Generac — Prepare for Long Term Storage
Maintenance · Fuel system/Engine
From a Generac owner's manual — check it applies to your exact model before use.
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Before you start
- Never store engine with fuel in tank indoors near an open flame
Procedure
- Remove all gasoline from fuel tank
- Start and run engine until it stops from lack of fuel
- After engine cools, drain oil from crankcase and refill with recommended grade
- Remove spark plugs, pour ~1/2 oz (15 ml) oil into cylinders, crank 2 seconds with rag over hole
- Remove black battery cable from negative post and attach to frame ground
- Install and tighten spark plugs; do not connect wires
- Clean generator outer surfaces; check cooling slots unobstructed
- Store unit in clean, dry place
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.