QL77JC4 Champion Spark Plug

Replaces OEM 0502180. Plug Type QL77JC4Seat Type GasketHex Size (Inch) 0.813Hex Size (MM) 20.650Thread Size (Inch) 0.551Thread Size (MM) 14.000Thread Reach (Inch) 0.5Taper Diameter (Inch) 0.25Installed Height (Inch) 2.24Gap (Inch) 0.028-0.033Gap (MM) 0.71-0.84Center Electrode Diameter (Inch) 0.1Center Electrode Material Nickel Copper AlloyGround Electrode Material Nickel Copper AlloyGround Electrode Quantity 1Classification Champion Copper Plus Small EngineResistor Plug YesResistor Type Q-Type Inductive SuppressorManufacturer Heat Range 77Electrical Terminal Type Non-Removable Nut Champion Champion Spark Plug - Ql77jc4/828m is equivalent to parts: 509925 Evinrude Johnson OMC BRP 507969 Evinrude Johnson OMC BRP 502180 Evinrude Johnson OMC BRP 896329828 Mercury Marine 828S Mercury Marine 33896329828 Mercury Marine 33   828S Mercury Marine