Author Topic: Kohlor 8.5 kw with Lister SR2  (Read 1962 times)

cobbadog

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Re: Kohlor 8.5 kw with Lister SR2
« Reply #45 on: March 16, 2020, 10:34:45 AM »
Hi snowman,
Now that is one sad story and outcome. Yes bloody annoying that it happened but I bet he never does that again.

As for the varying compression ratio on the Mac the bearing are quite possibly babbit and are in the shape of standard shells but where this is different is that the 2 shells fit into what you know as a big end bearing cap, 2 of them. One of the caps is rounded as normal on the out side but the other is machined flat. The end of the con rod is also machine flat and long big end bolts hold the 3 pieces together. To cahnge the compression ratio you add or subtract shim between the 2 flat machined surfaces. This lengthens or shortens the over all length of the conrod. Standard has 2 shims and I will have to study up as to how many extra can be installed before it is too high and impossible to hand crank over to start. I know when this was last running it had 2 shims in place and that is what will go back in as a first start up. To change it you remove the top plate and the back plate and simply undo and remove the two bolts and add or subtract shims and bolt it up again. I can take a pic of it if you like.
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glort

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Re: Kohlor 8.5 kw with Lister SR2
« Reply #46 on: March 16, 2020, 11:11:56 AM »

  Glort is obviously a far better person than I (and probably loads more sensible), as I would be livid with the guy and certainly would let him know

HAHAH!! Thank you for the Compliment mate but clearly you don't know me too well.  I'm Damaged goods well and truly and when someone really wrongs me, I'm not a rational person when it comes to payback and I always get it because I can't sleep till I do.
I have a LOT of regrets in life but payback is only one of them for not doing enough.  If Ever I get a terminal disease, there are some people that should be VERY worried indeed!

What was that about sensible?   ;D


I can see well and Truly why you would be pissed Gill.  Given the further info, I would be too.  Something at the top of my list of things that tick me right off is people whom are not appreciative of people that help them.  As you say, He could have taken the thing, said thanks very much, Can I buy you a slab or what's your favourite Scotch and that was it.  If he didn't want to do you any favours and potentially put himself at risk of loosing his licence with overlooking things on the inspection, Fair enough.  No reasonable person would expect him too. No need to insult someone telling them. 

I would be ticked too had he taken your generosity as having a string attached and been so indignant about it. 
I probably gave the guy too much credit in what I said before and not knowing the story. I assumed like most people he would have been tickled pink to get something like this.  The comments suggest otherwise and he did not appreciate it as he should. Would also suggest that he probably does not care as much as I suggested or would have assumed with the thing being damaged.  VERY Disappointing.

At 35 hes not a kid although may well act like one.
 If he hasn't learnt a bit of Humility, appreciation and respect by now..... Going to be a real arsehole when he gets older!   :(

snowman18

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Re: Kohlor 8.5 kw with Lister SR2
« Reply #47 on: March 16, 2020, 05:04:46 PM »
Glort we moved from British Colombia to this province about 8 years ago our rural neighbors  decedents of the original homesteader immigrants from the Ukraine, Russia and a hand full of Hudson's Bay people.

Schooled in one room facility, most never been more than 100 miles from home. I've coined the phrase one room school house mentality.

Danny a bloke from Ontario bought a few property's in Erickson a half hours drive from where I live, anyhow Danny's at the landfill beaking off the the custodian about some realtor woman.

When Dan told me about the incident, I had to tell him that the realtor woman was the custodians daughter nd that living in small town Manitoba everyone is related either by blood or marriage.


Outsiders are looked upon as fresh money.

We had purchased an acreage, and had a neighbor who was a well driller come in to drill the well, test hole at 176 ft nice pea gravel coming to the surface with plenty of water but a bit salty.

Good enough for stock, a week later when pat and i visited the property the driller is finishing up and has his hand out for the money. I ask how many gallons a minute.

He says 3, I say wtf you were pulling pea gravel with loads of water, he says we dropped the screen at 156ft we could not get to 176 ft.

Told him to pull the screen and go home, not going to pay for 3 gpm.

Sent me a bill in the mail, threatening court action, finally I got in touch with the water management people in the bid city asking for drillers reports from the surrounding area.

As I'm interested in minerals had kept samples of the mud coming out of the well holes from various depths.

The guy from water management wanted some back story, told him the driller has possibly falsified his drillers report and that I was going to take him to court.

Never did receive any of the reports requested but the threats ceased to arrive in the mail, but in the meantime had been ostracized by my neighbors.

We never did move onto the acreage.





 

snowman18

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Re: Kohlor 8.5 kw with Lister SR2
« Reply #48 on: March 16, 2020, 07:48:24 PM »
Hi snowman,
As for the varying compression ratio on the Mac the bearing are quite possibly babbit and are in the shape of standard shells but where this is different is that the 2 shells fit into what you know as a big end bearing cap, 2 of them. One of the caps is rounded as normal on the out side but the other is machined flat. The end of the con rod is also machine flat and long big end bolts hold the 3 pieces together. To cahnge the compression ratio you add or subtract shim between the 2 flat machined surfaces. This lengthens or shortens the over all length of the conrod. Standard has 2 shims and I will have to study up as to how many extra can be installed before it is too high and impossible to hand crank over to start. I know when this was last running it had 2 shims in place and that is what will go back in as a first start up. To change it you remove the top plate and the back plate and simply undo and remove the two bolts and add or subtract shims and bolt it up again. I can take a pic of it if you like.

Very ingenious of the engineer.

cobbadog

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Re: Kohlor 8.5 kw with Lister SR2
« Reply #49 on: March 17, 2020, 05:37:54 AM »
Here is a pic of the piston and big end bearing caps and maybe some shims along with a heap of other crap that will become an engine. You can also see the Hvid / Brons injector along with a heap of linkages and levers with springs, this is the rocker gear and linkages that connect to the injector.
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snowman18

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Re: Kohlor 8.5 kw with Lister SR2
« Reply #50 on: March 17, 2020, 06:36:46 AM »
Here is a pic of the piston and big end bearing caps and maybe some shims along with a heap of other crap that will become an engine. You can also see the Hvid / Brons injector along with a heap of linkages and levers with springs, this is the rocker gear and linkages that connect to the injector.

Way cool, thanks for posting the picture.

Definitely looks like a poured babbit bearing.

cobbadog

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Re: Kohlor 8.5 kw with Lister SR2
« Reply #51 on: March 17, 2020, 10:15:42 AM »
I haven't seen this idea used on any other engine I know of. Simple in design and practical as well. I found at the bottom of a jam tin that has other spare parts in it and sitting on the bottom is a full set of new rings. One less thing to source at a later date.
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glort

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Re: Kohlor 8.5 kw with Lister SR2
« Reply #52 on: March 17, 2020, 12:15:10 PM »

is that 5 or 6 Rings?

What do these things run? 50:1 compression??

Maybe works on the concept you can drip the fuel in and get it to light of you squeeze it hard and get it hot enough!  :0)

cobbadog

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Re: Kohlor 8.5 kw with Lister SR2
« Reply #53 on: March 18, 2020, 11:05:13 AM »
So far with the limited info in the only booklet I have on the engine compression ratio is not listed that I can find. You mentioned that the fuel can drip in and be squeezed to death to make it ignite, well maybe. This system had a fuel cup where the fuel is dripped into before getting down to the cylinder.
5 rings and they are all the same but they describe the bottom ring as being an oil ring and I guess this is because it is at the bottom where it will be in contact with the oil in the sump. It is also a horizontal engine and the specs claim it is all of 2.5 hp for this model.
There is a limitation to how many shims can be fitted before the piston will hit the valves but before you get that far you wont crank it over compression even when you use the decompression lever and drop it they will stop dead and you wont be able to continue to crank. There is a weird series of steps to take before starting up from the obvious, checking oil level (sorry snowman didn't mean to raise that again) to priming the oil lubrication system to get the piston wet and the bearings full, winding the engine backwards to prime the fuel cup then lift the decompression, crank away and drop the lever and if all the planets are aligned it will go bang and run. That was just a very general over view of the start up proceedure.
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snowman18

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Re: Kohlor 8.5 kw with Lister SR2
« Reply #54 on: March 23, 2020, 02:14:22 AM »

is that 5 or 6 Rings?

What do these things run? 50:1 compression??

Maybe works on the concept you can drip the fuel in and get it to light of you squeeze it hard and get it hot enough!  :0)

Six compression rings, no oil control ring.


cobbadog

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Re: Kohlor 8.5 kw with Lister SR2
« Reply #55 on: March 23, 2020, 03:36:41 AM »
And that is exactly how the new ring set is, all compression rings. I guess they feel that after all those rings bugger all oil is going to get to the top. Having said that I do have access to a company that specialises in the supply of pistons and rings and is fairly close to where we live so might do a trip to see if he does have a proper oil ring to suit.
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glort

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Re: Kohlor 8.5 kw with Lister SR2
« Reply #56 on: March 23, 2020, 09:48:24 AM »

I wonder what the idea behind that design was?

Very low blow by / leakage, stabilise the piston in the bore, high compression, low ring tension, less bore wear?

cobbadog

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Re: Kohlor 8.5 kw with Lister SR2
« Reply #57 on: March 23, 2020, 10:52:41 AM »
Everything about these engines are very different. The adjustable compression ratio, ring set all the same and the weirdest is the injection system known as a Hvid / Brons set up and very tricky to get it set up correctly.
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snowman18

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Re: Kohlor 8.5 kw with Lister SR2
« Reply #58 on: April 30, 2020, 12:50:49 AM »
Apparently no serious harm came to the SR2 Lister, below a snippet from an email received this morning from Taylor.

My invertor is happy with the power it produces and charges my batteries too. Probably ran it for 8 hours so far and it hasn't burnt a half tank of fuel.

cobbadog

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Re: Kohlor 8.5 kw with Lister SR2
« Reply #59 on: April 30, 2020, 07:20:22 AM »
Now that is good news snowman.
Final word on my McDonald as I have now a separate thread is that it does have to have an oil ring in #6 ring groove. they are on order but have to be made first in N.Z. and they are in shut down at the moment.
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