My Victa 4012TX's engine, a 12.5 horse Briggs is being a pain.
It runs fine at low to medium revs but really rough at high revs.
It sometimes backfires when I shut it down.
I've cleaned the carby with "carby cleaner", replaced the fuel filter (with a bigger one) and fuel lines but no matter how I adjust the mixture I can't get it to run properly at working revs.
It will potter about the yard beautifully but not under load or quickly.
Should I be looking at electrics? Points or condenser perhaps.
Any help will be appreciated.
Best regards.
Rob.
