Fettled the lawnmower into it's first cut of the season. Top up of oil, prime, not even a hint of a splutter into life. Prime, pull, prime, pull, prime, pull, prime, pull, prime, pull, prime, pull, prime, pull. Hmm.
Spark plug gap OK
A bit of fresh unleaded and voila!
Didn't take it all the way down, just enought to dry out down to the floor, and then will have another go when I get back from Gatwick.
In bike fettling, finally found and solved the mudguard rub that has been plaguing me. Now I can hear a chain rattle/rub I didn't know existed.