On Fri, 23 Feb 2018 09:43:12 -0800, ultred ragnusen
wrote:

What mostly makes a small simple engine (such as the Honda GC 160 that runs
my pressure washer or the Honda engine that runs my lawnmower) "wheeze"
fast & slow, fast & slow, fast & slow while idling under no load?


Had that problem with my John Deere X300. After a lot of google
research, I found a possible cause as "clogged air filter." I removed
mine, washed out the foam prefilter and tapped out the paper filter.
Reinstalled, and everything ran fine. Started surging again about a
month later, so I replaced the paper filter. Been fine ever since.

-dan z-


--
Someone who thinks logically provides
a nice contrast to the real world.
(Anonymous)