Liter/460 C.I.D.)	.015	S-RF407L-MC*	.460"

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GEMINI

Engine Model	Plug Gap	STITT Part No.	Reach
G26, G35	.020	S-R407L*	1/2"

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GENERAL MOTORS POWERTRAIN

Engine Model	Plug Gap	STITT Part No.	Reach
2.2L (133 C.I.D.)	.015	S-RF407XL	.708"
4.3L (262 C.I.D.)	.015	S-RF407L*	.460"
5.0L (305 C.I.D.)	.015	S-RF407L*	.460"
5.7L (350 C.I.D.)	.015	S-RF407L*	.460"
7.4L (454 C.I.D.)	.015	S-RF407L*	.460"

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HERCULES

Engine Model	Plug Gap	STITT Part No.	Reach
G-1600	.020	S-R407*	3/8"
G2300, G3400	.020	S-R407*	3/8"
G4800	.020	S-R407XLB8.4*	3/4"

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INGERSOLL-RAND

Engine Model	Plug Gap	STITT Part No.	Reach
JVG, KVG, KVGR, KVT, PJVG, PKV	.015	S-R107*	5/8"
PKVGR, PKVT, PSVG, PVG, SVG	.015	S-R107*	5/8"
KVR, KVS, KVSR, KVSRA	.015	S-E72	5/8"
PKVR, PKVSR	.015	S-E72	5/8"
7/8"-18 Heads 7/8" Reach	.015	S-R717*	.870"
7/8"-18 Heads 1" Reach	.015	S-R707*	1"

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KUBOTA

Engine Model	Plug Gap	STITT Part No.	Reach
KNG1600E, KNG3200E	.015	S-407XL*	3/4"

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LISTER PETTER

Engine Model	Plug Gap	STITT Part No.	Reach
HR2G, HR3G	.015	S-R807*	1/2"

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LORAIN

Engine Model	Plug Gap	STITT Part No.	Reach
30, 37, 40, 50	.020	S-R807	1/2"
A, L, O, R 7/8"-18 Heads	.015	S-R707	1"

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LUFKIN

Engine Model	Plug Gap	STITT Part No.	Reach
GSC	.020	S-E78	5/8"
GSD, GSDH, HC333, HT333	.020	S-E78	5/8"
H795	.015	S-E78	5/8"
H1770, H2165	.015	S-E78	5/8"

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M.E.P. INDUSTRIES

Engine Model	Plug Gap	STITT Part No.	Reach
M.E.P. 6, 8, 10, 12		Consult STITT Factory

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MINNEAPOLIS-MOLINE

Engine Model	Plug Gap	STITT Part No.	Reach
HD-336-4A, HE-425-6A	.015	S-R807	1/2"
HD-504-6A, HD605-6A	.015	S-R807	1/2"
HD-800-6A, HDT-800-60A	.015	S-R807	1/2"
HD-1210, HD-1600	.015	S-R807	1/2"
All with 7/8"-18 Heads	.020	S-R107	5/8"
All with 14mm Heads	.020	S-R407	3/8"

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NORDBERG (Hatch & Kirk)

Engine Model	Plug Gap	STITT Part No.	Reach
FSE96		Consult STITT Factory

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OILWELL

Engine Model	Plug Gap	STITT Part No.	Reach
All 18mm Heads	.020	S-R807	1/2"

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SUPERIOR (Cooper Energy Services)

Engine Model	Plug Gap	STITT Part No.	Reach
6G510, 6G825, 8G825	.020	S-R807*	1/2"
12G825, 16G825	.020	S-R807*	1/2"
6GT510, 6GTL, 80G6, 80GX6	.020	S-R807*	1/2"
6GX825, 6GT825, 8GT825	.020	S-R807*	1/2"
8GTL, 80G8, 80GX8, 8GX825	.020	S-R807*	1/2"
12GT825, 12SGT, 12GTL	.020	S-R807*	1/2"
16SGT, 16GTL, 16GT825	.020	S-R807*	1/2"
All GTLA-GTLB Models (Pre-chamber)	.020	S-R807NP***	1/2"
All 7/8"-18 Heads	.020	S-R107*	5/8"

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WAUKESHA

Engine Model	Plug Gap	STITT Part No.	Reach
F1197	.020	S-82	1/2"
F817G (14mm Heads)	.020	S-R487*	3/8"
F817G (18mm Heads)	.020	S-R847*	1/2"
F1905, H2476	.015	S-R807*	1/2"
H2475, L3711, L3712	.015	S-R807*	1/2"
VRG Series Engines
VRG220, VRG330	.020	S-R407XL*	3/4"
VRG265, VRG283, VRG310	.020	S-R407XL*	3/4"
VRG155, VRG232	.020	S-R807*	1/2"
VHP Series Engines
F2895G, F2895GSI	.015	S-R807B13*	1/2"
F3521G, F3521GSI	.015	S-R807B13*	1/2"
F3594 GSI		Consult STITT Factory
L5108G, L5108GSI	.015	S-R807B13*	1/2"
L5790G, L5790GSI	.015	S-R807B13*	1/2"
L5794 GSI		Consult STITT Factory
L7042G, L7042GSI	.015	S-R807B13*	1/2"
L7044 GSI		Consult STITT Factory
P9390G, P9390GSI	.015	S-R807B13*	1/2"
VHP-GL (Pre-Chamber Engines)
F2895GL, F3521GL, L5108GL	.010	S-R807B13**	1/2"
L5790GL, L7042GL, P9390GL	.010	S-R807B13**	1/2"
All engines with 18mm - 13/16" reach heads	.010	S-R807LLB13	.812"
VGF Series Engines
F18G, F18GL		Consult STITT Factory
H24G, H24GL		Consult STITT Factory
L36G, L36GL		Consult STITT Factory
P48GL		Consult STITT Factory
VSG Series Engines
F11G, F11GSI	.010	S-R407XLB8.4*	3/4"
AT Series Engines
AT25, AT27	.010	S-R807B20**	1/2"
All engines with 18mm - 13/16" reach carriers		Consult STITT Factory
Obsolete Engines
180GKB, 190GLB, 195GK	.020	S-R887	1/2"
180GL, 190GL, 195GL, 140GK	.020	S-R887	1/2"
140GZ, 185GL, 145GKB, WAK	.020	S-R887	1/2"
WAKB, WAKC, NK, NKR, LRO	.020	S-R887	1/2"
LRZ, VLRO, BA, BL, MB, BK	.020	S-R887	1/2"
CHK, CHS, CR, CSR, CU, DHK	.020	S-R887	1/2"
DK, DKR, DR, DU, BK, EL, FC	.020	S-R887	1/2"
FCL, FCS, FL, FLS, GAK	.020	S-R887	1/2"
130GS, 130GL, 140GZ, 180G	.020	S-R887	1/2"
MK, ML, MS, MZA, SRK, RBR	.020	S-R887	1/2"
F2894G, F2894GSI, F3520G	.015	S-R807*	1/2"
L7040G, L5100G, L5788G	.015	S-R807*	1/2"
H1077G, L1616G, P2154G	.020	S-R40XL	3/4"

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WORTHINGTON

Engine Model	Plug Gap	STITT Part No.	Reach
UTC, SUTC, ML, MLV	.015	S-R107B24*	5/8"
SEH, SLHC, SLHCA, SLHP	.015	S-R107B24*	5/8"
SLDHG, SDHP	.015	S-R107B24*	5/8"
LTC, CG, CCG, DG, DDG	.015	S-R107*	5/8"
EEG, LFC, LCE, SDHG	.015	S-R107*	5/8"
Horizontal, All Models		Consult STITT Factory

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* See STITT Precious Metal Catalog PM-REC 0100-5M

** Call STITT Factory for Annular Gap Spark Plug Recommendations

*** Anti-Galling Surface Finish