I have Porter Cable #H1000IS and the idle rocker switch will not work to idle the engine down. Help me

not car
is a
Porter Cable PCB370SS (Type 1) 16" Scroll saw

Have you checked the oil level? Some newer ones have an auto-shutdown feature if it detects a low oil level.

The idle control switch allows the generator to go into idle when there is no demand form the appliances connected. This saves gas and increases the life of the generator. Damage can occur for some appliances like a refrigerator/freezer because the voltage and frequency are not prepared for the load resulting in a low voltage bad startup that will damage the appliance. Suggest that you leave the idle control switch off while any motor/electronic devices are connected.

The throttle control is likely a choke function for starting. These generators are designed for only one running speed to produce the necessary 60 cycles per second and voltage.
The following link is to a Canadian web site that later in the detail report describes the concern of idle control. In addition it provides good insight to the operation and use of portable generators

Hope this helps?
Understanding Portable Generators

The user manual see pages:
http://www.mikestools.com/download/Porter-Cable-Manuals/Porter-Cable-CTE300.pdf

Check for a blown fuse or any loose wires

high idle screw or governer

called hunting. Adjust the air fuel ratio crew until it stabilizes, The tur idle to specs.

Why generators do not generate electricity

1. Fault phenomenon

When the generator set speed reaches the rated speed, the AC exciter stator excitation circuit switch is closed and the voltage regulator is adjusted to the maximum value when the generator speed reaches the rated speed.

2. failure cause
The generator core remanence disappears or is too weak, the newly installed unit is disturbed by long-distance transportation or the generator is placed for too long, the generator core remanence disappears or the remanence inductance is weak, which results in the generator remanence voltage vanishing or less than the normal remanence voltage value.

You have a simple problem and it has nothing to do with the octane, honda's love better gas, thats all I use in all my equipment and even my 4000 psi pressure washer runs better and cooler with higher more efficient octane, Your problem is in the carb, clean and service it, make sure the air breather is clean (soap and water only if it is a foam unit and do not spray it with any oil) then check for water in the gas by draining the tank into a large clear glass container 1/2 gal at a time. and after all this is done and needs to be done anyway, change the spark plug run the unit and make sure the throttle up solenoid is adjusted properly or even working if this unit is equipped with one. good luck

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.