SSQC4B1400K2
SWAGELOK SS-QC4-B1-400K2, Quick Connect Orange Key 1/4" , LOT OF 9 #1181W6
The thermostat assembly has a simple two-wire connection that makes replacement easy.
SWAGELOK SS-QC4-B1-400K2, Quick Connect Orange Key 1/4" , LOT OF 10 #1181W5
A nice touch on this machine is the Briggs & Stratton fuel filter location.