Booger Posted October 29, 2022 Report Share Posted October 29, 2022 A flatspot from the stop sign on giddyup... AKK! something in carb? (B&B D6 or whatever) . Filter isnt old. Spray it down with carb cleaner. Nope. Put on backup carb. Same same ...Timing? Quote Link to comment Share on other sites More sharing options...
keithb7 Posted October 29, 2022 Report Share Posted October 29, 2022 (edited) Remove air filter. With a flashlight Look down carb. Engine off Cycle throttle linkage open a couple times. Do you see a raw stream of gas being injected into the carb? If not pull top off carb bowl. Remove accelerator pump. Re-stretch stretch spring? Is leather cup hard and crusty? Is accelerator pump linkage hooked up to throttle linkage properly? This may help add depth and illustrate the issue: Edited October 29, 2022 by keithb7 1 Quote Link to comment Share on other sites More sharing options...
Sam Buchanan Posted October 29, 2022 Report Share Posted October 29, 2022 (edited) Make sure there isn't a vacuum leak to the distributor advance and/or the advance unit hasn't failed. Could also be something going on with the centrifugal advance in the distributor. Edited October 29, 2022 by Sam Buchanan 1 Quote Link to comment Share on other sites More sharing options...
Booger Posted October 30, 2022 Author Report Share Posted October 30, 2022 6 hours ago, keithb7 said: Remove air filter. With a flashlight Look down carb. Engine off Cycle throttle linkage open a couple times. Do you see a raw stream of gas being injected into the carb? If not pull top off carb bowl. Remove accelerator pump. Re-stretch stretch spring? Is leather cup hard and crusty? Is accelerator pump linkage hooked up to throttle linkage properly? This may help add depth and illustrate the issue: The accelerator pump plunger ring has been known to dry out with the ethenol gas. Hope its the first and not the later. Last I looked 40# of vacuum Quote Link to comment Share on other sites More sharing options...
Solution Booger Posted October 30, 2022 Author Solution Report Share Posted October 30, 2022 Accelerator pump plunger gasket replace om B&B D6. YES! Quote Link to comment Share on other sites More sharing options...
Booger Posted October 30, 2022 Author Report Share Posted October 30, 2022 moral of the story ethnanol gas eats up stuff Quote Link to comment Share on other sites More sharing options...
Sniper Posted October 30, 2022 Report Share Posted October 30, 2022 Leather cups do not like going dry, ethanol or not. If you can find a modern synthetic rubber/silicone cup that would be the best solution. Quote Link to comment Share on other sites More sharing options...
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