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B48G — Keep these points in mind when testing or servicing the

For the B48G.

Procedure

  1. Be sure engine is being run long enough and fast
  2. The regulator-rectifier has built in protection against
  3. Be sure regulator-rectifier plug (connector) is

Source: manual:965-0757_Onan_B43E_spec_A-D_B43G_spec_A-D_B48G_spec_A-G_Engine_Service_manual_06-1988.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.