Spark plug confusion and block drain plugs

lonewolf41

Petty Officer 2nd Class
Joined
Jun 28, 2013
Messages
143
My 5.0 OSi-E came with Autolite APP605 spark plugs. Based on the poor job done on the rest of the motor, I decided to see if those were the right plugs. I could not find any reference to those plugs. As far as I can tell, the volvopentastore site calls for Volvo spark plug # 21467472 which (from various multiple sources) is the same as AC-Delco 41-101. My manual says to use Denso TJ14R-P15, but that is the only place I see that plug listed. Anyone else use the Denso plugs?

Also, my older boat (still a volvo) used Sierra 18-4226 - Mercury Drain Plug for the block drains. I really liked them. I would like to install them in the new boat. Does anyone know the mating part that they screw into that screws into the block?

TIA,
-Keith
 
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