A standby generator that sits untouched for years is not a backup plan — it is a gamble. The whole point of owning one is that it fires up without hesitation the moment the grid goes down, and that only happens when the unit has been properly looked after. Generator Maintenance & Repairs is something JMR Electric takes seriously, because we have seen firsthand what a neglected generator looks like when a nor’easter rolls through Stoneham and a family needs heat at midnight.
Whether your generator ran through heavy use last winter or has been sitting quietly on the pad for a couple of seasons, it needs attention before the next outage finds you. Our licensed electricians service and repair standby and portable generators of all major brands — Generac, Kohler, Briggs & Stratton, Cummins, and more. We come to you, work through a full inspection checklist, and tell you exactly what we find — no upselling, no unnecessary parts.
A lot of homeowners picture a generator tune-up as a quick look-over, but a proper annual service goes much deeper than that. Our technicians change the engine oil and oil filter, inspect and replace spark plugs as needed, clean or swap out the air filter, test and load the battery, check coolant levels on liquid-cooled units, inspect the fuel lines and connections for cracks or corrosion, and run a full load test to confirm the unit can carry real power under pressure. Stoneham homeowners who schedule this once a year are the ones who make it through winter outages without a hitch — the ones who skip it are the ones calling us in a panic at 9 p.m. on a February night.
Annual maintenance keeps most problems from happening in the first place, but generators do break down — especially older units or ones that have been pushed hard. Common repair calls we get include units that crank but will not stay running, generators tripping their breakers under load, voltage fluctuations that damage connected appliances, automatic transfer switches that fail to kick over, and fuel system issues from stale gas sitting in the carburetor. We diagnose the actual cause rather than just replacing parts until something works.
Our technicians carry common replacement parts on the van, which means many repairs are wrapped up in a single visit. JMR Electric works on units from any installer — you do not need to have purchased your generator from us to get it serviced or fixed by our team.
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Common questions from Stoneham, MA homeowners about generator installation and backup power
Once a year is the standard recommendation for most standby generators — typically timed right before storm season kicks in, either in late summer or early fall. That annual visit covers oil and filter changes, spark plug inspection, battery testing, air filter cleaning or replacement, and a full load test. Generators that run for extended periods during major outages may need a mid-year oil change as well, since the engine accumulates hours fast when it is working hard for multiple days in a row. Your owner’s manual will list the specific hour-based intervals that apply to your model.
A proper tune-up goes beyond a quick visual check. Our service visits include an engine oil and filter change, spark plug inspection and replacement if worn, air filter cleaning or swap, fuel filter check, battery load test and terminal cleaning, coolant inspection on liquid-cooled models, a check of all electrical connections and transfer switch contacts, and a live load test that confirms the generator can carry real wattage without tripping or faulting. We also check the exercise mode schedule to make sure the unit is running its weekly self-test correctly. You get a written summary of everything we found and everything we did.
Absolutely. We service generators regardless of who installed them or where the unit was purchased. Whether you have a Generac, Kohler, Briggs & Stratton, Cummins, or another brand, our technicians are familiar with the common maintenance requirements and failure points across all major models. You do not need a service contract with the original installer to get quality maintenance from us — just give us a call and we will schedule a time that works for you.
It is never too late to get caught up, though a generator that has gone multiple years without service may need more than just a standard tune-up. Old engine oil turns acidic and can damage internal components over time. Stale fuel leaves varnish deposits in the carburetor. A battery that has never been load tested may be holding barely enough charge to start the engine. We do a thorough assessment on the first visit so you know exactly where things stand — what is fine, what needs attention now, and what can wait. Getting back on a regular schedule from that point forward is what matters.
Serving a wide area around Greater Boston, we focus on delivering high-quality electrical solutions in a timely manner.
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