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Messages - Chris_DK

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Generators / Re: Capacitor calculation for DIY stand alone genset
« on: May 02, 2021, 06:25:29 PM »
If I am reading that motor tag right the voltage is 400 or 690 volts and what phase ???

Correct me if I am wrong - my electrical knowledge is just above the zero mark and I obviously need to learn more ;-).
I understand the  motor tag this way:
~3 means three phase
delta 400 means three phase 400V
wye 690 means 230V between phases

Generators / Re: Capacitor calculation for DIY stand alone genset
« on: May 02, 2021, 06:20:27 PM »
thanks for the link, my initial idea was to make a genset out of "scrap" parts that are easily and cheaply available and the make a building manual, so anyone with basic skills could build one cheaply without falling in the  same pitfalls that I am already falling into. I can see the idea is not ideal and mayby slightly waste of effort - anyhow I have booked a couple of hours with a professional electro-guy and maybe he can guide me to the right way to do it or convince me to buy an off the shelf generator head.
I am still a bit puzzled as what parts make a off the shell generator do the job, to my understanding those are also based on asynchronous gennys - is that the avr or ..?? Have other people taken this route and succeeded?

Generators / Re: Capacitor calculation for DIY stand alone genset
« on: April 29, 2021, 03:41:43 PM »
As I understand I'll need a rheostat for variable loads, is that correct?

Generators / Capacitor calculation for DIY stand alone genset
« on: April 29, 2021, 08:29:20 AM »
I am building a homemade genset consisting of a Lister SR2 and a belt driven asynchronous motor as generator. I am in no way proficient in the electrical field, so this is also a learning project. I have tried to calculate the right size for capacitors as this will not be connected to the grid.
I've found two different equations on the web.
Equation one returns 108 uF
Equation two returns 62,5 uF

Could anyone say which is correct or come up with a valid equation of size of capacitor, before I start throwing money at useless parts :-).
I am planning to build a redundancy setup with 2 engines and 2 gennys on a common shaft, to mitigate breakdowns and service, so a valid equation would be very nice.

Engines / Comparing fuel consumption HR2, ST2 & SR2
« on: April 29, 2021, 08:14:43 AM »
This may be of interest when choosing the right engine for your project. Data for straight diesel taken from Lister instruction books.
Cheers Chris

Waste Vegetable Oil / Re: Guide to using Veg oil.
« on: April 11, 2021, 04:10:55 PM »
The links to the guides are broken - if anyone has the doc or pdf, I'd very much like a copy.


General Discussion / Re: Engine identification Lister-Petter HR2
« on: April 11, 2021, 01:04:15 PM »
I hear you guys.

From preliminary calculations for winter months -  i need to run the 10 kw for approximately 4 hours every day to heat a thermal water battery of 1000 liters from 20 degC to 60degC.

I have som powerhungry 400V tools, but have not yet made calculations to the exact need, point taken I,ll go back to the drawing board for power needs and fuel type.

General Discussion / Re: Engine identification Lister-Petter HR2
« on: April 11, 2021, 08:16:04 AM »
Priority number one is of course to make the engine start and run well on diesel, but I am a very curious soul, so I'll have to check out the alt fuels at some point, WMO = waste motor oil, WVO=waste vegetable oil.

General Discussion / Re: Engine identification Lister-Petter HR2
« on: April 10, 2021, 09:14:01 PM »
Yep, ordered fuel and oil filter - the airfilter is oil,so just needs a clean and fresh oil. I do intend to put it to work. As it is 22,6 HP @1500rpm I plan to run a 10-12KW generator, to take me partly or over time completeley off the electrical grid. As I am on a microscopic budget i would like to try out WMO and mayby WVO, but I have not researched if this engine is even suitable for that, which is a bit backwards :). Have you tried alternative fuels on your HR2?
The general idea was to have two gensets, a small one and a big one, so I'd have a back up and the small one promarily for summer and the big one primarily for winter and heating a large thermal batteri - anyway I am learning along the way and with the moneyb tank on low, it will take some time.

The SR2 without gearbox:
This one has one of the cold start cups blinded. I have used that one cup with motor oil when cold starting. I pulled the rocker covers and checked the valve clearance - which was between 0,7 and 0,9mm, so I adjusted to 0,15 - 0,20mm, which was what I remembered from the manual. When I got back to the manual it said 0,35-0,41 for aluminum push rods, so I'll have to readjust the valve clearence  again. Anyhow, I ran it for about 25 minutes and the mechanical noise seemed significantly reduced.

So measuring compression means I have to pull the injectors and buy or borrow a diesel compression tester? Or can I just unscrew the top of the injector? Anyhow, I should pull the injectors to see if they spray properly.. Are the fuel parts metric thread or some of the funky British threads? :)

What do you consider healthy compression for an SR2 engine?

Sadly I have no history on the SR2s.

One last question for today. Icant really get my mind around understanding how the fuel overflow pipe from the injectors work and what their purpose is.


First of, the gearbox motor with raised starter setup.
First i bled the fuel system from filter to pumps, though not on the injection pipes. I filled both cups half full of motor oil and cranked before attempting to start it. After several sweaty attemps I filled the cups half with twostroke premix and this fired it up. I has no exhaust manifold and looks like i has quite som residue buildup in the exhaust channel. Also when it ran, it was making a lot of sparks out the exhaust - like fireworks, so I guess the inside of the engine is in need of a decarbonizing at least. I tried to start it again today, but it would not fire. I'll have a look at valve clearance and injectors before I decide to take it apart.

General Discussion / Engine identification Lister-Petter HR2
« on: April 09, 2021, 06:04:32 PM »
Greetings. I have this very nice Lister-Petter HR2 sitting in my barn. As far as I understand it is a
CCW rotating
Built in 1990
Number 95 produced that year.
I read somewhere that the numbering system was changed in the eighties, so I am in doubt if it is correct.
What does 910 stand for? 
The engine plate reads

(It starts very easily and sounds so beefy waiting for oil and filters before running it again)

Thanks sirpedrosa and cobbadog,

I proceeded to the fuel pump/push rod cover plate and had a go at it with fine wet sandpaper - only to find no numbers, so either they have been ground down by previous owner or the rivetted plate fell of at some point.
For now I'll treat them as a SR2 and a SR2 Marine and start figuring out why they start so poorly.

The marine version is almost impossible to start both cold and hot.

The one without gearbox is somewhat difficult when cold, but starts after 3 revolutions of the hand cranking when hot.
Any leads to where I should start first. (New diesel filters and engine oil should arrive any day, but i figure that is not the only problem).


I removed the electric starter and the gearbox and handcranked it to life, but definitely not an easy starter, but ran ok on both cylinders once it was running.

Do you have any comment on the one with the portuguese engine ID?

Listeroid Engines / Re: HA3 oil capacity?
« on: April 08, 2021, 04:45:10 PM »
12,5 or 14,2 liters.
BR Kristian, Denmark

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