i have a engine, make unknown. it a single cylinder petrol oil mix,
its not very old, couple of years, when its started from cold or hot, it runs fine for about 5 to 10 mins, then it runs as though there is a petrol blockage in the carb and i have to adjust the choke to keep it running, until i have the choke most of the way on, then after a few minutes it will splutter more and cut out,
the carb is clean, petrol flow is great.
spark is fine.
i have thought of mixture, and is it possible to be a loose head? thus allowing the gasket to blow a bit as it wars up?
these items seem to suffer from this problem after the first year or so. .. its on a lawnmower and i have read some reviews on them and lots of people have had the same problem,, / / / /