Cummins/Onan — Automatic Choke Adjustment

Adjustments

From a Cummins/Onan service manual — check it applies to your exact model before use.

Applies to: Cummins/Onan NHEL

Procedure

Apply at least 100 mm mercury vacuum to choke breaker.
Insert 8.6 mm drill rod between choke plate and throat.
Bend link until choke plate lip touches drill rod.
Use two pliers to bend link.

Tools required

vacuum source Amazon
drill rod Amazon
pliers Amazon

Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.

Full service-parts list: Cummins/Onan NHEL →

Source: Cummins/Onan service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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