Re: Briggs and Stratton problems 550EX O9P702-0127-H5
Well this is proving a mighty challenge.
I had already cleaned the tank and lines, replaced the spark plug and oil, replaced the carby and air filter, both with genuine B & S one, cleaned all around the engine and sourced some fuel from another petrol station.
I have only ever used genuine Briggs and Stratton parts as well as quality SAE 30 (recommended) oil.
I had been advised to install a small fuel filter in between the tank and the carby but have read where that in itself can cause flow problems.
Immediately on starting as I've indicated, the mower started first pull and I allowed it to warm up, restarted it and then garaged the mower
The next morning the mower started but immediately misfired and wouldn't rev and started blowing black smoke.
This isn't the first time this has happened but to a much lesser degree.
I then joined this forum.
I hadn't done anything else to the mower and was astonished it again started first pull yesterday and ran perfectly for an hour allowing me to mow my son's yard.
During the mow I stopped and started the mower several times without any problem and always started first pull.
I observed the auto choke was behaving properly and presumably so was the governor mechanism.
There's only one thing left, the magneto, which I have purchased (genuine Briggs and Stratton) and am awaiting it's arrival to swap on the mower.
I will also check the valve clearances, the auto choke operation and anything else I can think off
I really appreciate the advice from this column.
