Lister Engines > Lister Based Generators

Wiring Diagram or Knowledge on speed control of Lister Generator diesel engine

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I very much doubt that you will  be able to recreate a SOM as they require a Brush generator head with it`s built in starter motor. The S series lister engines do have a mounting for a regular starter motor on the back of the flywheel housing, check to see if there is a toothed starter ring on the flywheel. I am not sure if this could be used to recreate an SOM The wiring could be very tricky.
Looking forward to seeing what you come up with.


David Van Leerdam:
Thanks Bob. Have got coils worked out and tested out and working ok fan flywheel has no ring gear so hand cranking it is . Job has grown considerably as motor has had bad oil leaks and very low on comp so pulling down to check out . Any idea on a good place for parts ie gasget set maybe rings .Thanks

Hi David, parts suppliers depend on what country you are in. Gary at Diesel Electric in the USA supplied all the bits for the ST2 I rebuilt. He is very knowledgeable and ships worldwide. The cylinders can be rebored out to +40 thou and oversized pistons come in +10,20,30 &40 thousands of an inch. New cylinder barrels are also available and might be cheaper than a rebore, depending on where you live.
Check the condition of the oil pump, it is hidden under a plug on the bottom of the engine, no point rebuilding an engine with no oil pressure.
If you can find a Brush SCAFF type generator head it has an integral starter motor/alternator as well as the 110/240 volt generator, better than hand cranking. Failing that you might be able to get a gear ring that will fit.


David Van Leerdam:
Thanks again for your information so far no majors a valve grind  needed and a bore hone as bores look good and ring clearances tolerable, as for the gen set it probably would be rare as rocking horse crap. Will keep plodding on thanks again.MMDN


--- Quote from: ajaffa1 on May 15, 2023, 11:19:59 PM ---Good day, I largely agree with Oldgoat. Lister made a lot of generators based around their S series engines (ST, SR, SL). These had two solenoids mounted at the governor end of the engine. The front one is the fuel control solenoid and is connected to the fuel injector pumps, when energized it releases the fuel control racks allowing diesel to be pumped up to the fuel injectors. This solenoid is a latching solenoid with two coils and a small internal relay switch. During the start up process, 12 volt dc is fed through the two coils opening the fuel supply, once the solenoid is open the small relay switch is triggered turning off the voltage to one of the coils and the solenoid is able to stay open on just one coil.
The second solenoid is a 240v unit (110volt for US models), this is connected via a spring loaded linkage, to the two decompressor levers on the top of the engine. During start up the engine spins up without compression, as the generator head starts to produce electricity this flows to the solenoid coil opening it and pulling the two decompressor levers into the run position allowing the injected diesel to ignite.
These engine would have been set in the factory for 1500 RPM for a 50HZ generator or 1800 RPM for a 60 HZ output. My ST2 had some throttle adjustment available to fine tune the output.
Hope this is helpful,


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Just editing this post as answered own question - so I appear to have a Start o Matic missing the control panel which the previous owner seems to have been running on a manual start.


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