FUNCTION
The second stage diaphragm operates the second stage throttle depending upon throttle position and engine load.
TROUBLESHOOTING
If the second stage diaphragm is not operating properly the following may be experienced:
- poor acceleration
- inability to reach full throttle
INSPECTION
- Locate the two vacuum supply holes for the second stage diaphragm housing
- While the plate block section is removed, lift the second stage diaphragm and place fingers over the vacuum holes in the venturi
- Release the diaphragm. Vacuum will hold the diaphragm if there are no leaks
- If the diaphragm is bad, it needs replacing
- Reassemble the cabruretor using new gaskets
