Generac — Engine Oil Pressure Check
Testing & diagnosis · Lubrication system
From a Generac service manual covering: IM100G, IM80G, NP100G, NP80G. Check it applies to your exact model before use.
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Procedure
- Warm up the engine. Then shut down and remove the oil pressure switch.
- Install a direct reading pressure gauge in the oil pressure switch port.
- Start the engine and check oil pressure with the engine running at no-load condition.
- Oil pressure should be approximately 40-46 psi (2.8-3.2 kg/cm2) at 1860 rpm.
Tools required
- direct reading pressure gauge Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 40-46 psi (2.8-3.2 kg/cm2) at 1860 rpm
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.