NGK 4004 spark plug for the 2006 Argo Conquest 6X6 617cc and other vehicles, a Standard-line plug that ignites the air-fuel mixture with a nickel alloy center electrode.
- NGK Standard line in the yellow box, engineered for OE applications with an actual OE or equivalent design
- Best for vehicles with OE nickel alloy plugs; not recommended on vehicles with factory precious metal plugs
- High grade alumina silicate ceramic makes a stronger insulator, and triple gasket sealing prevents combustion gas leakage
- Solid 98% pure copper core for heat dissipation, conductivity and ultra wide heat ranges
- Cold-rolled threads help prevent cross-threading and damage to cylinder heads
- Trivalent metal plating gives anti-corrosion and anti-seizing properties for easier installation and removal
Hard starting, a rough idle or a misfire can mean worn plugs, but a weak coil or a fuel problem can produce them too. With the engine off and cool, look at the old plug for a cracked insulator, rounded-off electrodes or oil fouling, and find the cause before you buy a new one.
It also fits the 2006 Argo Conquest 8X8 617cc, which takes one plug, as does the 2006 Argo Conquest 6X6 617cc.
Specifications
Fit and size
- Thread size: M14 - 1.25 (metric)
- Reach: 0.375 in (9.5 mm)
- Seat type: flat, with crush washer
- Heat range: 4
- Pre-gap: .028 in (0.7 mm)
- Insulator height: 1.50 in (38.0 mm)
- Center electrode insulator tip projection: 0.04 in (1.0 mm), non-projected
Build and materials
- Grade: Standard replacement
- Insulator material: ceramic
- Center electrode: copper core, nickel tip
- Ground electrode: one, nickel, J-gap
- Resistor type: yes, 10,000 ohm
- Terminal: non-removable nut
- Country of origin: Japan
In the box
The spark plug with its crush washer.
Interchange: BMR4A SOLID
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Does the NGK 4004 spark plug fit the 2006 Argo Conquest 8X8 617cc?
Yes. NGK 4004 fits the 2006 Argo Conquest 8X8 617cc and the 2006 Argo Conquest 6X6 617cc, with one plug for each.
Are NGK spark plugs from the Standard line okay on an engine that came with precious metal plugs?
No. NGK 4004 is best for vehicles with OE nickel alloy plugs and is not recommended on vehicles with factory precious metal plugs.
Is the 4004 one of the NGK r spark plugs with a resistor?
Yes. NGK 4004 is a resistor-type spark plug with a resistance of 10,000 ohm.
What thread size and reach does this spark plug have?
This plug has an M14 - 1.25 metric thread and a 0.375 in (9.5 mm) reach. It seats flat against the head with a crush washer.
Does this NGK spark plug come with a washer?
Yes. The washer is included and is a crush type, used with the plug's flat seat.
