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Compatible — Installation:

For these models: J8-JC Series, JB, JB-E, JB-JC, jB-M, jB-R, jC.

Procedure

  1. Install the throttle shaft and valve, using new screws.
  2. Install choke shaft and valve. Center the valve in the
  3. Install the main nozzle (Prior to Spec R) making sure
  4. Install the intake valve seat and valve.
  5. Check the float level with the carburetor casting in·
  6. 7. Install the bowl ring gasket, bowl and bowl nut (and

Source: manual:967-0500_Onan_JB_JC_Genset_Engine__Magneciter_Gen-end_Service_Manual_11-1971_bestmanual.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.