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generac generator Kohler
Has anyone compared the Generac GP generators vs the XG genertors?
I'm comparing the GP 6500 with 389 cc engine (splash lubrication) to the
XG 6500 with a 410 cc industrial engine (oil pump pump lubrication).
I would be using it for home emergency use, so I doubt I really need the industrial engine with oil pump. Over 10 years it will probably only get 100 hours on the engine mostly at a consistent 50% load with occasional short term peaks closer to max (toaster, sump pump coffee pot, etc). So I'm leaning towards the cheaper GP. But want to consider the following:
Are they both easy to pull start?
The biggest engine I pull start is my snowblower with a 250cc OHV Briggs. But when starting only the engine is turned, i.e. it's not engaged to the snowblower yet. The hardest thing I have to start is my power washer with a 160cc OHV Kohler. I think because it's directly connected to the pump which makes it harder to start.
Is the XG industrial engine quieter than the GP engine?
I always tell people to make sure the electrical equipment that will be provided electric power by the generator is electrically shut off before you start the generator. This is much like starting a car in neutral. Trying to start the generator under load is like trying to start a car while it is in gear - it takes a lot more to start it. Having said that, I do not believe the additional 21 cc displacement (5 % difference in displacement) would be harder to start.
The industrial engine will perform more reliably especially under a long run. If you know the electrical outage will run about 1 - 2 hours, the more reliable long term runner is not substantial. However, if the outage runs for 24 or more hours, the splash lubricated non-industrial engine may be stressed and failed. Should this happen, it may be impossible to get it repaired while the electric feed is still out. Can you predict the duration of the outage?
If you need reliable emergency electrical energy, you are probably best served by a more reliable generator. If you can live with an unreliable emergency electrical energy supply, you may ask yourself why you need any emergency energy supply. I have seen generators fail after 12 - 24 hours continual use, even when run at 50% nameplate capacity demand.
Industrial engines are better built, run cooler, and run quieter as a general rule. Further they will run a lot longer durations and for more years. This is one reason they cost more.
Keep in mind is that inductive loads (e.g. motors) draw a lot more to start than they draw once running. A motor that draws 4 amps at 240 v AC can easily draw 8 - 10 amps to start. This is quite a load for a generator.
I strongly suggest you use synthetic engine oil in a generator. These oils take the extreme operating conditions with less breakdown - and you do not want to change oil during an outage. These oils also do not have the major viscosity increase in cold weather which means an engine with synthetic oil of the proper multigrade for the engine will be a lot easier to start in cold weather than will the same engine with non-synthetic oil in it.
Finally since there will be long periods when the engine is not used (because the utility provided electricity is working), you should, after each use, service the engine properly and prepare it for long term lay-up as the engine manual recommends. You can have a generator idle for many months and if you do not lay it up properly corrosion inside the cylinder walls will set in and this can be a major problem that will inhibit or prevent start up when you need it most. Do the preventative maintenance steps each time.
How a Automatic generator works.
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