Spark Plugs for 8.1L

mawyatt

New Member
Dec 13, 2007
1,001
Clearwater, Fl
Boat Info
2008 Sundancer 38DA
Engines
8.1L Mercruisers
My stb engine is running a little rough and service tek said this is common and I need to replace plugs. He said it's not too difficult to do yourself.

I did a search and came up with "My Manual says 0.060 in. (1.52mm) for Denso TJ14R-P15 Plugs" for the plugs.

What plugs are popular with 8.1L that you can get locally (Wal Mart, One Stop or NAPA), any advice on changing plugs like special tools needed?

Thanks and Happy Memorial Day
 
Changed mine out earlier this year. Went with AC Delco 41-983 plugs. Both NAPA and O'Reilly's had them in stock for less than $6.00. Pick up a tube of Anti-Seize for the threads on the plugs. Also some dielectric grease and squirt a little dab into the end of the plug wires before reattaching. Other than a ratchet and several extensions (3", 6"), no special tools needed.
WJ
 

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