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| Joined: | 04-24-2006 |
| Location: | Chandler, Arizona USA |
| Posts: | 18 |
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Regards, Jim JH sn 11210
| View single post by James Sohl | ||||||||||
| Posted: 02-04-2013 07:45 pm |
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James Sohl
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The distributor vacuum diaphragm is for retard on overrun. On the left carburetor, there should be an attached vacuum controlled valve that applies manifold vacuum to the distributor on high vacuum, i.e. overrun. It is purely an emissions item and the engine will operate fine without the vacuum retard. It is important to make sure that all overrun vacuum connections are carefully, completely blocked if you remove the plumbing. I know, I know, most distributors have a vacuum advance, just not all distributors. Regards, Jim JH sn 11210
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