Is this the equavilent of a champion rcj6y ?

Yes, according to the cross reference.

does it fit poulan pp4018 40cc chainsaw

NGK has multiple grades of plugs that may fit your engine so it is always recommended to go to the NGK site at https://ngksparkplugs.com/en/part-finder to verify applications. This site will show you all of the available plugs to fit your engine and will also show you which grade plug is recommended for the best performance of your specific engine.

Is this equivalent to a champion dj7y

It does not appear to be so: https://www.sparkplug-crossreference.com/convert/CHAMP_PN/DJ7Y For fitment data on NGK spark plugs, their website can be found here: https://ngksparkplugs.com/en/part-finder

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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(6703) BPMR7A Spark Plugs Individual Boxed - 2 Pack, Copper | Replaces 7545 7547 7813 WS7F WSR5F WSR6F WSR6F/R10 852 CJ6Y 852-1 852EZ 858-1 RCJ6Y 852ECO. 20k-30k mileage rated.

Product ID: 123668863

Details

Brand
NGK
Core Material
Copper
Thread Size
14mm
Top Material Type
Metal
Vehicle Service Type
Car Truck

⚡Consistent ignition power

🛠️Direct OE replacement fit

🛡️Corrosion-resistant plating

S$17

Duties & taxes included

In stock

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Description

⚡ Ignite your drive with NGK – where precision meets power!

ADVANCED COPPER CORE - Optimized electrode design enhances spark efficiency and durability.
PRECISION OEM QUALITY - Engineered to meet exact manufacturer specs for flawless fit and function.
FUEL EFFICIENCY BOOSTER - Improves combustion for cleaner burns and better mileage—drive smarter, not harder.
CORROSION RESISTANT FINISH - Trivalent metal plating ensures long-lasting protection and easy maintenance.
RELIABLE IGNITION PERFORMANCE - Delivers smooth starts and consistent combustion for everyday driving confidence.

NGK 6703 BPMR7A spark plugs are premium copper-core ignition components designed for reliable starts, smooth engine operation, and enhanced fuel efficiency. Manufactured to OEM standards with corrosion-resistant plating and advanced electrode technology, these plugs ensure consistent performance and durability for cars and trucks alike.

Specifications

ASIN	B07R1QX2ZN
Automotive Fit Type	Vehicle Specific Fit
Best Sellers Rank	#1,750 in Automotive ( See Top 100 in Automotive ) #4 in Automotive Replacement Spark Plugs
Brand Name	NGK
Compatible with Vehicle Type	Car, Truck
Core Material	Copper
Customer Reviews	4.8 4.8 out of 5 stars (2,492)
Gap Size	0.03 inches
Included Components	Two 6703 NGK Spark Plugs
Item Weight	2.4 ounces
Manufacturer	NGK SPARK PLUG CO
Manufacturer Part Number	BPMR7A
Manufacturer Warranty Description	Includes manufacturer provided warranty
Model Number	6703
Number of Items	2
OEM Equivalent Part Number	BPMR7A
Thread Size	14mm
Top Material Type	Metal
UPC	682863346244
Unit Count	2 Count

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