Champion D21 Spark Plug (502)
Buy Champion D21 spark plugs for your small engine equipment below. Champion
part number 502.
Champion spark plug model number:
D21
Type: Standard  

Gap: .025"

D21 application chart

Other Champion part numbers:
813, C15

D21 cross reference numbers:
AC Delco C88
Autolite 377, 386, 45, 4093
Bosch M10ACO, M12A, M20, M30,
M45T1, M45T5, DR10BC
Denso L14-U, MA16PR-R
NGK A6, WRS, BP7HS
Motorcraft BT9
Champion Spark Plug
Champion Spark Plugs
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D21 spark plug application chart:
ACME Kerosene 18mm Heads
ACME MOTORI Kerosene 18mm Heads
Anzani (British) Super-Single
British Seagull 2 H.P.
British Seagull 3 H.P.
British Seagull 4 H.P.
British Seagull 5 H.P.
British Seagull 6 H.P.
British Seagull Century
British Seagull Century Plus
British Seagull Forty Fthwght
British Seagull Forty Minus
British Seagull Forty Plus
British Seagull Silver Century
British Seagull Silver Century Plus
DITCH WITCH Wisconsin 12.5hp
DITCH WITCH Wisconsin 9hp
JOY Buda H-173 18mm Heads
JOY Buda HP-205 18mm Heads
JOY Case SE 18mm Heads
KOHLER 800W Briggs & Stratton For Fouling
LAUSON Kerosene w/18mm Heads Kerosene
MASTER 18mm Heads
MASTER 20M
NEW WAY All Models
Palmer-Greenwich PW27 18mm Heads  
WIS-CON TOTAL POWER Wisconsin Series AGND 12.5hp
YAZOO/KEES Wisconsin AGND