Since my 1989's actuator no longer holds vacuum, I decided to "disassemble" it. The diaphragm seems to be made of some kind of vinyl impregnated material - very thin. Mine has cracks where it folds in the backside that eventual worked thru. Had to hold it close to a bare lightbulb with a magnifying glass to find the hole. Dealer says these are discontinued parts, carb rebuilders that claim to sale parts are hording used ones. Think I can fix it?
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