- Oct 4, 2006
- 2,335
- Boat Info
- 2003 280DA and 1995 Sea Ray 175
- Engines
- Twin 4.3l and 3.0l, all w/ AlphaI GenII drives
I am using the AC 41-993 Iridium Plugs as well. 41-993 is the recommended plug at least for the V8s. I honestly don't see any reason not to use the Merc recommended plug.
I used the same 41-993 iridium plugs on my V6's last year. Not too pricey at AutoZone.