The Blue Star GM60-02 is a 60-kilowatt natural gas and LP standby generator powered by the PSI 5.7L NA — an eight-cylinder V8 naturally aspirated engine from Power Solutions International. It is rated at 60 kWe standby on both natural gas and LP across all voltage configurations from 120/240V single-phase through 347/600V three-phase.
Blue Star Power Systems pairs the 5.7L engine with a Stamford UCI224E alternator and DSE DCP7310 controller on a formed steel base. The OPU footprint is 80 × 38 × 52 in at 1,900 lbs — the same length and width as the GM50-03, sharing the PSI 5.7L V8 platform. Level 1, 2, and 3 enclosures are available with sound levels from 79 dBA (OPU full load) down to 64 dBA (Level 3).
The GM60-02 and GM50-03 use the same PSI 5.7L V8 engine and the same 80 × 38 in OPU footprint. The 10 kWe gain from 50 to 60 kWe comes from a higher fuel delivery calibration rather than a different engine. This makes the two models footprint-compatible and parts-common — a useful consideration when selecting between them based on load requirements. The tradeoff is that the GM60-02 runs the engine closer to its output ceiling, which results in a more restrictive deration profile (1,200 ft vs. 4,200 ft altitude threshold).
The GM60-02 is a standby-rated unit. For continuous or unlimited-hours operation, the GM60-02P is the correct selection at 55 kWe prime. The GM60-02P includes a catalyst/silencer and 105°C prime temperature rise. Do not use the GM60-02 standby rating for base load, peak shaving, or off-grid prime power applications.
The PSI 5.7L at 60 kWe operates closer to its output ceiling than the GM50-03 at 50 kWe — verify fuel supply at commissioning. At 773 ft³/hr NG at 11.0 in. W.C., the supply regulator and meter sizing must be confirmed before startup. Temperature and altitude deration applies starting at 77°F and 1,200 ft — sites in warm climates or at moderate elevation should calculate derated output. Annual full-load testing and spark plug inspection remain the top maintenance priorities for naturally aspirated gaseous standby units of this type.
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Adjust load percent and tank size to estimate runtime. Pre-filled with this model's spec where available.
Estimate runtime on this tank
Fuel demand at 75% load
630,000 BTU/hr≈ 630.0 cf/min @ 1,000 BTU/cf
On utility natural gas the runtime is generally unlimited provided the supply line and meter can deliver this BTU/hr at the engine's required inlet pressure (typically 5–14" WC residential, up to 5 psi commercial). Confirm against the OEM's published fuel-pressure spec.
Service intervals
Manufacturer-recommended intervals for the Blue Star GM60-02 under standby duty. Field intervals may differ based on load profile, ambient conditions, and fuel quality.
Oil & filter
Every 250 hours or 12 months
Coolant change
Every 4000 hours
Air filter
Every 1000 hours
Spark plugs
Every 1500 hours
Major overhaul
≈ 15,000 hours
Load bank test
Every 12 months
Common failure modes
What we've seen fail on this platform. Use as a service-planning reference, not a diagnostic — actual failure modes depend heavily on duty cycle and maintenance history.
Component
Symptom
Typical hours
Severity
Spark plugs / ignition
Misfire under load, hard starting
1,500+
minor
Battery
Failed to start during outage
8,760+
minor
Coolant system
Overtemp, coolant loss
6,000+
minor
Frequently Asked Questions
What engine does the GM60-02 use?
The PSI 5.7L NA — an eight-cylinder V8 naturally aspirated engine from Power Solutions International, displacing 350 cubic inches (5.70 liters). At 1800 RPM, it produces 113 hp (84.3 kWm) standby — the same rating as the GM50-03. The GM60-02 extracts 60 kWe from the same engine block through a higher fuel delivery calibration than the GM50-03's 50 kWe tune. Both natural gas and LP outputs are equal at 60 kWe across all voltage configurations. Deration applies at 1% per 10°F above 77°F inlet air temperature and 3% per 1,000 ft above 1,200 ft altitude.
What is the GM60-02P prime variant and when should I specify it instead?
The GM60-02P is a prime-rated companion at 55 kWe continuous variable load, using the same PSI 5.7L V8 engine. It includes a three-way catalyst/silencer, 105°C temperature rise, a 1-year / 1,500-hour prime warranty, and a wider OPU footprint (80 × 42 × 64 in vs. 80 × 38 × 52 in) for the catalyst assembly. Specify the GM60-02 for emergency standby; specify the GM60-02P for any application requiring continuous or unlimited-hours operation. Do not use the GM60-02 standby rating for prime power service.
How does the GM60-02 compare to the GM50-03 on the same engine platform?
The GM60-02 and GM50-03 share the PSI 5.7L V8 engine and the same 80 × 38 in OPU footprint, but the GM60-02 produces 10 kWe more at the cost of a less favorable deration profile. The GM50-03 derates only for altitude above 4,200 ft (no temperature deration); the GM60-02 begins altitude deration at 1,200 ft and also derates for temperature above 77°F. The GM60-02 is 100 lbs heavier (1,900 vs. 1,800 lbs) and consumes 37 ft³/hr more NG at full load (773 vs. 736). For high-altitude sites where full output is required, the GM50-03's deration advantage may be the deciding factor.
What are the fuel consumption rates for the GM60-02?
At 100% standby load, the GM60-02 consumes 773 ft³/hr of natural gas or 339 ft³/hr of LP. At 75% load: 663 ft³/hr NG or 258 ft³/hr LP. At 50% load: 545 ft³/hr NG or 213 ft³/hr LP. Required inlet pressure is 11.0 in. W.C. at a 1.0-inch NPT connection. Heat rejected to the coolant circuit at full load is 187,200 BTU/hr; heat radiated to the enclosure or room is 48,120 BTU/hr. Combustion air draw is 173 CFM; ventilation air requirement is 7,400 CFM for a radiator-cooled installation.
55 kW prime / 60 kW standby natural gas / LP generator from Blue Star Power Systems. PSI 5.7L eight-cylinder V8 with catalyst/silencer, Stamford UCI224E alternator, DSE DCP7310 controller, 208-600V output.
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