I'm referring to advancing the timing of the sparkplug firing.
With the motor turned off, try pretending to give it full throttle.
I'm not familiar with your motor but on everyone I've had anything to do
with, you should see the guts of the magneto UNDER the flywheel rotate. If
not, look for the connecting rod that might have dropped off.
On cars etc it is usually vacuum controlled & not linkage drect from
throttle.
Sounds like yours is OK on idle but not advancing on higher revs.
Ofcourse it might be vent blocked in cap like other comment. Try it with the
lid off the tank?
I also have seen outboards come out of the factory with high altitude jets
instead of low altitude ones causing similar symptoms as yours.



wrote in message
ups.com...
I'm sorry, but, what's the advance? Something with timing? I had
checked the crankcase puls line at one point and it had good suction.
Are there other adjustments I may need?
The strange thing is that the engine ran fine until July. It's just
struggling to get gas for some reason.