F FATDAD3 New Member May 31, 2019 #1 I JUST GPOT A CHALLENDER 1800 WITH THE MERCURY V6 2STROKE , WHATS THE BEST SPSRK PLUG ???? PER THE SERIAL NUMBER IT CALLS FOR A SURFACE GAP OR A FLAT BOTTOM SPARK PLUG BUT WHATS THE DIFFERENCE ??
I JUST GPOT A CHALLENDER 1800 WITH THE MERCURY V6 2STROKE , WHATS THE BEST SPSRK PLUG ???? PER THE SERIAL NUMBER IT CALLS FOR A SURFACE GAP OR A FLAT BOTTOM SPARK PLUG BUT WHATS THE DIFFERENCE ??
