Jet Bumper spring

I received the jet bumper spring from a local shop today and fit it into the weak jet bumper. It didn’t work. I took it out again and compared it to the one that had been in there originally – it was the same (a 10-135). Time to order the right one – again!

I had been doing a bit of research into springs, as you do, and discovered that the strength of a spring is proportional to the thickness of the wire and inversely proportional to the coil diameter and the number of turns in the coil. So, as I now have to wait until I receive the right coil, I thought I’d do a little experimenting. So I took a turn out of the coil:

10-135 spring on left - minus one coil on right

10-135 spring on left – minus one coil on right

I put this coil in the pop bumper, but it also didn’t work! Guess I’ll have to wait for the right spring after all!

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