I would be so grateful if someone could give me an idea on this :-
Mountfield 1430 ride on had a problem for a long time with difficult to start when hot but always ran fine.
Now trying to start from cold spits back from carb backfires from exhaust will eventually start very rough and can increase revs but as soon as cutter engaged backfires and stops.
Tried :-
Brand new carb
New fuel
New plug
Checked on air leaks on intake
Checked valves aren't stuck and are operating
Checked fuel filter clean
Checked compression

Could it be a timing issue but I thought timing was fixed on these electronic systems.
Really stuck and any help greatly appreciated thanks


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