STITT Spark Plug Engine Recommendations
for
"S-___-2" Series, 3/4"-20 Aircraft Style
2" 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-79-2

.870"
EA15, E30, EA30, E42 .025"

S-79-2*

.870"
DP60, DPC60, DP80 .025"

S-79-2*

.870"
DPC80, DPC105, DP115 .025"

S-79-2*

.870"
DP125, DPC140, DP160 .025"

S-79-2*

.870"
DPC160, DPC162, DP165 .025"

S-79-2*

.870"
DPC180, DPC230, DPC280 .025"

S-79-2*

.870"
DP300, DPC300, DP325 .025"

S-79-2*

.870"
DPC360, DPC540 .025"

S-79-2*

.870"
DPC600, DPC800 .025"

S-79-2*

.870"
2801, 2802, 2803, 2804 .015"

S-R107-2

5/8"
Pre-combustion chamber modifications & LE engines

 .015"

 S-R107-2*

5/8"

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ARIEL

Engine Model

Plug Gap

STITT Part No.

Reach
162JGS/1, 325JGS/1

.015"

 S-R407XLB8.4-2*

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-2

1/2"
L-795, L-1770, L-2165 .025"

S-E78-2

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-R407LB8.4-2*

1/2"
3/4" REACH CYL. HEADS .015"

S-R407XLB8.4-2*

3/4"
G-343 .015"

S-R407XLB8.4-2*

3/4"
G-342, G-353, G-379 .015"

S-R407LB8.4-2*

1/2"
G-397, G-398, G-399 .015"

S-R407LB8.4-2*

1/2"
3400 SERIES .015"

S-R407XLB12-2*

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-R107-2*

5/8"
MA, HMA .015"

S-R107B8-2*

5/8"
BA, HBA, HBAT, TLA, TCV .015"

S-R107B12-2*

5/8"
HLA, HLAT, TMB, TRA .015"

S-R107B10-2*

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 Consult STITT Factory
GMW, GMWA, GMCA, GMWH
Short Reach (5/8")		 .015"

S-R107B10-2

5/8"
Long Reach (7/8") .015"

S-R717B10-2

.870"
GMX, GMXD, GMXE, GMXH, V250, V275
Short Reach (5/8")		 .015"

S-R107-2*

5/8"
Long Reach (7/8")

 .015"

 S-R717-2*

.870"
LS, LSV 5/8" Reach Center Plug .015"

S-R107B15-2*

5/8"
LS, LSV 5/8" Reach Side Plug .015"

S-R107B13-2

5/8"
LS, LSV 7/8" Reach Center Plug

 .015"

 S-R717B15-2

.870"
LS, LSV 7/8" Reach Side Plug .015"

S-R717B13-2

.870"
LS, LSV 1-1/8" - 12 Heads

 .015"

 S-R912B15-2

.620"
JS .015"

S-R107B10-2*

5/8"
Jet Cell® Pre-Combustion Chambers .010"

S-R717-2**

.870"
QUAD

 .015"

 S-R717B8-2

.870"

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CUMMINS

Engine Model Plug Gap STITT Part No.

Reach
GNHC-4, GNH-220 3/8" Reach .020"

S-R40-2

3/8"
GNH-250, GV-12450 3/8" Reach .020"

S-R40-2

3/8"
GM-12-525 3/8" Reach .020"

S-R40-2

3/8"
GNHC-4, GNH-220 1/2" Reach .020"

S-R407L-2*

1/2"
GNH-250, GV-12450 1/2" Reach .020"

S-R407L-2*

1/2"
GM-12-525 1/2" Reach .020"

S-R407L-2*

1/2"
L10 .015"

S-R407XLB12-2*

3/4"
"B" Series .015"

S-R407XL-2*

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-R407XLB13-2*

3/4"
G-1710, GTA-743, GTA-855 .020"

S-R407XLB13-2*

3/4"
GTA-1710 .020"

S-R407XLB13-2*

3/4"
GTA-19

 .020"

 S-R407XLB15-2*

3/4"
GTA-28

 .020"

 S-R407XLB13-2*

3/4"

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DEERE POWER SYSTEMS

Engine Model Plug Gap STITT Part No.

Reach
6076AFN .015"

S-R407XL-2*

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-R717B18-2*

.870"
HV-16, HVA-16, HVA-20, HA-6 .015"

S-R717B18-2*

.870"

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DETROIT DIESEL

Engine Model Plug Gap STITT Part No.

Reach
S-30G .020"

S-R407XL-2*

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-R107-2*

5/8"
KVSR, KVSE, KVR .015"

S-E72-2

5/8"
TCVD, TLAD .015"

S-R107B12-2*

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 .015"

S-R807LLB20-2*

.812"

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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-2*

3/4"
VSG 413 (1.3 Liter/79 C.I.D.) .015"

S-R407XL-2*

3/4"
LSG 423 (2.3 Liter/140 C.I.D.) .015"

S-RF407XL-2*

.708"
CSG 649 (4.9 Liter/300 C.I.D.) .015"

S-RF840-2

.460"
CSG 850 (5.0 Liter/302 C.I.D.) .015"

S-RF407L-2*

.460"
WSG 858 (5.8 Liter/351 C.I.D.) .015"

S-RF407L-2*

.460"
LSG 875 (7.5 Liter/460 C.I.D.) .015"

S-RF407L-2*

.460"

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GEMINI

Engine Model Plug Gap STITT Part No.

Reach
G26, G35 .020"

S-R407L-2*

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-2

.708"
4.3L (262 C.I.D.) .015"

S-RF407L-2*

.460"
5.0L (305 C.I.D.) .015"

S-RF407L-2*

.460"
5.7L (350 C.I.D.) .015"

S-RF407L-2*

.460"
7.4L (454 C.I.D.) .015"

S-RF407L-2*

.460"

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HERCULES

Engine Model Plug Gap STITT Part No.

Reach
G-1600 .020"

S-R407-2*

3/8"
G2300, G3400 .020"

S-R407-2*

3/8"
G4800 .020"

S-R407XLB8.4-2*

3/4"

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INGERSOLL-RAND

Engine Model Plug Gap STITT Part No.

Reach
JVG, KVG, KVGR, KVT, PJVG, PKV .015"

S-R107-2*

5/8"
PKVGR, PKVT, PSVG, PVG, SVG .015"

S-R107-2*

5/8"
KVR, KVS, KVSR, KVSRA .015"

S-E72-2

5/8"
PKVR, PKVSR .015"

S-E72-2

5/8"
7/8"-18 Heads 7/8" Reach .015"

S-R717-2*

.870"
7/8"-18 Heads 1" Reach .015"

S-R707-2*

1"

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KUBOTA

Engine Model Plug Gap STITT Part No.

Reach
KNG1600E, KNG3200E .015"

S-407XL-2*

3/4"

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LISTER PETTER

Engine Model Plug Gap STITT Part No.

Reach
HR2G, HR3G .015"

S-R807-2*

1/2"

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LORAIN

Engine Model Plug Gap STITT Part No.

Reach
30, 37, 40, 50 .020"

S-R807-2

1/2"
A, L, O, R 7/8"-18 Heads .015"

S-R707-2

1"

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LUFKIN

Engine Model Plug Gap STITT Part No.

Reach
GSC .020"

S-E78-2

5/8"
GSD, GSDH, HC333, HT333 .020"

S-E78-2

5/8"
H795 .015"

S-E78-2

5/8"
H1770, H2165 .015"

S-E78-2

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-R807-2

1/2"
HD-504-6A, HD605-6A .015"

S-R807-2

1/2"
HD-800-6A, HDT-800-60A .015"

S-R807-2

1/2"
HD-1210, HD-1600 .015"

S-R807-2

1/2"
All with 7/8"-18 Heads .020"

S-R107-2

5/8"
All with 14mm Heads .020"

S-R407-2

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-R807-2

1/2"

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SUPERIOR (Cooper Energy Services)

Engine Model Plug Gap STITT Part No.

Reach
6G510, 6G825, 8G825 .020"

S-R807-2*

1/2"
12G825, 16G825 .020"

S-R807-2*

1/2"
6GT510, 6GTL, 80G6, 80GX6 .020"

S-R807-2*

1/2"
6GX825, 6GT825, 8GT825 .020"

S-R807-2*

1/2"
8GTL, 80G8, 80GX8, 8GX825 .020"

S-R807-2*

1/2"
12GT825, 12SGT, 12GTL .020"

S-R807-2*

1/2"
16SGT, 16GTL, 16GT825 .020"

S-R807-2*

1/2"
All GTLA-GTLB Models (Pre-chamber) .015"

S-R807-2NP***

1/2"
All 7/8"-18 Heads .020"

S-R107-2*

5/8"

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WAUKESHA

Engine Model Plug Gap STITT Part No.

Reach
F1197 .020"

S-82-2

1/2"
F817G (14mm Heads) .020"

S-R487-2*

3/8"
F817G (18mm Heads) .020"

S-R847-2*

1/2"
F1905, H2476 .015"

S-R807B5-2*

1/2"
H2475, L3711, L3712 .015"

S-R807B5-2*

1/2"
VRG Series Engines
VRG220, VRG330 .020"

S-R407XL-2*

3/4"
VRG265, VRG283, VRG310 .020"

S-R407XL-2*

3/4"
VRG155, VRG232 .020"

S-R807-2*

1/2"
VHP Series Engines
F2895G, F2895GSI .015"

S-R807B13-2*

1/2"
F3521G, F3521GSI .015"

S-R807B13-2*

1/2"
F3524 GSI Consult STITT Factory
L5108G, L5108GSI .015"

S-R807B13-2*

1/2"
L5790G, L5790GSI .015"

S-R807B13-2*

1/2"
L5794 GSI Consult STITT Factory
L7042G, L7042GSI .015"

S-R807B13-2*

1/2"
L7044 GSI Consult STITT Factory
P9390G, P9390GSI .015"

S-R807B13-2*

1/2"
VHP-GL (Pre-Chamber Engines)
F2895GL, F3521GL, L5108GL .010"

S-R807B13-2**

1/2"
L5790GL, L7042GL, P9390GL .010"

S-R807B13-2**

1/2"
All engines with 18mm - 13/16" reach heads

 .010"

 S-R807LLB13-2*

.812"
VGF Series Engines
F18G, F18GL .010"

S-R807LLB13-2**

.812"
H24G, H24GL .010"

S-R807LLB13-2**

.812"
L36G, L36GL .010"

S-R807LLB13-2**

.812"
P48GL .010"

S-R807LLB13-2**

.812"
VSG Series Engines
F11G, F11GSI .010"

S-R407XLB8.4-2*

3/4"
AT Series Engines
AT25, AT27 .010"

S-R807B20-2**

1/2"
All engines with 18mm - 13/16" reach carriers Consult STITT Factory
Obsolete Engines
180GKB, 190GLB, 195GK .020"

S-R887-2

1/2"
180GL, 190GL, 195GL, 140GK .020"

S-R887-2

1/2"
140GZ, 185GL, 145GKB, WAK .020"

S-R887-2

1/2"
WAKB, WAKC, NK, NKR, LRO .020"

S-R887-2

1/2"
LRZ, VLRO, BA, BL, MB, BK .020"

S-R887-2

1/2"
CHK, CHS, CR, CSR, CU, DHK .020"

S-R887-2

1/2"
DK, DKR, DR, DU, BK, EL, FC .020"

S-R887-2

1/2"
FCL, FCS, FL, FLS, GAK .020"

S-R887-2

1/2"
130GS, 130GL, 140GZ, 180G .020"

S-R887-2

1/2"
MK, ML, MS, MZA, SRK, RBR .020"

S-R887-2

1/2"
F2894G, F2894GSI, F3520G .015"

S-R807-2*

1/2"
L7040G, L5100G, L5788G .015"

S-R807-2*

1/2"
H1077G, L1616G, P2154G .020"

S-R40XL-2*

3/4"

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WORTHINGTON

Engine Model Plug Gap STITT Part No.

Reach
UTC, SUTC, ML, MLV .015"

S-R107B24-2*

5/8"
SEH, SLHC, SLHCA, SLHP .015"

S-R107B24-2*

5/8"
SLDHG, SDHP .015"

S-R107B24-2*

5/8"
LTC, CG, CCG, DG, DDG .015"

S-R107-2*

5/8"
EEG, LFC, LCE, SDHG .015"

S-R107-2*

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