Anyone happen to know the length, pitch and width of the engine mounting bolts? Broke mine.

 

3/8"-16, 1.00-1.25" UHL.

When you torque the screws, check for underhead clearance with the smallest leaf gage you have. If you feel any at all, back the screw out and add a couple of flat washers.

It's a known bug that sometimes the engine mount bracket screw holes aren't drilled & tapped deeply enough, and the screw ends up bottoming out. Since there isn't tensile preload where the screw needs it, it breaks! Ouch... Two flat washers is a better fix than one (or one heavy flat washer will also work.)

Consider the use of LocTite #242 (or equivalent) to be mandatory here. Torque specs should be on my site, in the Tech section.