Florida generator guide

Two 'Identical' Generators, One Quiet Maintenance Bill — It's Hiding in the Valves

Updated October 11, 2026

Picture two home generators sitting side by side in a driveway. Same output on the label, same warranty sticker, same app on your phone. One of them will quietly ask for a mechanic with a metal gauge every so often for the next twenty years. The other won't — and almost nobody tells you which is which before you sign.

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About five minutes. No salesman, no all-day window.

The one part that decides whether a mechanic keeps coming back

Inside every one of these engines, small parts called lifters sit between the camshaft and the valves. They hold a tiny gap open and closed as the engine runs. That gap matters more than it sounds — let it drift too wide or too tight and the engine runs rough, loses power, or chews itself up early.

Here's the split most buyers never see. Kohler's air-cooled engines use hydraulic lifters. They ride on a cushion of oil and reset that gap themselves, every single time the engine runs. Nobody has to touch them.

A lot of competing air-cooled engines — Generac's, for one — use solid lifters instead. Those don't self-correct. The gap wanders as the engine wears, and a trained tech has to kneel down, pull the valve covers, and set it by hand with a feeler gauge about as thick as a matchbook cover. On a schedule. For as long as you own the thing.

Why it never comes up when you're shopping

Spec sheets are built to look the same. Same wattage, same transfer switch, same Wi-Fi monitoring. Valve service doesn't show up in that column, because it isn't a feature you'd brag about — it's a chore that shows up years later.

And here's the part that catches Florida owners specifically. That valve check isn't due on your calendar. It's due on run hours. Up north, a standby unit might log a few hours a year just exercising itself. Down here, one bad storm season rewrites the math.

There's a guy in the comments under one of these generator videos who ran his Kohler for ten days straight after Hurricane Ian, only shutting it off to check the oil. Ten days straight is a normal year's worth of running crammed into a week and a half. On a solid-lifter engine, hours like that are exactly what pulls the valve service around.

What it actually costs you — and the part that isn't about money

When the valve service comes due, it's a tech on his knees at your unit with gauges, usually tacked onto a routine oil-and-filter visit. Not a disaster on any single day. But it's a line item that comes back, over and over, for the life of the generator. On a self-adjusting engine, that line item simply never appears.

The strange thing is, the brand on the box matters less than you'd guess. The most-liked comment under one of these comparison videos wasn't about Kohler or Generac at all. It was somebody practically begging for a real person who's worked on both to just say which one they'd put in their own house. Another one, four words long: only as good as the people who serve it.

So the valve question folds into a bigger one. Who's going to be kneeling in your driveway in year six? And did anyone put that in the quote?

Before you compare a single price

Most quotes you'll get are a number for the generator and a shrug about everything after it. The sizing, the gas line, the transfer switch, the years of service — that's where the real cost of owning one of these actually lives, and it's different for every house on every street.

So instead of a sticker price on a box, GENERasic gives you one committed installed price for your exact address. The unit, the install, all of it, tied to your specific home and hookup — not a moving target that grows once a truck shows up.

Punch in your address, get the one number that tells you what this really costs at your house. Then you can go argue about valves.

Common questions

Do all home standby generators need valve adjustments?

No — it depends on the engine inside. Engines with hydraulic lifters adjust themselves and never need it. Engines with solid lifters do. Kohler's air-cooled units use hydraulic lifters; some competing air-cooled units, including certain Generac models, use solid lifters that need periodic adjustment. Two generators can look identical and give you opposite answers.

How often does a valve adjustment actually come due?

On engines that need it, there's usually a first check right after the break-in period, then it repeats based on run hours rather than the calendar. Your model's manual spells out the exact interval. The key thing to hold onto: it's counted in hours, not years — so a generator that runs hard reaches it faster.

I run my generator a lot during hurricane season. Does that change anything?

Yes, and more than most people expect. Valve service is tied to run hours, and a single multi-day outage can stack up as many hours as a year or two of routine weekly exercising. If your engine has solid lifters, heavy storm-season running drags that service date closer. A self-adjusting engine doesn't care how long the lights were out.

Does a Kohler really never need a valve adjustment?

On its air-cooled home standby engines, the hydraulic lifters are designed to hold the valve gap on their own, so there's no scheduled valve adjustment — the manufacturer's own materials say the hydraulic lifters eliminate it. You've still got the normal upkeep: oil, filter, battery, a spark plug now and then. It's the valve chore specifically that drops off your list.

Which generator would a technician put in their own house?

That's the exact question homeowners keep asking in the comments, and there's no one-size answer — techs tend to trust whatever brand their local service network knows cold. Which is really the whole point: the brand matters less than who's maintaining it. A generator is only as good as the people who actually show up to service it.

Stop reading ranges. Get your number.

GENERasic pulls the real property, flood, and elevation data for your exact address and returns one all-in installed price — sized to your home, your fuel, and your flood elevation. The vetted local installer confirms it on site.

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