Genuine Champion Spark Plug Part # 322-1 RN11YC4 

Specifications:

Thread Diameter: 14mm
Thread Pitch: 1.25mm
Seat Type: Gasket
Reach: 19mm (3/4")
Hex Size: 13/16" (21mm)
Terminal Type: Solid
Gap: .039" (1.0mm)

Applications:

Fits Model: GENERAC EPS12, ESP20, HOMELITE 178H148, 180H163, 180HIE63, 190HHY50, CG4800, CG5200, CG6300, CHY5000, HONDA EB11000, EB2500XK1, Eb3000C, EG5000X, EM3000C, EM2500X, EM5000X, EU2000i, EU200i, EU3000iS, EW140, EW171K1, EX3300S, EX3300SKI, EX4500SK1A, EZ1499A, EZ2500A, EZ3500A, EZ5000A, JOHN DEERE G2500K, G4400K, G5500K, G5500KE, KAWASAKI GE2200A1, GE2900A, GE4000, GE4300A, GE4500A, GE5000AS, PP4000

Fits OEM: Carlton SPSCR11, Rotary 7189, Dealer Choice RN11YC4, Oregon 77-025, J. Thomas RN11YC, Dealer Choice 322, Oregon 77-314-1, NHC 268-5903, Sunbelt B1RN11YC4, Autolite 64, Bosch WR8DS, NGK BPR5ES, Nippondenso W16EPR-U, Prime Line 7-01885, Stens 130-542, 130-595 & 130-930 & more