So can this incorrect gaping then do engine damage?
---------- Can cause backfire that damages the flapper on your AFM, cause
detonation, lean burn, over heat your engine.
What is the proper way to adjust the gap if its preset too wide?
----------- Use a feeler gauge or graduated gaping disk to set them.
If its too narrow I assume its fairly easy to widen it with a flat head
or something.  Gotta check mine out
now - I changed 'em about 6 months ago and assumed (I know I know never
assume) that Bosch's being such a higher brand and more expensive tha any
automart store brand would be preset correctly.
-------------- Bosch are the same or lower price as other spark plugs,
not normally higher unless you go for double, tripple, quad electrodes
that you don't need.

Thanks,
Marla
'87 Westy GL Van "Morrison"

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