Inertia switch plunger
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Plunger for the Inertia Switch Ltd fuel cut-off used in the Triumph TR5 and TR6 PI models.
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Model information
- Source
- Printables
- Category
- Automotive
- License
- Creative Commons — Attribution
This part is to replace the internal plunger in the inertia fuel cut-off switch used in the Triumph TR5 and TR6 models with the Lucas Mk 2 petrol injection system. The plunger is often the cause of failure as the electrical contacts corrode and overheat, causing the plunger to melt.
To use this plunger, you will need to source all other parts of the switch (see attached photo of disassembled switch. Melted/broken plunger is in the foreground. Metal contact ring has been installed on the new (black) plunger.
This needs to be printed in ABS, or possibly PETG (untested) to withstand the under bonnet temperatures.
If you want to modify this design just drop me a note and I'll send you the components (made in Tinkercad)