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    470 Distributor Mechanical Advance

    when placed side-by-side they were the same.
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    470 Distributor Mechanical Advance

    Thanks but I think that's a 6-cyl. 19414A2, is the four cylinder for the 3.7l 165 It just amazes me that there doesn't seem to be a parts-level breakdown for any of these distributors. I would think this spring thing on the older distributors would be a pretty common issue. I think I found a...
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    470 Distributor Mechanical Advance

    I ordered a Distributor Advanced Curve Kit that was for GM HEI distributors... it was $9 and the weights and springs looked like mine in the picture (which I admit is not a very scientific way to choose replacement parts). I received it today and all components looked very similar to the parts...
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    470 Distributor Mechanical Advance

    I have Mercruiser (19414A2) and Sierra (18-26111-1) part numbers for the distributor but I can't find any additional information about parts for either. Is there a Pentronics P/N or is there a Prestolite equivilent?
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    470 Distributor Mechanical Advance

    I'd like to do that but I haven't been able to find any sort of part number or description of the springs. Mine is 32 years old too. How did you find yours?
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    470 Distributor Mechanical Advance

    The kit has several sets of springs. Currently, the centrifugal advance is over advancing. Either tighter springs or something to limit the advance would be the likely solution. For $15 it seems like a reasonable thing to try. As I mentioned earlier I can't find any documentation or...
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    470 Distributor Mechanical Advance

    I know... I just want the set of springs and shims.
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    470 Distributor Mechanical Advance

    I just found this... I may order it and give it a shot... https://www.summitracing.com/parts/pnx-d700700?seid=srese2&utm_source=bing&utm_medium=cpc&utm_campaign=Brands+|+P&utm_term=4581871113141913&utm_content=GSAPI+5ba295c791e5c
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    470 Distributor Mechanical Advance

    dwell and timing are good. To which bushings are you referring? I looked at the parts diagram and I can't figure out where they are.
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    470 Distributor Mechanical Advance

    Right, the timing does advance as you described. I think it is possible that the springs have weakened; however, the advance follows the curve as rpms are increasing and then just keeps going. I can't find any specs or description of the springs but I will try to find replacements. I did...
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    470 Distributor Mechanical Advance

    Thanks so much for the speedy reply! It is still points... new points, rotor and condenser were installed during the rebuild. I examined, cleaned and lubricated the distributor during rebuild and didn't see any issues. When I was cleaning it up I didn't break down the advance mechanism so I...
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    470 Distributor Mechanical Advance

    Hello! I've recently acquired and rebuilt a 3.7l 165. All is good at lower RPMs but under load and over 3K rpm I hear a clacking sound which I believe to be detonation. I believe the issue is excessive timing advance from the mechanical advance. I measured the advance at 500 rpm increments...
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