OK Spark plug is correct and gapped right, although Black.

I am thinking it's the flywheel key too.
Unfortunately it's not easy to get to, even to check.

It starts, must use full choke.
Then choke down one click, runs ok
After several seconds (5 or 10) revs up (seems high to me) then dies.
Fiddling with the choke can keep it running, but not always.
Mist, does smell gassy, coming out of the carb, why I think the flywheel key is off a bit.
Don't think it has a diaphragm, but does have parts that ethanol could affect.


WHY WOULD ANYONE IN 2005+ DESIGN AN ENGINE THAT HAS PROBLEMS WITH ETHANOL !!!!!!
Here in IL I don't think you can buy gas w/o it geesh.

I won't go into a full rant here.
B&S if this engine was deigned by US designers WE'RE DONE FOR.
If this engine was designed over seas, they are laughing at us, and you.

just for example, carb cover, two wing nuts to remove but it's tethered by the safety switch wires and the carb pump. Disconnecting the saftey switch wires means it runs, great saftey feature.

__________________
KLK, MCSE

1990 500SL

I was always taught to respect my elders.
I don't have to respect too many people anymore.