Generac GT-990 — Front Engine Access
Repair & overhaul
For the Generac GT-990, from the Generac service manual.
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Procedure
- Follow Stator/Rotor/Engine removal procedures Steps 1-5.
- Remove control panel.
- Remove engine divider panel.
- Remove intake manifolds using 6mm allen wrench.
- Remove air box using 5/32 inch allen wrench; disconnect throttle linkage.
- Unbolt oil cooler using 10mm socket.
- Remove blower housing using 8mm socket.
- Remove flywheel using 36mm socket and steering wheel puller.
Tools required
- 7mm socket Amazon
- 10mm socket Amazon
- 6mm allen wrench Amazon
- 5/32 inch allen wrench Amazon
- 8mm socket Amazon
- 36mm socket Amazon
- steering wheel puller Amazon
- M8x1.25 bolts Amazon
- 13mm socket Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Flywheel nut 50 ft-lbs
- Stator bolts 6 ft-lbs
- Rotor bolt 30 ft-lbs
- Engine adapter 25 ft-lbs
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.