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|This product doesnt fit any of your saved vehicles||Check Fit for another vehicle|
|Center Electrode Core Material:||Copper Core|
|Center Electrode Tip Material:||Nickel|
|Electrode Core Material:||nickel|
|Electrode Tip Material:||nickel|
|Gap Size:||0.044 in|
|Ground Electrode Core Material:||Nickel Core|
|Ground Electrode Quantity:||1|
|Ground Electrode Tip Design:||Standard|
|Ground Strap Quantity:||1|
|Hex Size:||13/16 in|
|Manufacturer Heat Range:||6|
|Shorty Spark Plug:||No|
|Spark Plug Approximate Resistor Value:||5K Ohm|
|Thread Diameter:||14 mm|
|Wrench Diameter:||13/16 in|
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Q:I have a boat with a Mercruiser 5.0 L GM305. They call for NGK BPR6EFS. What is the difference between the NGK BR6ES-11 and the NGK BPR6EFS. The web sight refer's me to NGK BR6ES-11
A:I'm happy to help, Dave! Both of the spark plugs are copper core, resistor plugs with nickel center and ground electrodes. Both center electrodes are 2.5mm. NGK Part No. BPR6EFS (Part No. 3623) has a thread size of 14mm, a hex size of 5/8" (16mm) ,a reach of 17.55mm (.691"), a tapered seat, gap of .032" (0.8mm), a heat range of 6, a removable nut terminal, a thread pitch of 1.25mm and is projected.