contact gap for w123 engine

W

wireman

Senior Member
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Sep 20, 2005
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lancashire
Your Mercedes
nice 201 2.5D 1993 & very nice 129 SL500 1994
Its commonly 0.015"/0.4mm, any more leads to excessive breaker arm velocity and consequent points bounce. I do not have the specific data for your engine but 15 thou was quite standard on most older distributors and I can't think of one that I ever dealt with which was any different.

Do beware that the points gap affects the ignition timing and that if the timing is to be set up then the points gap must be set first.

It is an old car and wear may have taken place on the dizzy cam, or the bearings supporting the dizzy shaft, check it on all four lands to be sure that your ignition will be consistent.
 
television

television

Always remembered RIP
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Daventry
Your Mercedes
2002 SL500, 216 CL500, all fully loaded
Interesting wireman,,yes the bearing could wear making it very hard to get even firing, I think too that 15 thou was pretty standard:D
 
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