I can't turn right. The left handle won't push forward. Happened last year and after 4 weeks just waiting in the shop they said something just needed tightened up - I don't know what. Something to do with linkage? I don't see anything loose and everything looks equal on both sides. The brake won't secure unless I pull back on the left handle to sit down in a groove and when I take the break off the mower spins briefly. Now it's going to be 3 weeks til someone can look at it - any ideas?