Having problems starting the petrol engine on your lawnmower? The video below provides a basic guide to resolving starting issues on small petrol engines.
The video has been put together by the on-line parts store eSpares.
The machine they use for the demonstration is a Qualcast Classic Petrol 35s cylinder lawnmower, however most of what they tell you will apply to other makes and to rotary lawnmowers as well as cylinder lawnmowers.
Looking at the comments posted on YouTube for this video one person is advising against using compressed air on a carburetor.