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MDI Champion 300 Spark Plug N9Yc 4/Pk P14353679MDI-300 https://cdnimages.opentip.com/full/MDI/MDI-300.jpg Champion 300 Spark Plug N9Yc 4/Pk Manufacturer Part Number: 300SPARK PLUG N9YC (300)Champion 300 Original Equipment Style Copper Plus Spark Plug (4/Vehicle) Champion Copper Plus spark plug technology began as an automotive OE plug, and today is widely used in a variety of power equipment applications. The nickel alloy center and ground electrode provide good wear characteristics and the extrusion of copper into the center electrode allows for an increase in conductivity and heat control. Champion Copper Plus spark plugs are a great choice for OE-replacement on older automotive engines, lawn and garden applications and similar engines. 13/16\" hex size, 14mm thread diameter. 14353679 037551000067 0.1500lbs 0.00 0.00 0.00
100.1400 2027-07-09 Discontinued
customer review - by , November 11, 2025
5/ 5stars
Works fine
customer review - by , October 10, 2025
5/ 5stars
1973 2002Tii, car runs best on non resistor copper core plugs. These are the ones since NGK stopped making them. Works great, better than NGK, burn is cleaner.
customer review - by , March 3, 2025
5/ 5stars
good plug
customer review - by , June 6, 2024
5/ 5stars
4 spare spark plugs for my backup generator. Better than half the price of the same item locally. Bought the 4 pack and gave two to a friend, so he can have extra plugs for his generator. Brand name with solid reputation. Exact fit for the generators, always good to have one on hand in case it becomes fouled and the endgame won't start. Quick fix if you have one on hand. The key to dealing with any emergency is preparedness.
customer review - by , May 5, 2024
5/ 5stars
Spark plugs are OEM nd of course work for replacement
customer review - by , March 3, 2024
5/ 5stars
Not much to say, they work!
customer review - by , December 12, 2022
5/ 5stars
I was skeptical as it didnt say Champion on it even though it was in a Champion package. But installed and it works.So lets hope it lasts.
customer review - by , November 11, 2022
5/ 5stars
I have been using Champion products for a life, and I never had problems.
customer review - by , November 11, 2022
5/ 5stars
Works great on Farmall Cub
customer review - by , September 9, 2022
5/ 5stars
Never gone wrong using this plug

Champion 300 Spark Plug N9Yc (4/Pk)

stars Rating 5 | 15 reviews
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UPC: 037551000067
SKU: MDI-300
Price: $100.14
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Quantity:
Discontinued
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Product Description

Manufacturer Part Number: 300

SPARK PLUG N9YC (300)

Champion 300 Original Equipment Style Copper Plus Spark Plug (4/Vehicle) Champion Copper Plus spark plug technology began as an automotive OE plug, and today is widely used in a variety of power equipment applications. The nickel alloy center and ground electrode provide good wear characteristics and the extrusion of copper into the center electrode allows for an increase in conductivity and heat control. Champion Copper Plus spark plugs are a great choice for OE-replacement on older automotive engines, lawn and garden applications and similar engines. 13/16" hex size, 14mm thread diameter.

warning tips WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.
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Customer Reviews
5 stars
15
4 stars
0
3 stars
0
2 stars
0
1 stars
0
By ron dellinger
Date: November 12, 2025
Works fine
Rating: 5 stars [5 of 5 Stars!]
By Brian T. Ach
Date: October 09, 2025
1973 2002Tii, car runs best on non resistor copper core plugs. These are the ones since NGK stopped making them. Works great, better than NGK, burn is cleaner.
Rating: 5 stars [5 of 5 Stars!]
By Willie R Williams
Date: March 25, 2025
good plug
Rating: 5 stars [5 of 5 Stars!]
By Larry
Date: June 10, 2024
4 spare spark plugs for my backup generator. Better than half the price of the same item locally. Bought the 4 pack and gave two to a friend, so he can have extra plugs for his generator. Brand name with solid reputation. Exact fit for the generators, always good to have one on hand in case it becomes fouled and the endgame won't start. Quick fix if you have one on hand. The key to dealing with any emergency is preparedness.
Rating: 5 stars [5 of 5 Stars!]
By Yankee Traveler
Date: May 24, 2024
Spark plugs are OEM nd of course work for replacement
Rating: 5 stars [5 of 5 Stars!]
By Glockman
Date: March 23, 2024
Not much to say, they work!
Rating: 5 stars [5 of 5 Stars!]
Items 1 - 6 of 15 reviews
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