What are flame guard filaments for?

[koan]

I realise flame guard filaments are to stop flames but under what circumstance?

To stop a backfire in the inlet manifold igniting oil vapour in the crankcase or to stop flames in the crankcase getting near the inlet system?

koan

[carl888]

Yep!

Regards,

Carl.

[WGB]

I would imagine it is to stop a backfire igniting petrol vapour in the crankcase.

Bill

[koan]

Whichever way it is I wonder if its that much of problem.

It does occur to me that a side effect could  be the wires trapping or "condensing" oil in in the blow by vapour and having it drip back into the works rather than settling in the air filter housing.

koan

[WGB]

It does occur to me that a side effect could  be the wires trapping or "condensing" oil in in the blow by vapour and having it drip back into the works rather than settling in the air filter housing.

koan

That may be why they are shaped like an Archimedes screw.

Bill