Generac GN-724 / GN724 — Engine Compression Check
Testing & diagnosis
For the Generac GN-724 / GN724, from the Generac service manual.
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Procedure
- Remove both spark plugs.
- Insert compression gauge into one cylinder at a time.
- Turn engine over with starter until pressure stops increasing.
- Record reading; repeat on other cylinder.
- Difference between cylinders should not exceed 25%.
Tools required
- Compression gauge Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Difference between cylinders should not exceed 25%
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.