Generac Cylinder Heads

Generac Cylinder Heads: Genuine OEM Parts for Reliable Power

When a generator's engine loses compression or shows signs of cylinder wear, the cylinder head is often at the center of the problem. As one of the most thermally and mechanically stressed components in any small engine, the cylinder head seals the combustion chamber from above, containing the explosive forces that convert fuel into usable electricity. For Generac generators — whether a whole-home standby unit or a portable workhorse — sourcing the right cylinder head means sourcing a genuine Generac OEM part.

Engine Families Covered

Generac cylinder heads span a range of the brand's most widely deployed engine families. The Generac 0H1760ASRV Cylinder #1 Head Replacement Kit fits many of the air-cooled 990/992/999cc engines made from the late 1990s to current models. The parallel Cylinder #2 kit (0H1760BSRV) rounds out coverage for these twin-cylinder powerplants. On the smaller end of the displacement spectrum, the Generac 0G0276 Cylinder #2 Head Replacement Kit covers many of the air-cooled 530cc engines made from approximately 2005 to current models. For high-output 22kW gensets, the Generac A0000117124 Head Assembly Complete Cyl #1 Kit is the Cylinder #1 head used on GT-999 engines in 22kW generator sets.

What's Included in a Generac Cylinder Head Kit

Generac packages their cylinder head replacements as comprehensive kits rather than bare castings alone. Each kit includes the various parts and gaskets needed to replace a single cylinder head — reducing the risk of a failed reseal due to a reused head gasket. It's worth noting that these are unassembled kits that require assembly, and each cylinder uses a different head replacement kit, so confirming the correct cylinder number before ordering is essential.

Broad Generator Compatibility

One of the practical advantages of Generac OEM cylinder heads is their reach across badge-engineered and co-branded generator lines. Generac replacement parts will also usually fit the following Generac-branded generators: Honeywell, Guardian, Siemens, Carrier, Watchdog, Centurion, and Bryant. This means owners of generators sold under these names can often source the same OEM Generac cylinder head without any modification.

Why Choose OEM Over Aftermarket?

The cylinder head is responsible for sealing the cylinder from the top to form the combustion chamber, and because of this, it is met with high pressure and high temperatures — making maintenance of these parts essential. Aftermarket castings may differ in port geometry, valve seat hardness, or head bolt thread tolerances. By choosing a kit with genuine Generac OEM parts, you can have confidence that the cylinder head replacement will be precise and made with quality in mind. Always cross-reference your generator's model number and parts manual to ensure the correct head is selected, as part numbers are occasionally superseded — for example, part 0D8067A was updated to 0H1760ASRV in later service documentation.

Browse the full selection of cylinder heads available, or explore the complete Generac parts catalog to find everything needed to restore your generator to full operating condition.