Engines used in Generac generators
Generac uses two types of engines: the OHV (Overhead Valve) and OHVI (Overhead Valve Industrial).
Which engines are paired with which generators?
- All air-cooled home standby generators (except the 7.5kW PowerPact) are built with OHVI G-Force Engines.
- A majority of portable generators feature OHV engines. Larger portables, like the GP15500 EFI will feature the OHVI engine.
OHV (Overhead Valve)
- Generac designed and assembled overseas
- No oil filter (will require more frequent maintenance)
- Splash lubrication - Internal engine action splashes oil on moving parts
- Mechanical governor - Not as quick to respond as an isochronous governor
- Rated for 1,000 hours with proper maintenance
OHVI G-Force (Overhead Valve Industrial)
- Manufactured in Whitewater, WI
- Featured on all 9-26kW air-cooled units (engine size matches power rating of generator, see below)
- Pressurized lubrication - Oil is pumped directly to critical areas
- Incorporates both an air filter and a spin-on automotive-style oil filter
- Electronic (Isochronous) Governor - Fastest responding governor available. Maximizes engine performance and virtually eliminates stalling
- Up to 3,000-hour rating with proper maintenance
The OHVI 460cc engine is used in 10kW and 9kW liquid propane (LP) natural gas (NG) generators.
The OHVI 816cc engine is used in 14kW and 18kW natural gas (NG) and liquid propane (LP) generators.
The OHVI 999cc engine is used in 22kW LP/19.5kW NG, 24kW LP/21kW NG. 26kW LP/22.5kW NG generators.
OHV engines are used in a majority of portable generators and have a range of sizes.
Where can I get parts for my Generac generator engine?
