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Reply to "Mechanical vs Vacuum Secondaries"

...On All My Vacuum Secondaries 600-750, I had the best results using the SHORT BLACK Spring (NOT the LONGER Black spring), shown in the Photo. Regardless of the Chart...It seems to be in the mid-range of that Spring Set, Average. Not too Weak, Not too Strong. The Secs will open-up right along with the Engine Revs. Quickly and Balanced. NO Bog, No Stutter, No Hesitation. Strong!! FWIW

A good place to start your testing. And, Be Sure the Accelerator Pump is Adjusted Precisely. As in the AP Cam is on the correct hole, and more.

MJ

Last edited by marlinjack
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