Demon Fuel Systems 190004 - Manual (Page 5)

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11. On vacuum secondary models, the diaphragm housing is attached to the main body by three
screws and the diaphragm rod is held on the throttle shaft linkage by a retainer "C Clip". With
these removed, the housing can be pulled from the main body (Fig. 6).
Figure 6
12. The cork gasket on the rear of the diaphragm housing is also critical to secondary operation as it
seals the vacuum passage between the housing and the main body. This can be discarded at this
time, as your package includes a new seal (Fig. 7).
Figure 7
13. Remove the 4 hex head screws that hold the vacuum pod top to the base to be able to replace the
diaphragm (Fig. 8). Assembly is the reverse of the removal.
Figure 8