NGK BR9HS-10 Spark Plug, Mercury 813418
- Brand:
- NGK
- Part no:
- 813418
Image: Powerboat Supply
Where to buy
View on Amazonpaid link
This is the NGK BR9HS-10 spark plug supplied as Mercury and Quicksilver part 813418, a genuine new Mercury Marine part. Mercury has renumbered it: the older numbers 8M0114742, 97186B, 97186 and 86864 are replaced by 813418. No electrode, gap or thread details are stated, so confirm fit by engine serial number.
Our take
The replacement history is the useful detail: 813418 supersedes 8M0114742, 97186B, 97186 and 86864, so an old manual number can be traced to this NGK BR9HS-10 plug. No gap or thread details are stated.