Can't really equate a lawn mower to a genset. Most lawn mowers are gas, whereas a genset can be gas, diesel, or propane. Then the lawn mower doesn't have an electronic control board to check for low oil, over temp, or speed. Then there is the Voltage Regulator that a genset has that isn't included in a mower.
Although some of the conditions that affect a lawn mower negatively are the same as for a genset, there are many, many others that require a bit more research and study. But, a background with lawn mowers is certainly a help.
Here's probably the best place to start:
Flight Systems Genset info...
