Question about Coleman Powermate Premium Plus 6250W Portable Generator

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Can the Coleman Powermate Premium Plus 6250W with Briggs 10 hp OHV engine be used to power house hold appliances, tv's or computers w/surge protection with out fear of damage to the item being power up, as long as it's within the rating of the gen? I was told it had to much of a current flux by a salesman of reconditioned generators to be used for home use, it was for construction use only. I thought most of the Coleman gens had 3% or less flux on the hz.

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I have the same generator, and I have learned a lot about it. I talked to a teck who works on them. He told me that they come from the factory set to too high of an RPM. He said to run for about two hours and then at 1/2 load set the RPM to produce 60 HZ. The extra RPMs are real rough on them.

There are three ways to do this. You can use a frequency meter if you have one. Some frequency meters will require you to build a simple resistor divider or use a small transformer to reduce line voltage to a few volts. You might also require a simple RC filter. You could use a tack on the motor, or you could conect a clock that has a 120 AC motor (dial display type) to the generator. Compare the clock to a digital watch. The clock will either be slow, right on, or fast depending on the frequency of the generator.

The spring that controls the sensitivy of the govenor often requires an initial adjustment on these generators when they are new. If the RPMs are unsteady, goes up and down when the unit is lightly loded after runing under a decent load, then adjust the mount point for the spring by the carb linkage next to the fins on the motor, this is between the electric generator and the motor and higher than the generator. Once you get the spring adjusted so that the RPMs are steady regardless of load you should not have to mess with it again.

Once you get the govenor spring adjusted, and the frequency set to 60 HZ you should be able to run anything from this generator (TV, computer, what ever), as long as you stay below the maximum toal power.

Be careful not to apply more than 1/2 of maximum load to each side of the two 120 volts of the 240 volts. If you do not understand that last statement get someone who knows electricity to explain it to you.

Be aware that motors draw several times more than running wattage when they start. Microwave ovens draw huge amount of power when they start.

Try not to go above 4000 watts for long periods of time. The plastic on the back of these electric generators tends to melt.

If you are going to load this above 1/2 load on a hot day, have a big box fan blow on the motor and electric generator. Note the front of the motor by the pull roap has a fan behind the black housing. This fan takes in air and blows it out over the fins of the motor towards the electric generator. Do not have the box fan fight this direction of air flow. Have it blow at a diagnal from the front of the motor opisite the side for the air cleaner, by the housing for the fan, and also onto the electric generator.

These generators are very noisy so do use ear protection perferably both plugs and over the ear at the same time when you are near them.

To keap this generator reliable run it for at least 10 minutes every 4 months. Use only Castrol HD 30 oil if the temperature is above 40 F and only Castrol 0W-30 european formula "made in Germany" for temperatures below 40 F, If the temp. is going to go above and below 40 F use the 0W-30. The Castrol 0W-30 must say "made in Germany" on the back of the bottle. Look two lines above the bar code. Change the oil once a year or every 25 hours of use.

These air cooled motors that do not have an oil pump and do not have an oil filter are real rough and demanding on the oil. There are very few oils that can provide the protection these motors require.

After you run it let it cool. Only after it cools, drain all the gas from the tank. Run the carb dry (until the unit stops). Pull the spark plug and spray Sta-Bil foaming oil into spark plug hole. Put a clean rag over spark plug hole and pull roap several times. Replace plug, pull roap lightly until resistance of the begining of a compression stroke is felt. Both valves will be closed. This protects valve springs, and insures no condensation in cylinder. Store indoor in a heated location. You might want to remove the gas tank and let it air out in an outdoor garage for a month or so, so no smell of gas gets into the house.

Never run a generator in a building. Carbon monoxide has no smell and will kill.

If you want to learn more go to

Posted on Aug 27, 2009

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I agree home appliances are petty tough. Just don't bog it down with too much stuff when you're using the computer.

Posted on Jul 30, 2009

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I have not had a problem powering tv's or computers with all three of my different generators. One is a Kubota, another is a Craftsman (Generac), and the third is a very small Yamaha. Of course, you would want to start your generator and run it for a minute or two before you draw current from it.

Posted on Jul 25, 2009

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