NGK Standard Spark BPR6EFS Plugs Review

Based on my observations, THESE ignition parts have failed to provide a consistent spark, resulting in poor engine performance. While they may be affordable the potential cost of damage to other components outweighs any savings.the only benefit is their availability at most auto parts stores. Stick to reputable brands in the future..

Installed these on my Mercrusier 3.0 to replace my old Delco AC plugs that were only a few weeks old and I can tell the engine runs smoother. The engine always had small bumps every 60 seconds, and after installation, the engine went smoothly from idling to running. Double check gap 2 is slightly offset, but should always be done when changing spark plugs.