WUR question

[metshaper]

I have one of brain Leask WUR’s and was wondering what the part with arrow adjusts?

[356911930]

The part number on top of the warm up regulator might help you get some feedback.

Rahl

[Hokie6]

Here's a schematic of the WUR. The thermal switch (what you're referring to) adjusts at what temperature the secondary heater is active. Below 20°C, the 42 ohm heater is active, and above that, the 2nd heater kicks in. This allows the engine to run more rich when cold, then warms faster above 20° bringing the control pressure up faster.

[PelicFrank]

Any part numbers? That might help proffer a solution.