FoMoCo Accelerator pump bad - Saab Sonett Bulletin Board - Saabnet.com
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FoMoCo Accelerator pump bad
Posted by Geoff M (more from Geoff M) on Tue, 10 May 2011 22:17:36
In Reply to: Re: 1973 Sonett - Accelerator pump bad, Jim H, Sat, 25 Sep 2010 09:14:06
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I have the same problem as Chris Hansen had in September – a leaky accelerator pump on the FoMoCo carb from my 1971 SAAB 96.
When I took the carb apart I noticed three missing parts referenced on the diagram provided by my rebuild kit: the pump ball, the "valve - pump check" (looks like a specialized washer) and a "spring - pump valve." (Note that the big spring, called the pump return spring, is present.)
The kit provides two of the missing parts: the ball and the pump check valve. But no spring. However, my Haynes manual doesn't include the spring in their diagram, and I wonder if it's really missing or just wasn't part of the design for the '71 FoMoCo carb. Is anyone familiar enough with these carbs to know the spring's purpose, and whether it's essential?
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