I have an old Mountfield Empress mower here with a 3.5hp Briggs & Stratton
4-stroke engine.The problem is that it will not start when the weather is cool to cold (i.e. now).
In spring and summer it is fine, although leaving it out in the sunshine for half an hour before starting it definitely helps.
Once it is running it is fine.
Have done all the usual things, plug, air filter, even stripped and cleaned the carb, but no change.
Tried warming up the cylinder head with a 3kW fan heater but this didn't seem to help, so maybe it's to do with the temperature of the air being pulled into the engine.
Any ideas please?