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Bolt type EGT probe
This probe is based on a metric 8x1 fine pitch thread such as used on some Rotax engines. It can be used on manifolds that do not have provision for this thread by drilling a 5mm hole for the probe and welding a suitable 8x1 fine pitch nut to the manifold to retain the probe.
Consult engine manufacturer for correct position. Typical positions are:
2-stroke engine: 100mm from exhaust flange
4-stroke engine: 75mm from exhaust flange