I have a 753L went to use blower for first time and it wont stay engaged unless I hold the thumb toggle on the right lever to the left, haven't used it in two years but if I recall the right trigger switch would lock the blower on, when I hit the right trigger the blower starts moving backwards very slowly, if I remember correctly the right toggle would also reverse the blower when toggle was moved to right, it does nothing when moved to right, I used it to blow snow by holding the right toggle on but that's kind of a pain when trying to turn and tilt auger my grapple bucket worked on it this fall, I had steam cleaned the machine earlier, was thinkin maybe got moisture in a connection, have had it in heated shed for couple of days and checked all connectors, any help would be appreciated,