Ok so a slight digression from this is something that happened today. A couple of blokes brought over a Chonda for me to look at, it had oil spots all over the front of it. It obviously had not done much work. I checked the oil several times and it sort of showed half way up the dipstick but it was a bit hard to tell. I decided I had to drain it and put the correct amount of oil in it. Draining the oil it was obvious it was mostly petrol. Asking about it the mower had been borrowed by a couple of friends. Question is did one of the friends put petrol in the oil or did the float needle fail and dump the petrol in the sump?. If the float needle did fail it is the 3rd Chonda/Honda float needle that has failed recently on me in the last couple of weeks