The Ford Barn - View Single Post

KiWinUS · 10-04-2021, 02:28 PM

Merc 4inch stroke crank does NOT need welded to get 4 1/8 inch stroke. It gets offset ground to the small 2 inch pin size. Hence the use of the 21A or 91A rods.

10-04-2021, 02:28 PM	#5
KiWinUS Senior Member Join Date: May 2010 Location: Charlotte NC KiWi-L100 available here Posts: 2,963	Re: 3/8x3/8 jahns pistons? Merc 4inch stroke crank does NOT need welded to get 4 1/8 inch stroke. It gets offset ground to the small 2 inch pin size. Hence the use of the 21A or 91A rods.