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What is the difference between an NGK BPR-6ES spark plug and a NGK BP-6ES spark plug? Answered

I need to replace a spark plug that is a NGK BPR_6ES and the only replacement i have is a NGK BP-6ES.Will it be suitable for a small honda motor on a davey pump.


Can you tell me why the replacement plug I got for a push mower is a BPR-6ES when the original spark plug is a BPR-5ES? Are they by any chance interchangeable?

Thanks much.

Structurally they are the same the only difference is the BPR 6ES has an internal resistor.
The BP 6ES should work better then the BPR 6ES on a small engine.