I have a 4 OHP Quattro Briggs & Stratton engine on my lawnmower, and it
seems to be running rich. (It sort of "gulps" while running, and near the
exhaust a black spot develops when the engine is running. ) I was told there
should be a fuel adjustment screw near the sparkplug, but I don't see it.
Could someone tell me if there is such a screw, and if so, how I can find it.
on lawnmowers and pre pollution control cars the adjustment screw was on
the carb. and you would use a screw driver and screw it in all the way
gently and then back it up 1 1/2 turns and play with it from there...
how does that sound.....
Thanks for your reply. I have a general idea what I am looking for (I used to
work on a 66 Pontiac Tempest), but I don't know where to look. I was hoping
someone could save me the time of trying to locate the screw.
JD, who made this engine? If it's the widespread Briggs & Stratton,
the mixture needle screw used to be on the back side of the carb,
behind the bracket connecting the tank to the cylinder head. It's
accessible thru a small circular hole, and takes a standard flat
OT BTW, being a car nut, I bet you regret getting rid of that
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