Why specify a FG Wilson engine
FG Wilson is one of the world's largest packaged generator brands, using Perkins engines inside a globally standardised design. It is the reference point for rental companies and contractors who need familiar, interchangeable equipment wherever they operate.
- Globally consistent package design
- Enclosed and open sets built to order
- Deep spare-parts availability
FG Wilson powered generator sets
Every rating we list for this engine platform, with the engine model for each.
| Model | Standby Power (kVA) | Standby Power (kW) | Prime Power (kVA) | Prime Power (kW) | Engine Model | Data Sheet |
|---|---|---|---|---|---|---|
| CM-FW9.5 | 9.5 | 7.6 | 8.5 | 6.8 | 403D-11G | [EN] |
| CM-FW13.5 | 13.5 | 10.8 | 12.5 | 10 | 403D-15G | [EN] |
| CM-FW18 | 18 | 14.4 | 16.5 | 13.2 | 404D-22G1 | [EN] |
| CM-FW22 | 22 | 17.6 | 20 | 16 | 404D-22G | [EN] |
| CM-FW33 | 33 | 26.4 | 30 | 24 | 1103A-33G1 | [EN] |
| CM-FW50 | 50 | 40 | 45 | 36 | 1103A-33TG1 | [EN] |
| CM-FW55 | 55 | 44 | 50 | 40 | 1103A-33TG2 | [EN] |
| CM-FW65 | 65 | 52 | 60 | 48 | 1103A-33TG2 | [EN] |
| CM-FW88 | 88 | 70.4 | 80 | 64 | 1104A-44TG2 | [EN] |
| CM-FW110 | 110 | 88 | 100 | 80 | 1104C-44TAG2 | [EN] |
| CM-FW150 | 150 | 120 | 135 | 108 | 1106A-70TG1 | [EN] |
| CM-FW165 | 165 | 132 | 150 | 120 | 1106A-70TAG2 | [EN] |
| CM-FW200 | 200 | 160 | 180 | 144 | 1106A-70TAG3 | [EN] |
| CM-FW220 | 220 | 176 | 200 | 160 | 1106A-70TAG4 | [EN] |
| CM-FW250 | 250 | 200 | 230 | 184 | 1506A-E88TAG2 | [EN] |
| CM-FW275 | 275 | 220 | 250 | 200 | 1506A-E88TAG3 | [EN] |
| CM-FW300 | 300 | 240 | 275 | 220 | 1506A-E88TAG4 | [EN] |
| CM-FW330 | 330 | 264 | 300 | 240 | 15606A-E88AG5 | [EN] |
| CM-FW400 | 400 | 320 | 350 | 280 | 2206A-E13TAG2 | [EN] |
| CM-FW450 | 450 | 360 | 400 | 320 | 2206A-E13TAG3 | [EN] |
| CM-FW500 | 500 | 400 | 455 | 364 | 2506A-E15TAG1 | [EN] |
| CM-FW550 | 550 | 440 | 500 | 400 | 2506A-E15TAG2 | [EN] |
| CM-FW605 | 605 | 484 | 550 | 440 | 2806A-E18TAG1 | [EN] |
| CM-FW660 | 660 | 528 | 600 | 480 | 2806A-E18TAG1A | [EN] |
| CM-FW715 | 715 | 572 | 650 | 520 | 2806A-E18TAG2 | [EN] |
| CM-FW780 | 780 | 624 | 706 | 564.8 | 2806A-E18TTAG4 | [EN] |
| CM-FW850 | 850 | 680 | 770 | 616 | 2806A-E18TTAG5 | [EN] |
| CM-FW900 | 900 | 720 | 800 | 640 | 4006-23TAG3A | [EN] |
| CM-FW1000 | 1,000 | 800 | 910 | 728 | 4008TAG1A | [EN] |
| CM-FW1100 | 1,100 | 880 | 1,000 | 800 | 4008TAG2A | [EN] |
| CM-FW1250 | 1,250 | 1,000 | 1,125 | 900 | 4008-30TAG3 | [EN] |
| CM-FW1375 | 1,375 | 1,100 | 1,250 | 1,000 | 4012-46TWG2A | [EN] |
| CM-FW1500 | 1,500 | 1,200 | 1,350 | 1,080 | 4012-46TWG3A | [EN] |
| CM-FW1650 | 1,650 | 1,320 | 1,500 | 1,200 | 4012-46TAG2A | [EN] |
| CM-FW1875 | 1,875 | 1,500 | 1,700 | 1,360 | 4012-46TAG3A | [EN] |
| CM-FW2000 | 2,000 | 1,600 | 1,850 | 1,480 | 4016-61TRG1 | [EN] |
| CM-FW2250 | 2,250 | 1,800 | 2,000 | 1,600 | 4016-61TRG2 | [EN] |
| CM-FW2500 | 2,500 | 2,000 | 2,250 | 1,800 | 4016-61TRG3 | [EN] |
50 Hz / 60 Hz builds are listed. Model codes carry the standby rating and, where two builds share a rating, a trailing letter.
FG Wilson publishes ratings to ISO 8528 with both prime and standby figures, and the ESP rating is explicitly limited to one hour in twelve. Derate follows the engine supplier's curve, which we quote per model.
One package, two engine families
FG Wilson is a packager first, so what you buy is the integration as much as the engine.
Because FG Wilson sources engines from two families, the enclosure is designed once and then qualified against both. We build these sets to the factory configuration and keep the original control philosophy, which matters if the customer later needs dealer support. Small P-series units ship as canopies; larger units are containerised or open, following the FG Wilson build sheet.
| Typical power range | 10 – 4,000 kVA |
|---|---|
| Enclosure | Galvanised acoustic canopy |
| Ingress protection | IP54 |
| Best suited to | P-series 10–200 kVA for rental and commercial standby |
| Typical power range | Up to 4,000 kVA |
|---|---|
| Enclosure | 10 / 20 / 30 / 40 / 45 ft container |
| Ingress protection | IP54 (IP55 optional) |
| Best suited to | P500 and above for plant and data centre work |
| Typical power range | 10 – 4,000 kVA |
|---|---|
| Enclosure | None — open skid |
| Ingress protection | IP21 (control panel IP54 optional) |
| Best suited to | Plant-room installations matching the original factory build |
Already running a FG Wilson set?
FG Wilson control modules, ATS panels, canopy doors and the Perkins or CAT service parts behind them are all available, with the original part numbers retained.
FG Wilson sets, answered plainly
The three things buyers ask us most about this engine platform.
Caterpillar, since 1999. That is why larger FG Wilson sets often use Cat engines while smaller units use Perkins.
Emergency Standby Power: one hour in twelve, no overload. It is not a continuous rating and should not be used for prime power sizing.
Many service parts are common to the Perkins or Cat engine and available through independent suppliers. Control modules and canopy parts usually require the distributor.