Interesting Find, and Fix, 90. Thanks for posting the details and pics..... not a design I was familiar with.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
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No water-pump to change !
Rgds, D.
