Power Generator "Surging"

Greetings,

When was the last time PM (preventive maintenance) service was performed on the engine?

Could be any number of engine related issues.

Your comment "there is a cloud of dark smoke discharged from the exhaust system" indicates perhaps a dirty air filter or dirty/semi clogged injectors, bad fuel (stale)/water in fuel to name a few, if your are getting a "cloud of dark smoke' all the time and not just for a few seconds during start-up.

Perhaps now is the time to contact the manufacturers service rep to schedule PM service.

As far as "correct" words, your description was fine.

Here are a few other common descriptive words - When engine is running "stable" you can use the words "engine is running smooth" or in the case of "unstable" you can use "engine RPM is surging" or "engine is surging".

Good luck

This is not my field of expertise, but when my neighbor's snow blower was surging like this, the suggestion (from somebody else) was to make sure the air filter was clean. (Of course, that surging was continuous, it did not stop after 10 minutes.) Maybe another possibility is the fuel filter.

(It also appears analogous to situations I've seen with coal mine ventilation fans surging--the bottom line was that the air resistance was higher than designed--a lay diagnosis described the problem as "pulling the air in two" ;-)

Try the governor spring. As a governor spring ages it gets weaker and needs replaced. I've corrected this problem on many of small engines I've worked on in the past.

this happens on many equipments.for rotating equipments ,if it is not used everyday then it should be rotated atleast one rotation everyday.

for generators ,it should be started atleast every week.and that too by creating similar situation for which it is intented.ie if has to be started automatically when power fails ,then the power supply to cut off or relay to be energised.also it should be loaded too.and every month it should be worked with its overload capacity.and in each 6 months it should be loaded and run for 30 to 60 minutes.

the similar method has to be adopted for batteries too.it should be loaded and worked.

ty

I have yet to see anyone suggest "loading" the generator. Load up the generator to near max load while running, and let it sit and hum.

What has been said here so far I agree with, govenor springs get weak when they sit. Potentiometers will draw up water and change values - so yes, govenors will have difficulty if left "un-exercised." Wet-stacking of the engine is also a problem when running unloaded. The system doesn't develope the heat necessary to burn out all the gunk that builds up with short runs. (On a side note, engines that run continuously show less acidity in their oil - in general - than engines that are constantly run for short periods of time and not allowed to warm up).

Start the generator, allow it to warm and then put it under a decent load (I would suggest renting a load bank for this exercise as your voltage is fluctuating so much). Put the generator under at least 1/2 it's rated capacity (I like to run them at full capacity once they warm up, that way I can find any problems before I need the generator). Run the unit for a few hours loaded, and then shut down the load. Allow the generator to continue to run unloaded for about 30 minutes to cool the alternator. Then shut down the generator. If nothing else, this will help to remove stale fuel from the fuel tank and ensure the damn thing runs!

Chris

As per your detail.....The problem is in Engine...when the engine plays this kinda noise the the load occurs on engine nd the rpm goes down. with the rpm voltage also goes down..so you just chek the engine part. or call the cumins service engineers for chek it... Kunal Gautam Electrical Engineer

Everybody, I have good news on the issue that the genenrator is working well again. Anyone wanna knows why?

I'm curious, please tell us about it.

Mrclean,

Actually, we have pointed out most of the related issues. This generator has been leaving there and no one cared of it. So the feul filter may get stuck. Thing is, someone has adjusted the fuel control system to adapt to the clogged filter.

They keep adjusting and adjusting... so now the PIC control is not appropriate. Now, the Vendor comes and jsut bring it back to normal rate.

The fuel is ok and the smoke is reduced. I am sorry for those simple words and will be clear and detailed in the other days.

Thank you for your support,

Did you get all the green fuzzy stuff out of the fuel tank?

Seriously, what did you find?