Cummins/Onan 10CW — Governor Adjustment

Adjustments

For the Cummins/Onan 10CW, from the Cummins/Onan owner's manual.

Applies to: Cummins/Onan CW series engine

Procedure

Warm up plant at light load.
Check 1/32 in throttle lever to stop pin clearance.
Disconnect booster external spring.
Turn speed adjusting nut for 60-61 cycles no load.
Apply full load; check cycle spread within 3 cycles.
Adjust sensitivity screw half turn if spread excessive.
Reconnect booster spring with no tension.
Verify frequency 1-2 cycles higher at full load.

Tools required

voltmeter Amazon
frequency meter Amazon

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

Specs & values

No load 60-61 Amazon eBay cycles
Maximum 3 cycle drop no load to full load

Source: Cummins/Onan owner's 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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