Denso 3073 W20FS-U Nickel U-Groove Spark Plug

Denso U-Groove spark plugs feature a u-shaped groove in the ground electrode, giving the flame a groove to grow in, resulting in less flame dissipation and a larger flame front for a more complete combustion. This translates to better fuel efficiency and improved throttle response. Machine rolled threads prevent seizing or cross threading during installation and removal. 100% pre-fired to assure the highest quality possible. Purified alumina powder insulator provides exceptional strength and thermal conductivity. Five rib insulator prevents flashover. Copper-glass seal bonds center electrode and insulator for a gas-tight seal.

• Shell
• Thread Diameter14mm
• Thread Pitch1.25mm
• Seat TypeGasket
• Reach12.7mm (1/2")
• Hex Size13/16" (21mm)
• Terminal TypeRemovable Nut
• Overall HeightJIS
• Gap.028" (0.7mm)

• Center Electrode
• MaterialNickel
• TypeStandard
• Size2.5mm
• ProjectionNon-Projected

• Ground Electrode
• MaterialNickel
• TypeU-Groove
• Quantity1

• Specifications
• ResistorNo
• Heat Range20
• Torque SpecsCast Iron: 26-30 lb. ft. Aluminum: 15-22 lb. ft.

• Part Information
• BrandDenso
• Warranty12 Months
• Longevity20-30k Miles

Automotive

• 1963
  • Chevrolet
    • Corvair Base Verify fitment
    • Corvair Monza Verify fitment
    • Corvair Monza Spyder Verify fitment
• 1962
  • Chevrolet
    • Corvair Base Verify fitment
    • Corvair Monza Verify fitment
    • Corvair Monza Spyder Verify fitment

Powersports

• 1997
  • KTM
    • 50 SXR Pro Jr Base Verify fitment
    • 50 SXR Pro Sr Base Verify fitment
• 1982
  • Yamaha
    • LB50 Base Verify fitment
• 1981
  • Yamaha
    • LB50 Base Verify fitment
• 1975
  • Honda
    • MR50 Base Verify fitment
  • Yamaha
    • TY80 Base Verify fitment
• 1974
  • Honda
    • MR50 Base Verify fitment
  • Yamaha
    • TY80 Base Verify fitment

Commercial & Industrial

• Pumps
  • Makita
    • EW200R Verify fitment
    • EW200TR Verify fitment
    • EW300R Verify fitment
    • EW310TR Verify fitment
  • Fuji Robin
    • SD06 Verify fitment
    • SD06-B Verify fitment
    • SP06B Verify fitment
• Commercial and Industrial Engines
  • Robin
    • TG37 Verify fitment
  • Rotax
    • 370cc Verify fitment
  • Sachs
    • 504 Series Verify fitment
    • 505 Series Verify fitment
    • 508 Series Verify fitment
    • Stamo SL-2 Verify fitment
  • Volkswagen
    • Model 122 Verify fitment
    • Model 124A Verify fitment
  • Wisconsin
    • EY14W Verify fitment
    • EY18-3W Verify fitment
    • EY18W Verify fitment
    • EY25W Verify fitment
    • EY27W Verify fitment
    • EY44W Verify fitment
  • Fuji Robin
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    • EC06 Verify fitment
    • EC06AB Verify fitment
    • EC06AD Verify fitment
    • EC06B Verify fitment
    • EC06D Verify fitment
    • EC07 Verify fitment
    • EC07-2B Verify fitment
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    • EC37D Verify fitment
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    • EH12 (.. / D / B) Verify fitment
    • EH18-VX Verify fitment
    • EH25 (.. / D / B) Verify fitment
    • EY10 Verify fitment
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    • EY12W Verify fitment
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    • EY20 Verify fitment
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    • EY25 Verify fitment
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    • EY27 Verify fitment
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    • EC05 Verify fitment
    • EC05-2B Verify fitment
    • EC25 Verify fitment
    • EY15 Verify fitment
    • EY18-3 Verify fitment
    • FG14 III Verify fitment
  • ILO - Motoren
    • L 101 Verify fitment
    • L 125 Verify fitment
    • L 152 Verify fitment
    • L 197 Verify fitment
    • L 252 Verify fitment
    • L 35 Verify fitment
    • L 372 Verify fitment
    • L 92 Verify fitment
  • JLO-Rockwell
    • G49 Verify fitment
    • GA50 Verify fitment
    • L35 Verify fitment
    • L77 Verify fitment
    • LV298 Verify fitment
    • MM25 Verify fitment
    • MM40 Verify fitment
    • V49 Verify fitment
• Tractors
  • Cockshutt
    • 1250 Verify fitment
• Farm Tractors and Equipment, Construction Machinery
  • Ferguson
    • Standard Engine (1948-1954) Verify fitment
  • International
    • 254 Verify fitment
    • B414 Verify fitment
• Generators
  • Danarm
    • Wisconsin-Robin Verify fitment
  • Generac
    • 5.0 hp Kawasaki Verify fitment
    • G2600 Verify fitment
    • R4000 Verify fitment
    • Robin Verify fitment
    • S1600 Verify fitment
  • Honda
    • E-Series Verify fitment
  • Kawasaki
    • KG 1300 Verify fitment
    • KG 1500 Verify fitment
    • KG 1600 Verify fitment
    • KG 600 Verify fitment
    • KG 700 Verify fitment
    • KG 750 Verify fitment
  • Makita
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    • G3510R Verify fitment
    • G3511R Verify fitment
  • Overlite
    • Wisconsin-Robin Verify fitment
  • Pincor
    • Robin (Exc. EY21) Verify fitment
  • Reiner
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    • CRF3 Verify fitment
  • Robin-Fuji
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    • RG10DC Verify fitment
    • RG121C Verify fitment
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    • RG15 Verify fitment
    • RG15C Verify fitment
    • RG17 Verify fitment
    • RG17D Verify fitment
    • RG201 Verify fitment
    • RG201D Verify fitment
    • RG25 Verify fitment
    • RG25D Verify fitment
    • RG301D Verify fitment
    • RG302 Verify fitment
    • RG33 Verify fitment
    • RG33D Verify fitment
    • RG401 Verify fitment
    • RG401D Verify fitment
  • Tanaka
    • SEG-221 Verify fitment
  • Winpower
    • Robin Verify fitment
• Light & Blower
  • Overlite
    • Wisconsin-Robin Verify fitment
• Industrial Tractors and Lift Trucks
  • Hydra Mac
    • 5C Verify fitment
    • Mini Mac 5 Verify fitment
  • International
    • 3444 Verify fitment
    • 444 Verify fitment
    • 7000 Verify fitment
  • Whiteman
    • Power Buggy Verify fitment

Lawn & Garden

• Chain Saws
  • Husqvarna
    • A100 Verify fitment
    • All Others Verify fitment
    • G90 Verify fitment
    • SM150 Verify fitment
  • Kaaz
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    • G4C Verify fitment
    • G5C Verify fitment
  • Mow-Master
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  • Pro-Star
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  • Solo
    • 08S Verify fitment
  • Stihl
    • 085S Verify fitment
    • 08S Verify fitment
  • Wacker
    • Xenoah G3C Verify fitment
    • Xenoah G4C Verify fitment
    • Xenoah G5C Verify fitment
  • Yard Machine
    • 640 Verify fitment
  • Yard Pro
    • 08S Verify fitment
• Tillers
  • Flymo
    • All Models Verify fitment
  • Merry Tiller
    • Wisconsin Robin Verify fitment
  • Murray
    • Tecumseh OHV Verify fitment
  • Solo
    • 505 Verify fitment
    • 506 Verify fitment
    • 507 Verify fitment
  • Yard Marvel
    • All Models Verify fitment
• Weed Cutters
  • H.M.C.
    • 4000 - 1/2" Reach Verify fitment
    • 4500 - 1/2" Reach Verify fitment
• Augers/Drills
  • Haynes
    • Little Beaver Robin EY18E Verify fitment
  • Little Beaver
    • Wisconsin Robin Verify fitment
• Outdoor Power Equipment
  • Hirth
    • 152 Verify fitment
    • 1440 Verify fitment
  • Hoffco
    • Wisconsin EY18E Verify fitment
  • Honda
    • G 65 Verify fitment
    • G 65K2 Verify fitment
    • G 80 Verify fitment
  • ILO - Motoren
    • G 49 Verify fitment
    • GA 50 Verify fitment
    • LV 298 Verify fitment
    • MM 25 Verify fitment
    • MM 40 Verify fitment
    • V 49 Verify fitment
  • Kawasaki
    • KF 24 Verify fitment
    • KF 53A Verify fitment
    • KF 82 (D) Verify fitment
    • KF52 Verify fitment
    • KF53 Verify fitment
    • KT 29 2-Stroke Verify fitment
    • KT 33 2-Stroke Verify fitment
    • KT 43 2-Stroke Verify fitment
  • Pro-Vac
    • Wisconsin EY18W Verify fitment
  • Robin
    • EC05-2 Verify fitment
    • EC05-2 D Verify fitment
    • EC05-2B Verify fitment
    • EC06 Verify fitment
    • EC06 D Verify fitment
    • EC06B Verify fitment
    • EC07 Verify fitment
    • EC07-2 Verify fitment
    • EC07-2 B Verify fitment
    • EC07-2 D Verify fitment
    • EC08 D Verify fitment
    • EC08B Verify fitment
    • EC25 Verify fitment
    • EC25 D Verify fitment
    • EC25DS Verify fitment
    • EC37-3 Verify fitment
    • EY10 Verify fitment
    • EY10 D Verify fitment
    • EY10B Verify fitment
    • EY13 Verify fitment
    • EY13-2 Verify fitment
    • EY13-2 D Verify fitment
    • EY13-2B Verify fitment
    • EY14 Verify fitment
    • EY14 D Verify fitment
    • EY14B Verify fitment
    • EY18 Verify fitment
    • EY18-2 Verify fitment
    • EY18-3 Verify fitment
    • EY18-3W Verify fitment
    • EY25 Verify fitment
    • EY25-2 Verify fitment
    • EY25W Verify fitment
    • EY27 Verify fitment
    • EY27-2 Verify fitment
    • EY27W Verify fitment
    • EY33 Verify fitment
    • EY33-2 Verify fitment
    • EY35 Verify fitment
    • EY40 Verify fitment
    • EY44 Verify fitment
    • EY44-2 Verify fitment
    • EY44W Verify fitment
  • Tecumseh
    • HH100 Verify fitment
    • HH140 Verify fitment
    • HH160 Verify fitment
    • HH180 Verify fitment
    • OH120 Verify fitment
    • OH140 Verify fitment
    • OH160 Verify fitment
    • OH180 Verify fitment
  • U.S. Motor Power, Inc
    • 61005 Verify fitment
    • 61006 Verify fitment
  • Weed Eater
    • All Models Verify fitment
  • Wisconsin-Robin
    • EY18-W Verify fitment
    • EY25W Verify fitment
    • EY27W Verify fitment
    • EY44W Verify fitment
    • W1-145 Verify fitment
    • W1-185 Verify fitment
    • WO1-115 Verify fitment
    • WO1-150 Verify fitment
    • WO1-210 Verify fitment
    • WO1-300 Verify fitment
    • WO1-300V Verify fitment
    • WO1-340 Verify fitment
    • WO1-340V Verify fitment
    • WO1-430V Verify fitment
    • WO1-560 Verify fitment
    • WO2-510 Verify fitment
    • WT1-125V Verify fitment
    • WT1-145V Verify fitment
    • WT1-185V Verify fitment
    • WT1-450V Verify fitment
  • Xenoah
    • G3C Verify fitment
    • G3C76 Verify fitment
    • G4C Verify fitment
    • G4C63 Verify fitment
    • G4C76 Verify fitment
    • G5E Verify fitment
    • G5E2 Verify fitment
  • Yazoo
    • EY18-3W Verify fitment
    • EY18W Verify fitment
  • Agria
    • Motor Cultivators Verify fitment
• Lawn & Garden Tractors
  • Honda
    • F 400 (G35) Verify fitment
    • F 600 (G42) Verify fitment
    • F 650 Verify fitment
    • F 700 Verify fitment
• Sprayers
  • Hudson
    • All Models Verify fitment
  • Kaaz
    • Kawasaki KF53 Verify fitment
    • Robin EY14 Verify fitment
    • Robin EY18 Verify fitment
    • Robin EY25 Verify fitment
  • Mainline
    • All Models Verify fitment
  • Solo
    • Junior Verify fitment
  • Buffalo Sonic
    • All Models Verify fitment
• Turf Equipment
  • Jacobsen
    • Robin EY25W Verify fitment
• Shredders
  • Mainline
    • All Models Verify fitment
• Snow Thrower
  • Mainline
    • All Models Verify fitment
  • Robin
    • SL550/S EY-18-3 Verify fitment
    • SL680 HS EH-17 Verify fitment
• Blowers, Sprayers, Vacuums
  • Solo
    • 450 Verify fitment
    • 454 Verify fitment
    • 410 Verify fitment
    • 412 Verify fitment
    • 412-B Verify fitment
    • 419 Verify fitment
    • 424 Verify fitment
  • Xenoah
    • EB40 Verify fitment
• Multimotor Engines
  • Solo
    • 100 Verify fitment
    • 101 Verify fitment
• Trimmers & Brush Cutters
  • Weed Eater
    • 1000 Verify fitment
  • Xenoah
    • BC324B Verify fitment
    • FBC12 Verify fitment
    • FBC26 Verify fitment
  • Craftsman
    • 79623 Verify fitment
    • 79624 Verify fitment
    • 795340 Verify fitment
    • 795451 Verify fitment
    • 795453 Verify fitment
    • 795510 Verify fitment
    • 795520 Verify fitment
• Dusters, Misters
  • Xenoah
    • MD40AE Verify fitment
• Power Equipment Engines
  • Bombardier-Rotax
    • 95 - 2-Stroke Verify fitment
    • 182 - 2-Stroke Verify fitment
    • 232 - 2-Stroke Verify fitment
  • ILO - Motoren
    • RM 125 Verify fitment
  • Solo
    • Combi Engines Verify fitment
• Mowers
  • Black Rock
    • Robin EY25W Engine Verify fitment
  • Bunton
    • JLO Engine Verify fitment
    • Honda GV35 Verify fitment
  • Bush Hog
    • Pro-Mower 549 Verify fitment
  • Chain-Tred
    • Honda G35, G42 Verify fitment
  • Jacobsen
    • Robin EY25W Verify fitment
  • Kato
    • Honda G150 Verify fitment
  • Solo
    • 500-Series Verify fitment
    • Pro-Mower 549 Verify fitment
    • Pro-Mower 580 Verify fitment
• Edgers
  • Bunton
    • JLO Verify fitment
    • Robin Verify fitment
• Riding Equipment
  • Craftsman
    • Tecumseh OHV Verify fitment