Blue Star Power Systems · Gaseous Product Line (PSI 5.7L)
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Blue Star GM60-02P
60 kW standby / 55 kW prime · Natural Gas / LPG · Liquid-cooled
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.
The Blue Star GM60-02P is a 55-kilowatt prime / 60-kilowatt standby natural gas and LP generator powered by the PSI 5.7L NA — an eight-cylinder V8 naturally aspirated engine from Power Solutions International, configured for continuous prime power service. The "-P" designation identifies this as a prime-rated model with three-way catalyst/silencer, 105°C temperature rise, and a 1-year / 1,500-hour prime warranty.
Blue Star Power Systems pairs the 5.7L engine with a Stamford UCI224E alternator and DSE DCP7310 controller. The OPU footprint is 80 × 42 × 64 in at 2,025 lbs — 4 inches wider and 12 inches taller than the GM60-02 OPU to accommodate the catalyst/silencer and prime-duty components. Level 1 through Level 3 enclosures are available.
Prime Rating: Size to 55 kWe for Continuous Operation#
The GM60-02P carries two ratings: 55 kWe prime and 60 kWe standby. For any application involving continuous or unlimited-hours operation — base load, peak shaving, prime power in isolated sites — the 55 kWe prime rating governs. The 60 kWe standby rating applies to emergency backup use only.
This 5 kWe spread (from 60 kWe standby to 55 kWe prime) is consistent across Blue Star's prime gaseous product line, reflecting the thermal derating required for sustained operation vs. short-duration emergency standby. Do not size a continuous-duty load requirement to the 60 kWe standby figure.
The GM60-02P's three-way catalyst/silencer is the key distinction from the standby GM60-02. The catalyst oxidizes CO and unburned hydrocarbons and reduces NOx — required for EPA stationary spark ignition compliance at the continuous operating hours that prime power applications accumulate. All Blue Star prime-rated gaseous generators include this assembly. Its presence also affects the OPU footprint and the exhaust connection dimensions; confirm both before installation.
Prime-duty gaseous generators accumulate hours continuously and require disciplined PM intervals. The PSI 5.7L at 55 kWe prime is a reliable platform when maintained properly: catalyst inspection, spark plug replacement at OEM intervals, coolant condition, fuel pressure verification at full load (709 ft³/hr NG at 11.0 in. W.C.), and air filter maintenance. The OPU's 64-inch height with the catalyst assembly requires clearance planning above the unit — confirm overhead clearance at the installation site before delivery.
Tell us about the application — kW, voltage, application, install timeline — and we'll respond within one business day with budgetary pricing, lead time, and any sizing notes.
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 GM60-02P 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 is the difference between the GM60-02P prime rating and the GM60-02 standby rating?
The GM60-02P is rated at 55 kWe prime (continuous variable load, unlimited hours) and 60 kWe standby. The companion GM60-02 is rated at 60 kWe standby only. The prime rating reflects the PSI 5.7L V8's continuous thermal limit at 105°C temperature rise — the standby 125°C rise is acceptable only for short emergency durations. The GM60-02P carries a 1-year / 1,500-hour prime warranty. Both use the same Stamford UCI224E alternator; the prime model's OPU is wider (80 × 42 vs. 80 × 38 in) and taller (64 vs. 52 in) to accommodate the catalyst/silencer assembly.
Why does the GM60-02P have higher radiated heat than the GM60-02 despite lower prime output?
The GM60-02P radiated heat of 44,040 BTU/hr is lower than the GM60-02's 48,120 BTU/hr — not higher. The prime model runs at 55 kWe vs. 60 kWe standby, which reduces the output slightly, but the continuous-duty thermal cycle means less heat escapes through short bursts and more consistent heat flow. The catalyst/silencer also modifies the exhaust heat balance. Coolant heat rejection is identical at 187,200 BTU/hr because both models use the same engine; the difference lies in radiated heat from the enclosure and exhaust path.
What is the catalyst/silencer on the GM60-02P and what maintenance does it require?
The GM60-02P includes a three-way catalytic converter/silencer, factory-mounted, that oxidizes CO and hydrocarbons and reduces NOx to EPA stationary spark ignition standards for continuous-duty service hours. This is standard equipment on all Blue Star prime-rated gaseous models (-P suffix). The catalyst requires periodic inspection and replacement at PSI-specified intervals — typically monitored by operating hours and exhaust back-pressure measurement. Do not substitute a standard critical-grade silencer — the catalyst is required for EPA prime power compliance and affects the exhaust system back-pressure specification.
What are the fuel consumption rates for the GM60-02P at prime output?
At 100% prime load (55 kWe), the GM60-02P consumes 709 ft³/hr of natural gas or 311 ft³/hr of LP. At 75% prime load: 608 ft³/hr NG or 236 ft³/hr LP. At 50% prime load: 502 ft³/hr NG or 196 ft³/hr LP. These are lower than the GM60-02 standby values (773/663/545 NG) because prime output is 55 kWe rather than 60 kWe. Required inlet pressure is 11.0 in. W.C. Heat rejected to coolant at full prime load is 187,200 BTU/hr; heat radiated to the room is 44,040 BTU/hr. Combustion air is 173 CFM; ventilation requirement is 7,400 CFM.
35 kW prime / 40 kW standby natural gas / LP generator from Blue Star Power Systems. PSI 4.3L six-cylinder V6 engine with catalyst/silencer, Stamford UCI224C alternator, DSE DCP7310 controller, 208-600V output.
