Excessive fuel consumption could be an improper air/fuel setting. The Lawnboy may
be a type where there are no external adjustments available, or they are buried somewheres inside
the carboretor. Uneven running could be the float in the carburator is sticking, not allowing the
chamber to evenly fill with fuel. One drawback of these inexpensive engines is that they are not
designed for easy maintenance.

Sherwin D.

Frank Logullo wrote:

Silverstone Lawnboy engine cycles up and down. Still cutting OK but it is
annoying and probably headed for the shop. Googling suggested adjusting nut
on carburetor but I can't find one. It's been in the shop before (about a
month before end of last season). Mower is 5 years old and used ~2 hr/week
in cutting season. I do all the suggested maintenance but they tell you
nothing about inner workings. When tuned, the damned thing uses gas like
crazy but when it settles down, gas usage goes way down which makes me think
there is some simple bottleneck/adjustment to carburetor. Any suggestions
would be welcome.
Frank