Question about Honda Electrical Supplies
Is there a load sensor that controls engine speed when it is under load? Engine idles just fine but does not rev up under load. If the engine is revved up manually it will generate power. This unit is almost new and I don't want to tinker with other adjustments until I can pin point the problem.
Yes this load sensor module has a coil that is wrapped on a single line of stator output.this board may utilize a 12 volt source from alternator
Posted on Aug 22, 2020
SOURCE: Honda EM 2500 Generator
I posted a general tutorial on troubleshooting this problem here.
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Carl
Posted on Dec 05, 2008
SOURCE: Powermate 6250 loaps.
I took a new generator out of the box, filled it with oil and gas then started it. The govenor /carb linkage was moving violenting back and forth and the engine was backfiring.
I was able to get it to settle down by holding the linkage and closing the throttle plate a little but it would resume surging and backfiring when I let go of the linkage.
I tried again several weeks later. This time, after babying the linkage to get it to settle down, I moved the linkage about a 1/4 inch (which closed the throttle plate slightly) and lightly secured it in place with a ty-wrap. After running 10 minutes it finally settled down to where the backfiring stopped and the linkage stopped moving.
It was still okay after powering a heater motor and light.
I'm thinking that the problem with this engine is just that it needs a long warm-up time. I know very little about engines, so I could be wrong.
Bill
Posted on Dec 14, 2008
SOURCE: Yamaha ef1000 will only idle and produce 12 vac
Hi, I have the same generator and I pull the load and it is fine. The engine RPM is controlled by the
governor. The voltage will not come up until the RPM is at full. First see what the RPM problem is and then check the voltage. Open the cover and look to see if the carb linkage is hooked up , if it is you mite have carb problem and address that first. Hope that helps.
Posted on Dec 19, 2008
SOURCE: Porter Cable 5500w generator (10hp BS) will not regulate speed.
While attending college I worked at a tool rental center and learned a great deal about matching generators to customer requirements and troubleshooting customer owned units. There are simple tests that you can perform, however, first some info on what to expect from a generator. Most generators are overrated and under powered. You should only expect to get about 60 - 75% of rating. Example, a commercial honda 5000w generator has an 11hp motor that can only produce about 9.5 hp at 3600 rpm. If a customer needed 5000w of power, we would rent them an 8000w generator because as the generator is loaded to max the voltage will drop. You generator will probably only provide steady voltage ex. 115v at 60 cycles to about 3500w then voltage will begin to drop. New generators have automatic voltage regulator that varies the power to the armature increasing/decreasing the power of the magnet. These voltage regulators suffer a high failure rate and are expensive. If your generator is not giving you 3500 watt at 115v 60 cycles your engine may have a few problems and your power generator end may need tweaking. (I would not expect to achieve 5500w at 115v with briggs 10hp) .
The governor is about 2 inches in diameter and turns off the cam gear inside the engine. It is flyball type with two or three small arms that react to rpm. The faster the engine turns, more force is applied to the governor arm to reduce engine speed. Easy to test, with engine running use finger pressure against the arm to increase speed and you should feel a greater resistance as the engine speed increases. Another simple test, remove air filter to expose butterfly inside the carb. Move the governor arm and check that the butterfly opens fully. If it does not open fully linkage and governor is not set correctly. Next, start engine and load generator up to max and check that butterfly opens to full as the load increases. When the butterfly opens all the way under load the engine is at max. Add up the wattage of all the tools/appliances you used to load the engine to get an idea of max load . Lets assume that the shop adjusted the governor properly, if the governor was not working the engine would over rev. and damage would occur. As you were told the governor spring controls speed and can be adjusted somewhat by bending tab or adjustment screw. But a review of your generator manual or that series of briggs engine will show that there are several governor springs available and different placement holes on the governor arm to attach the spring that will change the power curve. Pulling on the spring can only do so much, however changing the spring to different gauge /turns/material or differnet location on the governor arm will cause the engine to perform differently. These springs are sold thru briggs dealers by part number for your engine. This would be considered tweaking to get a different power curve.
Now for the generator. Some generators have a capacitor incorporated in the windings. This capacitor must measure within 95% of rating. Remove from circuit for testing. Finally look very carefully at the commutator rings for any evidence of brush bounce. If the brushes do not perfectly seat you will lose power. If your generator is brushless you can only hope that the diodes are within spec. because it is too difficult to test them. They also must be removed to test. Finally if your generator has an automatic voltage regulator the only test would be to replace with a known good part. At the rental center we stocked spare parts so that we could quickly find fault. There is soo much to learn and the life too short. I hope this helps good luck, please email your questions.
Posted on Dec 27, 2008
SOURCE: Generac Guardian 15kW Generator
That sounds just about right, if the relay contacts get welded together it sometimes takes out the driver on the printed circuit board. As you found out, 12vdc from 23 to 194 makes the transfer switch move to the Generator position, relay not energized makes the ATS move to the Normal position.
You can make a nice test function by installing a 10 amp contact switch in series with either the N1 or N2 terminals. When the switch is open the generator thinks the Normal power has failed.
Regards,
Carl
Posted on Jan 26, 2009
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