I have a Murray 8HP about 19 years old. I find using it to be a lot of work. The drive activation lever is on the left and the impeller lever is right. (This model has the one-handed feature but that stopped working long ago. I figured I better include that info). Here's my question: I'm holding the levers down which effectively reduces the downward pressure on the scraper bar. So I end up lifting the handles with my arms to ensure good contact. It doesn't take too long before I'm just tuckered out from this combined pushing/lifting. What am I doing wrong? Can the levers be remounted so they pull up (that makes more sense to me)? Can I add weight to the front end to avoid the lifting? This is getting kind of tough on this old man.