You won't ever have to push that button the gr2120 always starts. I had one for 4 years - a 2012 model and now have a bx2370 with mower and loader. With your slopes if you don't need a loader stick with the GR 2120 , just awesome on the hills.
When I try to attach the wick release bucket
The tabs on the loader that slide into the bucket don't line up.
One is forward and one is back a few inches.
Makes it very hard to get bucket on.
Any ideas?