Welcome to TBN!!!
I expect you've got a blown seal and you'll probably have to pull the gearbox.
Do you have the manual? If not, determine the manufacturer (I think "Razor" is a model name, not the manufacturer) and see if you can download a manual.
SAFETY!! Block that cutter up so there is absolutely no way if can fall on you!! Even the lighter ones weigh around 600 lbs...maybe not enough to crush you, but it'll prevent you from being able to breath.