Yes the crankshaft fitted to the 219907-3026-G5 engine has the same dimensions. (crankshaft part no.: 591593)
The 2016 Briggs & Stratton Repower Engine Specifications guide now only shows a 10.5 & 11.5 HP 21 cubic inch engine. The next model up is the 31 cubic inch 17.5 HP.
See further the link below (page 15 onwards):
2016 Briggs & Stratton Repower Engine Specifications GuideAlso, have you had a look at why the current engine has lost compression? It may be as simple as a failed head gasket or a sticking valve.
