Re: Ringing question
Wiseco rings only fit Wiseco pistons, the Sierra will interchange if they have it in your serial number range. The 2.5 came with 2 different sizes rings, a 1.5mm and a 2mm thick so order by your serial number. The only ones supplied by Sierra is the 2 mm ring and Promarine is cheaper and has them (1.5 & 2MM) instock.
39-815515A12 --PISTON RING (STD.) (1-1/2 MM)XR6/MAGNUM III/175/200/TRACKER SN# 0G052594 & Below
39-822321A12 --RING KIT (STD.) (2MM)XR6/MAGNUM III/175/200/TRACKER SN# 0G052595 & Up
I'm rebuilding a 1996 200hp merc, bored two cyl. My question is ; will wisco or sierra std rings work on oem std pistons ???
