Rick: I am not a 4 cyl expert but timing is the same as a equivalent Mercury engine. The pulley on top of the mag has a mark & the pulley on the crank also has one. You must perfectly align these two marks & then slip the timing belt over these two pulleys starting on the motor side first. Also I use 1963 Chev "Willow Green" on my 2 cyl WM7's & it is a very close match & actually is prettier as it has some mettalic in it whereas the original paint was a solid color. Hope that fhelps.