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Generac NP-30G / NP-40G — Return to Service After Storage

Maintenance · Engine

For the Generac NP-30G / NP-40G, from the Generac service manual.

Applies to: Generac NP-30G, Generac GN-190 / GN-220 engine, Generac GN-190 or GN-220 (see NOTE 2) engine, Generac GN-220 engine

Before you start

  • DO NOT USE TAP WATER IN THE BATTERY.

Procedure

  1. Verify correct oil is in crankcase by checking the tag; drain and refill if necessary.
  2. Check battery; fill cells with distilled water and recharge to 100 percent or replace if defective.
  3. Turn OFF all electrical loads; start engine at no-load and let it warm up.
  4. Apply electrical loads to at least 50% of rated capacity.
  5. When thoroughly warmed up, turn off/disconnect all loads, then shut the engine down.

Specs & values

  • Apply at least 50% of rated capacity

Full service-parts list: Generac NP-30G →

Source: Generac 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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