Quicksilver NGK BU8H Spark Plug 13686Q
- Brand:
- Quicksilver
- Part no:
- 13686Q
Image: Powerboat Supply
Where to buy
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Quicksilver 13686Q is an NGK BU8H spark plug carried under the Mercury and Quicksilver name. It is a semi-surface gap plug with a small side electrode, so it is pre-gapped and needs no gap adjustment, and it is described as nearly immune to pre-ignition. The insulator is pure alumina silicate ceramic for strength, and a triple seal helps prevent leakage. Fit the plug named in your engine's owner's manual.
Our take
The BU8H's small side electrode needs no gap adjustment, so the plug goes in as supplied instead of being set with a gauge. Its triple seal is there to help prevent leakage at the plug.