Engine hours, alternator condition, and control system health determine whether a generator is ready to work or ready for a rebuild. Know before you buy.
Generators sit idle for long periods, then run hard when needed most. That duty cycle causes hidden problems — corroded windings, fuel system issues, worn engines, and failing controls. A generator that starts doesn't mean it's ready for prime time.
Worn bearings, damaged windings, and failing voltage regulators. Alternator rebuilds run $5,000–$20,000 depending on kW rating.
Carbon buildup, injector failures, cooling issues, and blow-by from wet stacking or low-load operation. Repairs range $3,000–$15,000.
Contaminated fuel, deteriorated lines, failed transfer pumps, and clogged filters from sitting idle. Repairs cost $1,000–$5,000.
Faulty controllers, bad sensors, and wiring problems cause starting failures and improper operation. Repairs range $1,500–$8,000.
Clogged radiators, failed water pumps, and deteriorated hoses cause overheating under load. Repairs cost $1,500–$6,000.
Failed contacts, faulty controls, and improper operation. Repairs or replacement run $2,000–$10,000.
This is what repairs cost when issues go undetected. Our inspection is just $800.
Generator Inspection Checklist
Our inspectors perform a comprehensive generator evaluation — checking the engine, alternator, control system, fuel system, and all supporting components under load when possible.
Your Inspection Report Includes
30-45 high-resolution photos covering engine, alternator, control panel, fuel system, cooling system, electrical connections, enclosure, and any problem areas found.
Written summary with Good/Fair/Poor ratings for engine, alternator, controls, and all major systems. Includes load test results if performed and clear identification of issues.
Video footage of the generator starting, running, and operating under load if possible. See and hear exactly how the unit performs.
Simple 3-Step Process
Send us the generator details (make, model, serial number, kW rating) and location. We coordinate with the seller to schedule the inspection.
Our inspector performs a thorough evaluation — testing engine, alternator, and controls while documenting everything with photos and video.
Receive your detailed inspection report via email within 24 hours. Know exactly what you're buying before you commit.
Generator Inspection FAQs
Most generator inspections take 2-3 hours. Larger units (500kW+) or inspections with load bank testing may take longer.
We inspect all major brands including Caterpillar, Cummins, Kohler, Generac, MTU, John Deere, Wacker Neuson, and Multiquip. Diesel, natural gas, and bi-fuel units.
When a load bank is available on-site, we perform load testing to verify output and stability. We can also coordinate load bank rental if needed — contact us for details.
We inspect all sizes — from portable 10kW units to large 2000kW+ prime power generators. Towable, skid-mounted, and containerized configurations.
We perform visual inspection and check for bearing noise and temperature. Insulation resistance (megger) testing can be performed if equipment is available on-site.
We check for carbon buildup, oil residue at exhaust, and engine performance. Wet stacking from chronic low-load operation causes long-term damage that's often hidden.
If a transfer switch is included with the generator, we inspect contacts, controls, and test operation. Transfer switch condition is critical for standby power applications.
Yes. We regularly inspect generators at facilities, construction sites, and dealer locations. We coordinate with site requirements and can work around operational schedules.
The IronCheck Difference
We're not affiliated with dealers or sellers. Our only job is to give you the truth about the equipment's condition.
Our inspectors have hands-on experience in the equipment industry — we know what to look for and where problems hide.
We inspect equipment across all 50 states. Wherever the machine is located, we can get an inspector on-site.
Most inspections are scheduled within 24-48 hours, with your report delivered the same day or next business day.
Generators are only valuable when they run. A worn alternator, tired engine, or faulty controls can leave you in the dark. Get the facts before you buy.