My Toro Lawnmower with GCV160 Honda engine had its 5 years warranty expiring 10 days ago. It starts at the first pull, but just today it decided to rev up and down with a period of about 1 sec, so I do not know if this qualify as "hunting" which has been described as having a period of 5 seconds. Here is a youtube video I uploaded showing the sound it makes:
Sometimes after 25 seconds or so the issue disappears, only to return after having used the mower for 5 or so minutes, but most of the time it does not go away after 25 seconds and it just keeps doing it, unless I start fiddling with the governor arm and I make it increase the motor speed while holding the governor steady, once I don't feel the governor trying to move I let it go and the motor stays stable for few minutes.
This mower has not been used more than perhaps 120hrs in 5 years, I prepare it following Toro recommendations and store it indoors during the winter (Nov-April). The governor arm to carburetor linkage looks fine to me, I swapped the spark plug between my Snow-blower and the lawnmower (they are the same type) and the issue didn't move to the snow blower and the mower still behaves the same with the snow blower's spark plug. I have adjusted the ignition coil to flywheel gap to 0.016", it was 0.010" or so.
Should I follow the recommendations for "hunting"? Or is this something different?
