The Koel R550 Series is a 1.1 L 2-cylinder naturally aspirated engine rated at 1800 rpm. It powers generator sets from Wildcat, including the Frontier Diesel 10KW and Frontier Diesel 15KW. It holds 2.9 L (0.8 gal) of oil.
Also known as: KOEL R550 Series
Part of the Koel R550 engine family — 3 variants share parts & fitment.
| Oil capacity | 2.9 L |
|---|---|
| Displacement | 1.1 L |
| Cylinders | 2 |
| Aspiration | Naturally Aspirated |
| Rated speed | 1800 rpm |
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Dry | — | |||
| Fuel filter | 0.6 liter Single bowl Spin-on | — | |||
| Oil filter | Spin-On | — | |||
| Oil | Full pressure lubrication system | 2.9 liters | — |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Clearance | Maximum allowable back pressure | 3.3 | in H2O ±1.0 | Exhaust system |
| Other | Frequency Regulation Steady State | +/- 0.25% | % | |
| Pressure | Exhaust temperature at rated load | 650 | °C | Full load |
| Pressure | Maximum Allowable Back Pressure | 3.3 ± 1.0 | in Hg / kPa | |
| Pressure | Maximum Allowable Exhaust Back Pressure | 3.3±1.0 | in Hg | at rated load |
| Speed | Engine speed | 1800 | RPM | Rated |
| Temperature | Exhaust Temperature | 1202 | °F | at rated load |
| Temperature | Exhaust Temperature at Rated Load | 1202 / 650 | °F / °C | Rated Load |
| Temperature | Rated temperature | 85 | °C | Standard operating |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
The Koel R550 Series engine has an oil capacity of 2.9 liters.
The Koel R550 Series has a displacement of 1.1 liters with 2 cylinders.
The Koel R550 Series powers 2 generator set(s), including Wildcat Frontier Diesel 10KW, Wildcat Frontier Diesel 15KW.