Your last generator Maintenance Run

[daugen]

That’s a good price…. But I would also wonder why it was pulled. Maybe too small for their house

thanks
I'd want a guaranty of decent operating condition if bought from a company
I have a 900 sf cottage with one small hvac
probably the right size
I run it all on 9kw now with the hot water heater turned off but it struggles at times

I think with the "reasonably" priced models up to 24kw now, going up from 17 to 24
might have been what someone needed with multiple hvacs. Or a new hot tub.

 

[grsthegreat]

Nice size/price.

Outside of the garage, firing it up on a 30# tank might be a good idea.

Rgds, D.

For a test maybe. It will freeze a small tank of fuel

 

[3930dave]

For a test maybe. It will freeze a small tank of fuel

Understood, @ Load.

Perhaps also a large enough pail to sit a 30#'er into hot-water for the short test ?

Rgds, D.

 

[Fallon]

Understood, @ Load.

Perhaps also a large enough pail to sit a 30#'er into hot-water for the short test ?

Rgds, D.

That's a standard work around for blacksmiths on gas forges. They freeze up due to rapid use too. As long as it's warm not boiling your fine. Some use a torch or heater, but that's pretty dangerous. If it's just a short test like 5-10 minutes you probably won't need to bother with anything

 

[3930dave]

That's a standard work around for blacksmiths on gas forges. They freeze up due to rapid use too. As long as it's warm not boiling your fine. Some use a torch or heater, but that's pretty dangerous. If it's just a short test like 5-10 minutes you probably won't need to bother with anything

Makes sense (not the torches etc....) . Increase in tank area (@ Cold Ambient) is one reason for dual-manifold tank setups, ie. on RVs, and IIRC, somebody built one on here for their small gen.

I understand some of the general thermodynamics, and have seen my HVAC buddy do same (water/pail) with refrigerant.

d seems to have found a good deal, and may have been working fine when pulled, but nothing beats actual operation and check of fundamentals....

Rgds, D.

 

[90cummins]

I had mentioned earlier that the regulator on my Neihoff 28 volt alternator was bad and I was undecided on how to proceed. Being a fan of market place I found a 5500 watt belt driven generator with a Yanmar hopper cooled diesel mounted on a very nice frame.
I picked it up for $250 brought it home and with a bit of love got it running and did a test run when the generator stopped working.
Inspection found a bad capacitor and TBN helped me find one that works very good regulating at 120v at 60hz.. I also replaced the 3 pole 240v outlet with a 30 amp 4 pole 120/240 outlet.
A google search originally identified the engine as a Yanmar NS10 however further looking found that NS65G is cast into the back of the flywheel.
After giving the injection pump some love and 4 oil changes and several oil filter cleanings I ran it loaded 2.7kw for several hours in preparation for load and fuel consumption testing.
The engine runs at 2200 rpm and the belt driven generator runs at 3600rpm.
It handles a 2.7 kw load nicely but the governor not as accurate allowing the engine to run up to 2500 rpm (68)hz when unloaded.
I have determined that 3.5kw is the maximum load the engine can manage.
The engine is hopper cooled with water and is NOT pressurized but has a condensing radiator on top with a belt driven fan which cools, condenses and recycles the water. During extended full load runs I have not observed steam escaping from the vented overflow tank.
This engine is started with a hand crank that I’m unable to manage so I use my Milwaukee magnum drill and an adaptor to & start it.
Fuel consumption is approx 18-19 grams per minute with a 2.7kw load.
If my rusty math is correct it would run 2.9 hours per gallon with a 2.7kw load (3.618)hp.
Based on my limited time with this unit it would not work as a stand alone backup because of the poor governor speed control however it would work fine as an AC supply for my inverter because the inverter would condition the input power and provider true pure sine 60hz output voltage.
Because of the low operating speed of 2200 rpm I would not hesitate to run this for days if needed.
I was having very little luck in finding information on this engine until bmaverick from TBN saw my post.
The information he had at his fingertips and his recollection of data was truly impressive.
That’s it for today 90cummins

Attachments

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  IMG_3200.jpeg

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[90cummins]

Top photo shows the water condenser/radiator.
Second photo is baffle that has rusted away. I made a new baffle from a lumber joint plate.
The bottom photo shows the wet replaceable cylinder sleeve.

 

[gsganzer]

We moved into our new home a few weeks ago. As part of the utility transfer, the gas company had to come out and inspect the installation and document the gas appliances. I had been smelling the slightest odor of propane near the tank/generator area. Turns out the supply line to the generator was barely hand tight and leaking.

 

[arto98607]

I had mentioned earlier that the regulator on my Neihoff 28 volt alternator was bad and I was undecided on how to proceed. Being a fan of market place I found a 5500 watt belt driven generator with a Yanmar hopper cooled diesel mounted on a very nice frame.
I picked it up for $250 brought it home and with a bit of love got it running and did a test run when the generator stopped working.
Inspection found a bad capacitor and TBN helped me find one that works very good regulating at 120v at 60hz.. I also replaced the 3 pole 240v outlet with a 30 amp 4 pole 120/240 outlet.
A google search originally identified the engine as a Yanmar NS10 however further looking found that NS65G is cast into the back of the flywheel.
After giving the injection pump some love and 4 oil changes and several oil filter cleanings I ran it loaded 2.7kw for several hours in preparation for load and fuel consumption testing.
The engine runs at 2200 rpm and the belt driven generator runs at 3600rpm.
It handles a 2.7 kw load nicely but the governor not as accurate allowing the engine to run up to 2500 rpm (68)hz when unloaded.
I have determined that 3.5kw is the maximum load the engine can manage.
The engine is hopper cooled with water and is NOT pressurized but has a condensing radiator on top with a belt driven fan which cools, condenses and recycles the water. During extended full load runs I have not observed steam escaping from the vented overflow tank.
This engine is started with a hand crank that I’m unable to manage so I use my Milwaukee magnum drill and an adaptor to & start it.
Fuel consumption is approx 18-19 grams per minute with a 2.7kw load.
If my rusty math is correct it would run 2.9 hours per gallon with a 2.7kw load (3.618)hp.
Based on my limited time with this unit it would not work as a stand alone backup because of the poor governor speed control however it would work fine as an AC supply for my inverter because the inverter would condition the input power and provider true pure sine 60hz output voltage.
Because of the low operating speed of 2200 rpm I would not hesitate to run this for days if needed.
I was having very little luck in finding information on this engine until bmaverick from TBN saw my post.
The information he had at his fingertips and his recollection of data was truly impressive.
That’s it for today 90cummins

Attachments

• 
  IMG_3200.jpeg

  5.7 MB · Views: 151

The Chinese Changfa S195 is of somewhat similar design, which as far as I recall is based on about 70+ year old German design.

Their output is around 10.5 - 11 kW max, can easily run 8 kW generator and are loud!

 

[90cummins]

We moved into our new home a few weeks ago. As part of the utility transfer, the gas company had to come out and inspect the installation and document the gas appliances. I had been smelling the slightest odor of propane near the tank/generator area. Turns out the supply line to the generator was barely hand tight and leaking.