1984 MERCURY Spark Plugs

Spark Plug, Platinum Power, 14mm Thread, .460 in. Reach, Resistor, Each

Part Number: CPN-3018

3.67 out of 5 stars ( 3 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

• $25 Summit Bucks

Spark Plug, RS12YC, Copper Plus, Tapered Seat, 14mm Thread, .708 in. Reach, Projected Tip, Resistor, Each

Part Number: CPN-401

4.5 out of 5 stars ( 4 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

• $25 Summit Bucks

Spark Plug, RV17YC, Copper Plus, 14mm Thread, .460 in. Reach, Resistor, Each

Part Number: CPN-25

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

• $25 Summit Bucks

Spark Plug, Double Platinum, Tapered, 14mm Thread, .460 in. Reach, Resistor, Each

Part Number: CPN-7018

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

• $25 Summit Bucks

Spark Plug, Iridium, Gasket Seat, 14mm Thread, .708 in. Reach, Projected Tip, Resistor, Each

Part Number: CPN-9404

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

• $25 Summit Bucks

Spark Plug, Double Platinum, Tapered Seat, 14mm Thread, 18mm Reach, Projected Tip, Resistor, Each

Part Number: CPN-7963

Not Yet Reviewed

Estimated Ship Date: Monday 4/20/2026 if shipped by air

• $25 Summit Bucks

Spark Plug, RS14YC, Copper Plus, Tapered Seat, 14mm Thread, .708 in. Reach, Projected Tip, Resistor, Each

Part Number: CPN-408

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

• $25 Summit Bucks

Spark Plug, RS9YC, Copper Plus, 14mm Thread, .689 in. Reach, Resistor, Each

Part Number: CPN-304

Not Yet Reviewed

Estimated Ship Date: Monday 4/20/2026 if shipped by air

• $25 Summit Bucks