Hi Blumbly,

Some progress on this one. I replaced the diaphragm cap and the diaphragm itself and got it running today. It was still backfiring every 30 seconds or so. Thought I might try to mow the lawn with it. Got 1 metre and it died. Since then I cannot get it to start again. I have lost spark again.

I'm thinking the coil was the reason for the backfiring and now it has possibly gone the way of the dodo. Just wish I had another coil to test it with now.

OR do you think I may have another problem? I used a new spark plug tester and also tried the plug against the body of the mower to test for spark and nothing frown

Thanks,
Pete