O.K. this model has the blade engagement that is also the deck height adjustment lever.(pull it all the way up to disengage)
When I bought it everything was as it should be. Then I took the deck off my ranch-king. After I put it back on I cannot start the engine with the belt on the pulley. If I take the belt off the pulley I can start it and drive it, but obviously my grass won’t get any shorter! I have fiddled with it a bit to no avail. PLEASE HELP ME.

I own a few MTD tractors – I like the tractor, just hate the deck setups. Id suggest removing the deck again and start over. It mightve been a good idea to take pics before removing it the first time- but its too late.
Okay, my White LT12 is similar ( still an MTD product) – it has 4 ‘legs’ that come down, with a 5th ‘adjustment leg’ and a plate in the back along with a seriously heavy duty spring. Everytime ive removed the deck- i have a serious time trying to put the dang spring back on – it hooks waaay back at the rear axle.
Deck is out from under the tractor, lower the engagement/lift arm all the way down- check for any binding in these arms- they tend to ‘stick’ alot. I suggest greasing the moving points and the plate assembly tward the rear.
Make sure the belt is run the correct way , thru pulleys, idlers, ect.
I jack up the front of the tractor ( since the arms hang so low) – then slide the deck back under. Hook up all the pins and lower back down, attach the plate/spring and lift the arm to off position, try cycling the lift assembly to make sure nothing binds.
It should work now. I had a few times where the arms would bind or twist and screw up the deck hieght/engagement.
Kidd

Okay, so for part of my birthday I would like to go horseback riding.

I’m just wondering, is it possible for me just to go and make an appointment and go horseback riding for a few hours and then never go back there again? Or do I have to go into like an academy that teaches you how to ride the horses and stuff, or something? Also, do they have like private "appointments"? lol. Like, there’s and just me and my family, and he teaches us how to ride them..

I might sound stupid, but I’m just a little confused.

At my riding school, they run special birthday parties for people who have never ridden before.
They teach basic horse management, where you get to groom, lead and tack up, then have a lesson on the junge, using a vaulting saddle, which helps you gain confidence.
That might be a little boring if you are more into just riding instead of learning everything slowly, but most people seem to enjoy it. A local riding school may operate something similar.
I really don’t think there is a riding school in the world that would let a new rider just hop on their horses with no experience. They usually start you on the lunge, in a one-on-one lesson.
You never know, you might like it and decide to go back for lessons. But in saying that, you have no obligation to return.
Happy B-day.