Select a vehicle to find exact fit parts

Back to vehicles list

Shop By Product Matching "Autolite"

Choose a Model for your 1978 Mercury

Bobcat Cougar Grand Marquis Marquis Monarch Zephyr

Showing 1 - 10 of 24 products

Sort:

Show:

Image

SKU

Product

Rating

Price

1978 Mercury Zephyr Spark Plug 4 Cyl 2.3L Autolite

Autolite AP105 Platinum Spark Plug
Replaces Original Half Thread Design
Platinum Spark Plug
Product Attributes:
- Center Electrode Projection: Mid Projection
- Center Electrode Insulator Tip Projection:
  - 0.133
  - 3.38
- Seat Type: Tapered
- Washer Included: No
- Electrical Terminal Type: Non-removable Nut
- Ground Electrode Quantity: 1
- Grade Type: Performance
- Core Nose Length:
  - 0.65
  - 16.51
- Ground Electrode Tip Material: Nickel
- Center Electrode Core Material: Copper
- Hex Type: Hex
- Resistor Type: Yes
- Insulator Material: Ceramic
- Indexed: No
- Hex Size: 5/8
- Reach:
  - 0.679
  - 17.25
- Center Electrode Tip Material: Platinum
- Ground Electrode Tip Design: Standard
- Pre-Gap Size:
  - 0.05
  - 1.27
- Resistance: 4000
- Insulator Height:
  - 2.026
  - 51.46
Features:
- Engineered with a platinum firing tip that prevents gap erosion for longer service life.
- Its high alumina ceramic insulator provides thermal conductivity and superior insulation for increased strength.
- The multi-rib insulator prevents flash-over.
- Designed with a nickel-plated shell that is corrosion resistant to provide increased durability for extended life.
Autolite® Platinum spark plugs are engineered with a platinum center electrode firing tip that provides improved performance and increased durability, making it a reliable choice for all older engine applications and designs. Its platinum design delivers quicker firing, smoother starts, for better acceleration, and improved fuel efficiency.
Suggested Purchase Quantity: 6
- Most jobs typically require 6 of this item.
This item must be purchased in quantities of 4

Additional Fitment Information:

Vehicle	Block	CC	Engine	CID
1978 - Mercury Zephyr	L	-	4 Cyl 2.3L	140

50 In Stock

Limited-Time Offer

$8.43 USD

$10.12 USD


Brand	Autolite
Part #	A77AP105
Condition	New
Warehouse	B

UPC: 009100262189

1978 Mercury Bobcat Spark Plug 6 Cyl 2.8L Autolite

Autolite AP105 Platinum Spark Plug
Replaces Original Half Thread Design
Platinum Spark Plug
Product Attributes:
- Center Electrode Projection: Mid Projection
- Center Electrode Insulator Tip Projection:
  - 0.133
  - 3.38
- Seat Type: Tapered
- Washer Included: No
- Electrical Terminal Type: Non-removable Nut
- Ground Electrode Quantity: 1
- Grade Type: Performance
- Core Nose Length:
  - 0.65
  - 16.51
- Ground Electrode Tip Material: Nickel
- Center Electrode Core Material: Copper
- Hex Type: Hex
- Resistor Type: Yes
- Insulator Material: Ceramic
- Indexed: No
- Hex Size: 5/8
- Reach:
  - 0.679
  - 17.25
- Center Electrode Tip Material: Platinum
- Ground Electrode Tip Design: Standard
- Pre-Gap Size:
  - 0.05
  - 1.27
- Resistance: 4000
- Insulator Height:
  - 2.026
  - 51.46
Features:
- Engineered with a platinum firing tip that prevents gap erosion for longer service life.
- Its high alumina ceramic insulator provides thermal conductivity and superior insulation for increased strength.
- The multi-rib insulator prevents flash-over.
- Designed with a nickel-plated shell that is corrosion resistant to provide increased durability for extended life.
Autolite® Platinum spark plugs are engineered with a platinum center electrode firing tip that provides improved performance and increased durability, making it a reliable choice for all older engine applications and designs. Its platinum design delivers quicker firing, smoother starts, for better acceleration, and improved fuel efficiency.
Suggested Purchase Quantity: 6
- Most jobs typically require 6 of this item.
This item must be purchased in quantities of 4

This Part Fits the Following OEM/Substitute Numbers:

19145287, 3, 6702, 6W12, AGSF42F1M, AWSF42, AWSF42C, AWSF42P, R44LTS, SP419

Additional Fitment Information:

Vehicle	Block	CC	Engine	CID
1978 - Mercury Bobcat	V	-	6 Cyl 2.8L	171

50 In Stock

Limited-Time Offer

$8.43 USD

$10.12 USD


Brand	Autolite
Part #	A77AP105
Condition	New
Warehouse	B

UPC: 009100262189

1978 Mercury Bobcat Spark Plug 6 Cyl 2.8L Autolite

Autolite AP105 Platinum Spark Plug
Gap .034 (in)
Platinum Spark Plug
Product Attributes:
- Center Electrode Projection: Mid Projection
- Center Electrode Insulator Tip Projection:
  - 0.133
  - 3.38
- Seat Type: Tapered
- Washer Included: No
- Electrical Terminal Type: Non-removable Nut
- Ground Electrode Quantity: 1
- Grade Type: Performance
- Core Nose Length:
  - 0.65
  - 16.51
- Ground Electrode Tip Material: Nickel
- Center Electrode Core Material: Copper
- Hex Type: Hex
- Resistor Type: Yes
- Insulator Material: Ceramic
- Indexed: No
- Hex Size: 5/8
- Reach:
  - 0.679
  - 17.25
- Center Electrode Tip Material: Platinum
- Ground Electrode Tip Design: Standard
- Pre-Gap Size:
  - 0.05
  - 1.27
- Resistance: 4000
- Insulator Height:
  - 2.026
  - 51.46
Features:
- Engineered with a platinum firing tip that prevents gap erosion for longer service life.
- Its high alumina ceramic insulator provides thermal conductivity and superior insulation for increased strength.
- The multi-rib insulator prevents flash-over.
- Designed with a nickel-plated shell that is corrosion resistant to provide increased durability for extended life.
Autolite® Platinum spark plugs are engineered with a platinum center electrode firing tip that provides improved performance and increased durability, making it a reliable choice for all older engine applications and designs. Its platinum design delivers quicker firing, smoother starts, for better acceleration, and improved fuel efficiency.
Suggested Purchase Quantity: 6
- Most jobs typically require 6 of this item.
This item must be purchased in quantities of 4

Additional Fitment Information:

Vehicle	Block	CC	Engine	CID
1978 - Mercury Bobcat	V	-	6 Cyl 2.8L	171

50 In Stock

Limited-Time Offer

$8.43 USD

$10.12 USD


Brand	Autolite
Part #	A77AP105
Condition	New
Warehouse	B

UPC: 009100262189

1978 Mercury Zephyr Spark Plug 4 Cyl 2.3L Autolite

Autolite AP105 Platinum Spark Plug
Gap .034 (in)
Platinum Spark Plug
Product Attributes:
- Center Electrode Projection: Mid Projection
- Center Electrode Insulator Tip Projection:
  - 0.133
  - 3.38
- Seat Type: Tapered
- Washer Included: No
- Electrical Terminal Type: Non-removable Nut
- Ground Electrode Quantity: 1
- Grade Type: Performance
- Core Nose Length:
  - 0.65
  - 16.51
- Ground Electrode Tip Material: Nickel
- Center Electrode Core Material: Copper
- Hex Type: Hex
- Resistor Type: Yes
- Insulator Material: Ceramic
- Indexed: No
- Hex Size: 5/8
- Reach:
  - 0.679
  - 17.25
- Center Electrode Tip Material: Platinum
- Ground Electrode Tip Design: Standard
- Pre-Gap Size:
  - 0.05
  - 1.27
- Resistance: 4000
- Insulator Height:
  - 2.026
  - 51.46
Features:
- Engineered with a platinum firing tip that prevents gap erosion for longer service life.
- Its high alumina ceramic insulator provides thermal conductivity and superior insulation for increased strength.
- The multi-rib insulator prevents flash-over.
- Designed with a nickel-plated shell that is corrosion resistant to provide increased durability for extended life.
Autolite® Platinum spark plugs are engineered with a platinum center electrode firing tip that provides improved performance and increased durability, making it a reliable choice for all older engine applications and designs. Its platinum design delivers quicker firing, smoother starts, for better acceleration, and improved fuel efficiency.
Suggested Purchase Quantity: 6
- Most jobs typically require 6 of this item.
This item must be purchased in quantities of 4

Additional Fitment Information:

Vehicle	Block	CC	Engine	CID
1978 - Mercury Zephyr	L	-	4 Cyl 2.3L	140

50 In Stock

Limited-Time Offer

$8.43 USD

$10.12 USD


Brand	Autolite
Part #	A77AP105
Condition	New
Warehouse	B

UPC: 009100262189

1978 Mercury Zephyr Spark Plug 6 Cyl 3.3L Autolite

Autolite 46 Copper Spark Plug
OE Style; Auto
Copper Spark Plug
Product Attributes:
- Center Electrode Projection: Long Projection
- Center Electrode Insulator Tip Projection:
  - 0.178
  - 4.52
- Seat Type: Tapered
- Electrical Terminal Type: Non-removable Nut
- Ground Electrode Quantity: 1
- Grade Type: Regular
- Core Nose Length:
  - 0.77
  - 19.56
- Ground Electrode Tip Material: Nickel
- Center Electrode Core Material: Copper
- Hex Type: Hex
- Resistor Type: Yes
- Insulator Material: Ceramic
- Indexed: No
- Hex Size: 13/16
- Reach:
  - 0.438
  - 11.13
- Center Electrode Tip Material: Nickel
- Ground Electrode Tip Design: Standard
- Manufacturer Heat Range: 7
- Pre-Gap Size:
  - 0.044
  - 1.12
- Resistance: 4000
- Insulator Height:
  - 2.383
  - 60.53
Features:
- The copper core center electrode aids in thermal control and improves resistance to fouling.
- Its specially engineered high nickel alloy center and ground electrode provides extended life.
- The high alumina multi-rib ceramic insulator provides thermal conductivity and superior insulation for increased strength.
- Designed with a nickel-plated shell that is corrosion resistant to provide increased durability for extended periods.
Autolite® Copper spark plugs are engineered to deliver quick starts and the power your vehicle or applications needs to meet performance expectations.
Suggested Purchase Quantity: 6
- Most jobs typically require 6 of this item.
This item must be purchased in quantities of 4

This Part Fits the Following OEM/Substitute Numbers:

05613886, 11, 19310641, 2021, 4011, 5005, 5569964, 5612142, 5612592, 5613807, 5613860, 5613886, 80038, 8129821, 8129825, 8129847, 834241-MI, 85T...VIEW MORE

Additional Fitment Information:

Vehicle	Block	CC	Engine	CID
1978 - Mercury Zephyr	L	-	6 Cyl 3.3L	200

58 In Stock

Limited-Time Offer

$8.46 USD

$10.15 USD


Brand	Autolite
Part #	A7746
Condition	New
Warehouse	B

UPC: 009100000460

1978 Mercury Zephyr Spark Plug 6 Cyl 3.3L Autolite

Autolite 46 Copper Spark Plug
Gap .050 (in); Auto
Copper Spark Plug
Product Attributes:
- Center Electrode Projection: Long Projection
- Center Electrode Insulator Tip Projection:
  - 0.178
  - 4.52
- Seat Type: Tapered
- Electrical Terminal Type: Non-removable Nut
- Ground Electrode Quantity: 1
- Grade Type: Regular
- Core Nose Length:
  - 0.77
  - 19.56
- Ground Electrode Tip Material: Nickel
- Center Electrode Core Material: Copper
- Hex Type: Hex
- Resistor Type: Yes
- Insulator Material: Ceramic
- Indexed: No
- Hex Size: 13/16
- Reach:
  - 0.438
  - 11.13
- Center Electrode Tip Material: Nickel
- Ground Electrode Tip Design: Standard
- Manufacturer Heat Range: 7
- Pre-Gap Size:
  - 0.044
  - 1.12
- Resistance: 4000
- Insulator Height:
  - 2.383
  - 60.53
Features:
- The copper core center electrode aids in thermal control and improves resistance to fouling.
- Its specially engineered high nickel alloy center and ground electrode provides extended life.
- The high alumina multi-rib ceramic insulator provides thermal conductivity and superior insulation for increased strength.
- Designed with a nickel-plated shell that is corrosion resistant to provide increased durability for extended periods.
Autolite® Copper spark plugs are engineered to deliver quick starts and the power your vehicle or applications needs to meet performance expectations.
Suggested Purchase Quantity: 6
- Most jobs typically require 6 of this item.
This item must be purchased in quantities of 4

Additional Fitment Information:

Vehicle	Block	CC	Engine	CID
1978 - Mercury Zephyr	L	-	6 Cyl 3.3L	200

58 In Stock

Limited-Time Offer

$8.46 USD

$10.15 USD


Brand	Autolite
Part #	A7746
Condition	New
Warehouse	B

UPC: 009100000460

1978 Mercury Monarch Spark Plug 8 Cyl 5.0L Autolite

Autolite APP26 Double Platinum Spark Plug
Gap .050 (in)
Double Platinum Spark Plug
Product Attributes:
- Center Electrode Projection: Mid Projection
- Center Electrode Insulator Tip Projection:
  - 0.133
  - 3.38
- Seat Type: Tapered
- Washer Included: No
- Electrical Terminal Type: Non-removable Nut
- Ground Electrode Quantity: 1
- Grade Type: Performance
- Core Nose Length:
  - 0.822
  - 20.88
- Ground Electrode Tip Material: Platinum
- Center Electrode Core Material: Copper
- Hex Type: Hex
- Resistor Type: Yes
- Insulator Material: Ceramic
- Indexed: No
- Hex Size: 5/8
- Reach:
  - 0.431
  - 10.95
- Center Electrode Tip Material: Platinum
- Ground Electrode Tip Design: Standard
- Manufacturer Heat Range: 7
- Pre-Gap Size:
  - 0.035
  - 0.89
- Resistance: 4000
- Insulator Height:
  - 2.47
  - 62.74
Features:
- Engineered with a platinum-to-platinum design that prevents gap erosion, extending the life of the spark plug.
- The yttrium-Enhanced Ground Electrode delivers superior heat transfer that delivers more durability under high temps and pressure for greater life.
- Its high alumina ceramic insulator provides optimum thermal conductivity and dielectric strength.
- The multi-rib insulator prevents flash-over.
Autolite® Double Platinum spark plugs have a platinum-to-platinum design that decreases gap erosion, reduces misfires, and provides improved durability*, leading to longer service life. It provides superior performance over copper and platinum plugs primarily used in distributorless ignition system (DIS) engines.
Suggested Purchase Quantity: 8
- Most jobs typically require 8 of this item.
This item must be purchased in quantities of 4

This Part Fits the Following OEM/Substitute Numbers:

19158031, 41-905, 88901029, CR45TS, R45TS

Additional Fitment Information:

Vehicle	Block	CC	Engine	CID
1978 - Mercury Monarch	V	-	8 Cyl 5.0L	302

6 In Stock

Limited-Time Offer

$9.65 USD

$11.58 USD


Brand	Autolite
Part #	A77APP26
Condition	New
Warehouse	B

UPC: 009100260062

1978 Mercury Bobcat Spark Plug 6 Cyl 2.8L Autolite

Autolite XP105 Iridium XP Spark Plug
Replaces Original Half Thread Design
Iridium XP Spark Plug
Product Attributes:
- Center Electrode Projection: Mid Projection
- Center Electrode Design: Fine Wire
- Center Electrode Insulator Tip Projection:
  - 0.133
  - 3.38
- Seat Type: Tapered
- Washer Included: No
- Electrical Terminal Type: Non-removable Nut
- Ground Electrode Quantity: 1
- Grade Type: Performance
- Core Nose Length:
  - 0.65
  - 16.51
- Ground Electrode Tip Material: Platinum
- Center Electrode Core Material: Copper
- Hex Type: Hex
- Resistor Type: Yes
- Insulator Material: Ceramic
- Indexed: No
- Hex Size: 5/8
- Reach:
  - 0.679
  - 17.25
- Center Electrode Tip Material: Iridium
- Ground Electrode Tip Design: Taper Cut
- Pre-Gap Size:
  - 0.044
  - 1.12
- Resistance: 4000
- Insulator Height:
  - 2.026
  - 51.46
Features:
- Engineered with an Iridium-enhanced center electrode and fine-wire design that increases ignitability and provides a more focused ignition for improved engine performance.
- Its proprietary platinum ground electrode provides increased durability* and resistance to wear, extending the life of the plug.
- The tapered ground wire improves engine ignitability.
- Its high alumina multi-rib ceramic insulator provides thermal conductivity and superior insulation for increased strength while preventing flash-over.
- Designed with a nickel-plated shell that is corrosion resistant to provide increased durability for extended periods.
- Includes a lifetime limited warranty that guarantees optimum performance equal to OE designed plugs.
Autolite® Iridium XP spark plugs are engineered with an iridium-enhanced fine-wire and a proprietary, platinum ground electrode, to increase durability*, while its tapered ground wire maximizes engine efficiency, delivering improved engine performance, fuel efficiency, acceleration, and ignitability.
Suggested Purchase Quantity: 6
- Most jobs typically require 6 of this item.
This item must be purchased in quantities of 4

This Part Fits the Following OEM/Substitute Numbers:

1465, 2408, 41-963, IZTR5B-11, IZTR5B11

Additional Fitment Information:

Vehicle	Block	CC	Engine	CID
1978 - Mercury Bobcat	V	-	6 Cyl 2.8L	171

4 In Stock

Limited-Time Offer

$11.42 USD

$13.70 USD


Brand	Autolite
Part #	A77XP105
Condition	New
Warehouse	B

UPC: 009100044266

1978 Mercury Zephyr Spark Plug 4 Cyl 2.3L Autolite

Autolite XP105 Iridium XP Spark Plug
Gap .034 (in)
Iridium XP Spark Plug
Product Attributes:
- Center Electrode Projection: Mid Projection
- Center Electrode Design: Fine Wire
- Center Electrode Insulator Tip Projection:
  - 0.133
  - 3.38
- Seat Type: Tapered
- Washer Included: No
- Electrical Terminal Type: Non-removable Nut
- Ground Electrode Quantity: 1
- Grade Type: Performance
- Core Nose Length:
  - 0.65
  - 16.51
- Ground Electrode Tip Material: Platinum
- Center Electrode Core Material: Copper
- Hex Type: Hex
- Resistor Type: Yes
- Insulator Material: Ceramic
- Indexed: No
- Hex Size: 5/8
- Reach:
  - 0.679
  - 17.25
- Center Electrode Tip Material: Iridium
- Ground Electrode Tip Design: Taper Cut
- Pre-Gap Size:
  - 0.044
  - 1.12
- Resistance: 4000
- Insulator Height:
  - 2.026
  - 51.46
Features:
- Engineered with an Iridium-enhanced center electrode and fine-wire design that increases ignitability and provides a more focused ignition for improved engine performance.
- Its proprietary platinum ground electrode provides increased durability* and resistance to wear, extending the life of the plug.
- The tapered ground wire improves engine ignitability.
- Its high alumina multi-rib ceramic insulator provides thermal conductivity and superior insulation for increased strength while preventing flash-over.
- Designed with a nickel-plated shell that is corrosion resistant to provide increased durability for extended periods.
- Includes a lifetime limited warranty that guarantees optimum performance equal to OE designed plugs.
Autolite® Iridium XP spark plugs are engineered with an iridium-enhanced fine-wire and a proprietary, platinum ground electrode, to increase durability*, while its tapered ground wire maximizes engine efficiency, delivering improved engine performance, fuel efficiency, acceleration, and ignitability.
Suggested Purchase Quantity: 6
- Most jobs typically require 6 of this item.
This item must be purchased in quantities of 4

Additional Fitment Information:

Vehicle	Block	CC	Engine	CID
1978 - Mercury Zephyr	L	-	4 Cyl 2.3L	140

4 In Stock

Limited-Time Offer

$11.42 USD

$13.70 USD


Brand	Autolite
Part #	A77XP105
Condition	New
Warehouse	B

UPC: 009100044266

1978 Mercury Zephyr Spark Plug 4 Cyl 2.3L Autolite

Autolite XP105 Iridium XP Spark Plug
Replaces Original Half Thread Design
Iridium XP Spark Plug
Product Attributes:
- Center Electrode Projection: Mid Projection
- Center Electrode Design: Fine Wire
- Center Electrode Insulator Tip Projection:
  - 0.133
  - 3.38
- Seat Type: Tapered
- Washer Included: No
- Electrical Terminal Type: Non-removable Nut
- Ground Electrode Quantity: 1
- Grade Type: Performance
- Core Nose Length:
  - 0.65
  - 16.51
- Ground Electrode Tip Material: Platinum
- Center Electrode Core Material: Copper
- Hex Type: Hex
- Resistor Type: Yes
- Insulator Material: Ceramic
- Indexed: No
- Hex Size: 5/8
- Reach:
  - 0.679
  - 17.25
- Center Electrode Tip Material: Iridium
- Ground Electrode Tip Design: Taper Cut
- Pre-Gap Size:
  - 0.044
  - 1.12
- Resistance: 4000
- Insulator Height:
  - 2.026
  - 51.46
Features:
- Engineered with an Iridium-enhanced center electrode and fine-wire design that increases ignitability and provides a more focused ignition for improved engine performance.
- Its proprietary platinum ground electrode provides increased durability* and resistance to wear, extending the life of the plug.
- The tapered ground wire improves engine ignitability.
- Its high alumina multi-rib ceramic insulator provides thermal conductivity and superior insulation for increased strength while preventing flash-over.
- Designed with a nickel-plated shell that is corrosion resistant to provide increased durability for extended periods.
- Includes a lifetime limited warranty that guarantees optimum performance equal to OE designed plugs.
Autolite® Iridium XP spark plugs are engineered with an iridium-enhanced fine-wire and a proprietary, platinum ground electrode, to increase durability*, while its tapered ground wire maximizes engine efficiency, delivering improved engine performance, fuel efficiency, acceleration, and ignitability.
Suggested Purchase Quantity: 6
- Most jobs typically require 6 of this item.
This item must be purchased in quantities of 4