grasshopper 614

Hello. I am new here , first post.
I got a GH 614 with a 48 in deck. I traded a shotgun for it. However the engine seems a bit sluggish. It is equipped with a 14 hp vanguard. I have never owned a grasshopper. Any tips and advise would be helpful.
Thanks Jay

https://www.google.com/webhp?source...spv=2&ie=UTF-8#q=grasshopper+614+mower+manual Post engine numbers:
model xxxxxx, type xxxx, trim xx. You may have to remove blower housing, top of engine cover, to locate numbers.