Question about Porter Cable 10,000 Watt 20 Hp Portable Generator #H1000IS W...

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Idle control inop

#1 - idle control (demand sensing circuit wont decrease rpm to idle with no load)
#2 - engine kill switch inop

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  • tom1652 Nov 23, 2008

    Same problem - kill switch does not work - no load idle does not work -

    engine hunts periodically.

    Any ideas? My guess is the circuit board which runs about $175.


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Check the small relays first, lightly tapping on them wile on may tell you the one that is bad but not all ways , if thats not it,Pull the circuit board and test or have a old tv repairman test the Diode's/resistor's on the board, if you find a bad one and do not know how to read the rating, take a digital close up picture of it and email it to one of many people selling diodes or resistor's on Ebay, buy it , solder it in.

Posted on Feb 05, 2009

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Idle control comes into play when there is no power draw forcing the engine to idle with an electro magent. If you feel that the electro magnet is interfering with governor, temp remove the wire to the solenoid. Usually the idle control will not effect how the engine /gen output power. An overloaded condition will cause the engine the go the full throttle as the internal governor of the engine will try to maintain 3600 rpm. Overloaded condition will greatly shorten the life of the generator/engine. Try to use only about 80 % of rated power. Large motors can draw three times running amps. A compressor using 12 to 18 amps to run can draw over 40 amps to start.
If your generator could handle the load in the past, check the engine for loss of power, or the generator for faulty voltage regulator or capacitors out of range. Easy to check. Connect digital volt meter to plug /load and look at volt reading while running with no load and loaded. Voltage should stay between 110 to 120 under load and with no load (unless goes into idle mode). Good luck

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This is for the Porter Cable H650IS-W-1 Contractor Generator. It has an idle/RPM control solenoid that adjusts to the load on the generator. I can see that the solenoid works because 9VDC applied to it...

I do not think that your generator has a voltage regulator. The solenoid is for idle only when there is no demand (power being used). You can verify this by examing the governor spring /tension adjuster on the engine. Idle control switch on panel and the assembly board control the solenoid. When the assembly board fails generally the generator will function the same however there will be no idle. I have checked with Dewalt and parts are available however expensive. If idle is the only problem you may consider ignoring issue. If there is another problem with gen. please email.

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My generator is not putting out the proper voltage? it's only putting out approx 75 volts on the 120 volt circit. i adjust the idle to full out and i get approx 112v.

Most low voltage conditions on generators are simply due to a low engine rpm. Most modern generators are 2- pole windings. So your engine rpm should theoretically run @ 3600 rpm. which will produce 120/240 volts @ 60 HZ. In actuality You want to set your rpm's @ Approx. 3720rpm no load. About 62.5 Hz. Without getting to technical this will give you your desired 120/240 volts loaded. Hope this helps.

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My yamaha 2400 gen.does not run smooth at idle, but under a load it runs fine.

I'm not quite sure if your issue may relate to most inverter and auto-load sensing generators or some gas-powered equipment.
Most power cutters/grinders such as Stihl or Husqvarna, specially the higher cc models do sound crappy without load, you'd think there's something wrong with it from day 1. This is normal. Well, some of these machines lack the load sensing capability thus does not adjust throttle variably according to load.
Modern generators, specially the inverter ones along the 1000 to 3000 watt range where the Yamaha 2400 falls into category, have a switch where you can choose to let the unit sense and adjust throttle according to load. If this is off, the unit might sound like its not running smoothly on idle. Depending on you, this can be alarming or not. On a Honda EU2000is, for example, it is noticeable when the auto-load sensing button is off but not be like its choking or sputtering.
Anyhow if it is idling roughly, I can only come up with 2 possible causes, if I may suggest:
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2.) throttle adjustment might be necessary. At most Yamaha servicing dealers, it is included when you have a carburetor tune-up. They will check the diaphragm for blockage or holes, gaskets for leaks and filters, well, the entire integrity of your carburetor. This resolves most rough idling issues.
I know it would probably save you at least $65.00 if you have to check this yourself and buy the spare parts. However, going to a servicing dealer may be the best solution but always be sure the repairs are warratied. Hope this helps.

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My generator does not throttle up automatically

Hi there,
I've posted an answer to a somewhat related problem here
but you should read that later as I think you want a better idea of how the whole thing works.

Inside the control box on the generator the power leads get connected so that we have an L1, L2, and N feed wire with L1 and L2 being the 2 "hot" wires. Both of the hot wires pass thru a small current transformer (one wire in each direction) and then go to the various outlets in the output panel. The current transformer makes a signal whenever current is drawn thru either wire.

The current transformer sends its signal to an idle control circuit on a printed circuit board inside the control box. The other wires from this board go to the idle control switch, the power regulator/exciter board, and the idle control solenoid. The idle control board uses the DC voltage it gets from the regulator/exciter to energize the idle control solenoid if the idle control switch isn't in the "off" position and no signal has come from the current transformer for a sufficient time. The idle control solenoid acts to pull the throttle assembly until the throttle bell crank hits the idle adjustment screw (whew!)

Troubleshoot it like this:
1 - Does the engine start at governed speed and then idle down or does it start at idle? If it starts at idle, or seems to idle down faster than usual, something might be amiss in the works.

2 - When you turn the idle control switch to "off" does the engine rev up to governed speed immediately? If not there is almost certainly something ugly going on.

3 - With the idle control solenoid unplugged from the idle control board does the engine rev up to governed speed? If it won't you need to check to see if the plunger is stuck on the idle control solenoid. Some solenoids also have an adjustment that can get loose, check the voltage on the wires coming out of the idle control board if you're in doubt about its being energized or not.

4 - If the generator revs up when you turn the idle control off, but won't do it automatically when current is drawn with it turned on you need to check the current transformer with an ohm meter. Even though this is an AC signal you should mark the leads when you take them off so that they go back from whence they came - it's a noise thing ;-) Little square current transformers in Coleman Powermates are usually somewhere in the 1 - 2 Kohm range, failures are typically that the coil opens up.

Rank me when you've completed repairs?

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