Lawnmower oil temperature gauge

Many if not most non ride-on lawnmowers have air-cooled gasoline-fuelled engines, typically a single cylinder four stroke.

Air-cooled engines need to be warmed thoroughly before they develop full power output. On air-cooled aviation engines, this is done by monitoring the oil temperature.

BorgCo engineers are developing a simple Go/No go indicator using a bimetallic strip which replaces the oil filler plug/dipstick and reveals a green telltale when operating temperature is reached.

This reduces stalling and engine wear.

All that is then required is to train the user not to start mowing the lawn until the green button shows. This is achieved through a comprehensive programme of frequent vicious beatings, electric shocks, sleep deprivation, solitary confinement in a restricted space, waterboarding and verbal abuse (harsh but necessary; it eventually worked when explaining about oiling hedgecutters before and after use).