Depends on engine. Some have air vane governors which depend on airflow generated by flywheel fins. This type is found directly under blower housing. Others are mechanical and are internal. These run off of crankshaft gear train.
Chances are your 3.5 has an air vane. Much easier to get to than the mechanical type.
See attached:
No instructional pics.
Just look at it carefully to see how it operates.
Usually a linkage rod runs from governor blade to carb butterfly.
This rod can be disconnected, then your throttle cable can be connected directly to butterfly. This effectively renders governor useless.