Best current price£3.70from The Green Spark Plug Company
Shopping.co.uk recommended and popular offers
The Green Spark Plug Company£3.70Visit shop Ngk Bpr8es 3923 Spark Plug Copper Core New Ngk-Bpr8es
Visit shop14 offers from £3.70 - £12.49
View price history by clicking the chart icon.
The NGK BPR8ES 3923 Spark Plug is an essential maintenance component designed for automotive enthusiasts and owners of compatible powersports equipment like the 1999-2001 Polaris 700 SLH. It delivers reliable ignition through its engineered projected centre electrode, which enhances combustion efficiency and ensures smooth engine operation. While this plug provides excellent durability, users must strictly verify vehicle engine compatibility and ensure the pre-set gap aligns with their specific manufacturer's service manual requirements to avoid performance issues.
| Model Part Number | BPR8ES |
|---|---|
| Brand | NGK |
The NGK BPR8ES comes with a pre-set gap of 0.028.
This plug is specifically listed as compatible with 1999-2001 Polaris 700 SLH models. Always consult your owner's manual for the correct heat range and plug type before installation.
In NGK nomenclature, 'B' indicates the thread diameter, 'P' indicates a projected insulator type, and 'R' denotes a resistor-type plug for noise suppression.
Replacement intervals depend on engine usage, but it is generally recommended to inspect them every season and replace them if you notice performance degradation or wear on the electrode.
While it is a high-quality standard plug, engines with significant modifications or forced induction may require a different heat range or a specialty material like iridium. Consult your engine tuner.
Overtightening can damage the threads in the cylinder head or cause the spark plug to snap during future removal, leading to costly engine repairs.
Check the ignition lead connection to ensure it is firmly seated and confirm the plug gap matches your engine manual's specifications.
Remove the plug to inspect for carbon fouling or moisture; if fouled, clean the area and verify your air-fuel mixture settings.
Stop immediately, remove the plug, and check for thread damage in the cylinder head; always start threading by hand to avoid cross-threading.
Before installation, verify the compatibility of the BPR8ES (Stock Number 3923) with your specific engine serial number or model year. Always use a spark plug socket to avoid damaging the ceramic insulator. Thread the plug by hand for the first few turns to prevent cross-threading, then use a torque wrench to reach the manufacturer-specified torque setting—never overtighten. Periodically inspect the electrode tip for signs of fouling (black, oily, or white deposits), which can indicate underlying carburetor or timing issues that may need professional attention.
