HI all

.. just got a Scott Bonner model 45 with a B&S 2.5hp mtr today and was hoping to find a manual so I can get a good understanding of it. If it is the right place I have a couple of questions someone may know the answers to:
a) When I increase the revs with the blades in the neutral position they engage - is that OK
b) Is it OK to "ride" the clutch as when it is left fully out it runs away from me
c) how serious is a crack under the motor mount as I noticed this tonight ?

Sorry if this is the wrong place to ask... Cheers Garry