Mercury Quicksilver NGK IZFR6J Spark Plug 33-843220Q
- Brand:
- Mercury
- Part no:
- 843220Q
Where to buy
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This is the NGK IZFR6J spark plug, supplied under Mercury and Quicksilver number 33-843220Q. It uses a pure alumina silicate ceramic insulator for strength and heat transfer. The plugs arrive pre-gapped to the engine maker's specification, and they can be changed with ordinary spark plug sockets. Use only the plug your owner's manual lists.
Our take
The IZFR6J arrives pre-gapped to the engine maker's setting, so there is less to adjust before it goes in. Its ceramic insulator is aimed at strength and heat transfer, but confirm the plug against your owner's manual.