Generac — Replacing Lubricating Oil and Oil Filter
Maintenance · Engine
From a Generac owner's manual covering: XG03245, XG04045, XG04845. Check it applies to your exact model before use.
Applies to: Generac Model, Generac Number, Generac XG03245, Generac XG04045, Generac XG04845
Before you start
- Risk of burns. Allow engine to cool before draining oil or coolant. Failure to do so could result in death or serious injury. (W000139)
Procedure
- Follow Removing From Service; wait at least 10 minutes.
- Remove oil drain hose from holding clamp.
- Use two wrenches to remove oil drain plug; drain oil.
- Install oil drain plug and hose into holding clamp.
- Turn oil filter counterclockwise to remove; wipe adapter.
- Apply clean engine oil to gasket of new oil filter.
- Install oil filter by hand until gasket contacts; tighten 3/4 to 1 full turn.
- Fill engine with 11.6 qt (11 L) recommended oil for 4.5 L NA.
- Install oil fill cap.
- Connect negative battery cable; install 7.5 amp fuse.
- Press MANUAL to start; run one minute; inspect for leaks.
- Press OFF; wait 10 minutes; check oil level and add as needed.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 11.6 qt (11 L) oil
- oil filter full flow spin-on cartridge
Full service-parts list: Generac Model →, Generac Number →, Generac XG03245 →, Generac XG04045 →, Generac XG04845 →
Source: Generac 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.