Part Type

Spark Plugs

Spark plug hub for cross-referencing common small-engine plug numbers and verifying gap, reach, heat range, and terminal style.

Verify before ordering: Fitment can vary by serial number, production date, region, and sub-model. Match the OEM number and physical dimensions before ordering.

Models in This Hub

Common Parts to Verify

Part Type	Model	OEM / Spec	Common Option	Confidence
Spark Plug	Briggs & Stratton 450e Series	491055S	Champion RC12YC	Medium
Spark Plug	Briggs & Stratton 500e Series	796112S	Champion RC12YC	Medium
Spark Plug	Briggs & Stratton 550ex Series	796112S	Champion RC12YC	Confidence not assigned
Spark Plug	Briggs & Stratton 625ex Series	796112S	Champion RC12YC	Confidence not assigned
Spark Plug	Briggs & Stratton 675ex Series	796112S	Champion RC12YC	Confidence not assigned
Spark Plug	Briggs & Stratton 725EXi Series	796112S	Champion RC12YC	Confidence not assigned
Spark Plug	Briggs & Stratton 850EXi Series	796112S	Champion RC12YC	Confidence not assigned
Spark Plug	Echo CS-310	90023Y	Champion CJ8Y	Confidence not assigned
Spark Plug	Echo CS-330T	90023Y	Champion CJ8Y	Confidence not assigned
Spark Plug	Echo CS-352	90023Y	Champion CJ8Y	Confidence not assigned
Spark Plug	Echo CS-355T	90023Y	Champion CJ8Y	Confidence not assigned
Spark Plug	Echo CS-400	90023Y	Champion CJ8Y	Confidence not assigned
Spark Plug	Echo CS-440	90023Y	Champion CJ8Y	Confidence not assigned
Spark Plug	Echo CS-500P	90023Y	Champion CJ8Y	Confidence not assigned
Spark Plug	Echo CS-590 Timber Wolf	90023Y	Champion CJ8Y	Confidence not assigned
Spark Plug	Echo PB-250LN	90023Y	Champion CJ8Y	Confidence not assigned
Spark Plug	Echo PB-500	A425000000	NGK BPMR8Y	Confidence not assigned
Spark Plug	Echo PB-580T	90023Y	Champion CJ8Y	Confidence not assigned
Spark Plug	Echo PB-770	15901019830	NGK BPM8Y	Confidence not assigned
Spark Plug	Echo SRM-210	90023Y	Champion CJ8Y	Confidence not assigned
Spark Plug	Echo SRM-225	90023Y	Champion CJ8Y	Medium
Spark Plug	Echo SRM-230	90023Y	Champion CJ8Y	Confidence not assigned
Spark Plug	Echo SRM-266	90023Y	Champion CJ8Y	Confidence not assigned
Spark Plug	Echo SRM-280	90023Y	Champion CJ8Y	Confidence not assigned

Related Verification Guides

Champion RCJ6Y Cross Reference: NGK BPMR7A Equivalent & GapNGK's catalog cross-references Champion RCJ6Y to NGK BPMR7A (stock no. 4626). Compare thread, reach, and resistor specs, and see the gap for Stihl and Husqvarna equipment.Champion RCJ7Y NGK Equivalent: BPMR7A Cross Reference & GapNGK's catalog cross-references Champion RCJ7Y to NGK BPMR7A (stock no. 4626). See the shared specs and the gap used on Husqvarna and Poulan Pro chainsaws.Champion RCJ6Y vs RCJ7Y: Heat Range Difference ExplainedChampion RCJ6Y and RCJ7Y share the same thread, reach, and resistor design. RCJ7Y is one step hotter. See which equipment specifies each and the NGK equivalent.NGK BPMR7A vs BPMR8Y: Heat Range and Electrode DifferencesNGK BPMR7A and BPMR8Y share a 14 mm thread and 9.5 mm reach. BPMR8Y is one step colder with a V-grooved projected electrode. See which equipment uses each.

Before Buying

Match plug number, thread reach, seat style, resistor type, terminal style, and required gap.
Use the model page as the tie-breaker when the old plug disagrees with a generic listing.
A correct cross-reference can still be wrong if the gap or terminal cap style is different.