If it is a two speed, on your left hand control there is two bottons, push the one on the left for Hi speed but you must sellect before you start moving ,to go back to low you must stop again and hit the same botton , if you dont stop there is going to be a big bang ,witch I dont think is good for the machine ,on my owners manual it specified this ,and when you get it on hi gear you are going to see a very fast skisteer ,2700 hrs sounds hi but I think you can get 3 to 4 times that many hrs with proper maintenance and good opperators manners these engines are very reliable and can give you a very long lasting life, we have used them on boats for a long time and so far most people that I know are happy with em, my 2109 has the perkins and I have not need to used full throttle yet and dont think I'll ever justified more than half on anything ,The way I run mine looks like it burns just under two gallons per hr ,that is spreading and grading fill dirt and loading trucks .