The Generac SG045 is a 5.4 L 8-cylinder naturally aspirated engine rated at 1800 rpm. It powers generator sets from Generac. It holds 5.7 L (1.5 gal) of oil and 11.36 L (3.0 gal) of coolant.
Also known as: Generac SG045
| Oil capacity | 5.7 L |
|---|---|
| Coolant capacity | 11.36 L |
| Displacement | 5.4 L |
| Cylinders | 8 |
| Aspiration | Naturally Aspirated |
| Rated speed | 1800 rpm |
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Standard | — | |||
| Fuel filter | Standard | — | |||
| Battery | Standard | — | |||
| Belt | Standard | — | |||
| Coolant | Standard | 11.36 L | — | ||
| Oil | Full-flow spin-on cartridge | 5.7 L | — |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Generator set | Inspect | 100 hr | 12 mo | First service — Level 4 mid-level inspection; annually or following each 100 hours of operation; approx. 5.0 man-hours; authorized Generac Service Dealer only; add 20% to all times for 8 cylinder or larger engines |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Coolant | Half low silicate, ethylene glycol base antifreeze and half soft water (50-50) | 17.0 L | Cooling System SG035/045/075 = 17 L (4.5 U.S. gals.); do not use chromate base rust inhibitor or high silicate antifreeze boosters | ||
| Engine oil | SAE 10W or 15W-40 | For Service CC, SD, SE or SF | below 0°C | 4.25 L | Below 32 F (0 C) |
| Engine oil | SAE 20W-20 or 15W-40 | For Service CC, SD, SE or SF | -1°C to 27°C | 4.25 L | 30 to 80 F (-1 to 27 C) |
| Engine oil | SAE 30W or 15W-40 | For Service CC, SD, SE or SF | above 27°C | 4.25 L | Above 80 F (27 C) |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
The Generac SG045 engine has an oil capacity of 5.7 liters.
The Generac SG045 has a displacement of 5.4 liters with 8 cylinders.
The Generac SG045 powers 1 generator set(s), including Generac SG045.