Behind the lister I had a big exhaustgas cooler so the gas exits at cooling water temp, max 90 degr C .

I made the box out of wood / thin plywood lined it with rockwool, inside I have to walls so you have three chambers. a pipe threw these walls in a way that the sound bounces of the opposing wall and cannot enter the next pipe directly.
If you look at a cut open car exhaust same thing only bigger with rockwool. Rockwool was rockfon ceiling plates like the ones they use in offices, but I am sure any kind will work
It was overkill because there was no noise at all even with your ear next to the exhaust.
Had to do it because I live really close to the neighbours.

The flaw of the design, exhaust gasses condensing in the last chamber with hot coolingwater and cold outside temps.

I think the yanmar will be easier to shut up, I am thinking of making a similar design but maybe in an old air compressor tank with a water drain at the bottem...

But rockwool labyrinth you can kill any sound or anyone without disturbing the neighbours.

Bernhard

DS3218MG
From Ali express it feels strong should pull 20kg. I haven't tried it yet  but I will.
Bernhard

By luck I have some time on my hands, I like to replace my 6-1 start o matic chp thats giving to much vibrations to use it indoors for one based on a yanmar TS 105.

Yanmar I bought I while ago as a genset 5 kw, to start with a good base I opened it for a quick peek inside. Turned out piston ran a bit hot, liner just needed some honing. To start off "new"I ordered new piston and liner with some gaskets from sunity taiwan. I think the set has nearly no running hours just lack of cooling water.

I scored a silent box for a small marine generator, brand new still in plastic, it should just fit snuck inside the box.

I like the lister 10 times better but it's like having a horse like a pet in your house, the yanmar more being like a hamster.

I'll try to post progress reports, it will not go fast due to more important stuff eating time.

I was pretty far with automation on the lister, arduino current measuring temperatures flow coolingwater. So hopefully I can just mount it to this one without to much trouble.
Need to think about some exhaust system with heat recovery absolute no noise and no dripping of condensing exhaust fumes at places you don't expect/want.
Thinking of putting the silent box on a raised frame and doing my exhaust 'scrubber'underneath.

I might need to order a new pully for the electromotor, it says 2400 revs max for the yanmar and that should give 1510 on the electromotor.

Yanmar has a throttle handle stop start run, I will replace it with a servo should also give me the ability to in/decrease power.
Electromotor is a dahlander two speed 1500 or 750. The tag plate was not there when I bought it but I think it is at least 8KW by the look at the size. The lister I always started on low revs and when it was running I would pop the breaker untill it reached 620rpm and then switch to the high rpm breaker.
If you 'drive'an electromotor you can use it as a generator.
For example if you read the tag and it says 3kw and 1470rpm, then when you dive it to 1530 you will generate 3kw.

To be continued,

Bernhard

Welcome on the forum, if you search on google you should find a few websites with explanation how to find it, or wait a bit and somebody here has a list at hand.

Succes with your project and send some pictures !.

Bernhard

https://www.youtube.com/watch?v=YqoTgewlDkI

I will show it to my wife puts things in perspective

New tip for injector and new barrel for pump and it's new again.

greetings bernhard

Thanks for all the nice replies, its missing some brackets so when I speed it up the air casing is resonating and touching the flywheel. Brackets were welded to the fueltank support still need to mount them.
When you speed it up it does start to 'walk" a bit. It's an 8/1 with alluminium piston maybe that helps to keep it more ballanced. I have a 6/1 som thats really not as ballanced as this.

Greetings Bernhard

https://www.youtube.com/watch?v=FaV_CQf7-Ec&t=13s

Still some brackets missing, found they were on the fuel tank. Was the first run in the new location.

Bernhard