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Vintage Diesel and Oil Engines

LIster LT1 Questions


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  #1  
Old 12-27-2018, 05:43:36 PM
bowtie67 bowtie67 is offline
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Default LIster LT1 Questions

I just obtained a Lister LT1 single cylinder engine. It's complete except for a fuel tank. I have a question about a broken plastic fitting located just above the ID tag. Is that a crankcase breather? Where can I get something to replace it?
Also, it seems to have very little compression.
Serial number 07687LT128-09 Any idea it's age? Any help appreciated
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  #2  
Old 12-27-2018, 11:16:16 PM
K-Tron K-Tron is online now
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Default Re: LIster LT1 Questions

It looks like the decompression lever on the side of the head is in the full decompression location. Simply turn that decompression valve handle down and it should have enough compression that you cannot crank the engine by hand slowly. You may have to pull the valve cover and check the adjustment on the decompressor. The threaded set screw can back out if the proper retaining nut is not installed. I do not see the broken plastic fuel fitting that you are referring to. All of the Listers I have worked on had brass banjo type fittings for the fuel system. Your engine was built in 1978. 1950 +28 (last two numbers in the serial number) = 1978

Chris
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Old 12-28-2018, 09:21:54 AM
S Mullins S Mullins is offline
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Default Re: LIster LT1 Questions

thats the primer plug for cold start probably,its for a little oil right in the intake. works great.
You may only have a little carbon under a valve seat,mine will do that when they sit a long time.
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Old 12-28-2018, 01:06:46 PM
bowtie67 bowtie67 is offline
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Default Re: LIster LT1 Questions

Thanks for your replies. Here are several more pictures of the LT1. It appears to be a gear reduction and at some point someone added a Delco starter generator.
The compression release lever has no resistance when moved.
The one picture, clearly shows the remains of the plastic cold start device on top by the valve cover. I think it can be eliminated if I can't find a replacement.
Any help with parts appreciated.
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  #5  
Old 12-28-2018, 04:24:45 PM
K-Tron K-Tron is online now
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Default Re: LIster LT1 Questions

The "gear reduction" is actually the extended camshaft. That is where the hand crank goes for ease of starting the engine. Now I see the busted off fuel primer cap. You can simply put a piece of tape over it, or tap it and install a pipe plug. If you feel no resistance when moving the decompression lever, either the exhaust valve is already down, or the decompressor lever needs to be adjusted. You will have to remove the valve cover to do so. It could be as simple as turning a small nut back and forth, or could be a more difficult repair. The engine can certainly have no compression if a valve is stuck in the open position. If that is the case, penetrating oil and time is your best friend. After enough soaking you can try sticking a flat head screwdriver between the spring turns and see if you can manually pull the valve up. Let us know what you find, those LT1's are great engines.

Chris
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Old 12-28-2018, 06:40:08 PM
bowtie67 bowtie67 is offline
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Default Re: LIster LT1 Questions

Chris, Thanks for your reply. I removed the valve cover to see the decompression lever adjusting bolt. The lever has to be pulled outward and then rotated down to a vertical position to engage the decompression bolt with the rocker arm. After start-up, the lever must be rotated back up between the two "tabs" to hold it in neutral position.
After seeing how the decompression lever works, I tried it in both on and off positions. I now have compression.
I'm going to try and rig up a remote fuel tank and clean up the starter generator and try to get it running.
Are there any parts dealers in the midwest area?
Thanks for your help.

Forgot to ask.....anyone have a crank handle for starting a LT1?
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Old 12-28-2018, 10:43:56 PM
Combustor Combustor is offline
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Default Re: LIster LT1 Questions

Hello Bowtie67,
The North American distributor for all Lister products is located in Lyons, Kansas and may be contacted via gary@dieselgen.com Very helpful people and will likely have the parts you need. Regards,
Combustor.
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Old 12-29-2018, 11:47:46 AM
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Default Re: LIster LT1 Questions

Lister hand cranks are surprisingly difficult to find in the USA. It took me almost a year to find one for an SR, and that fits a larger camshaft than the LTs. If Gary does not have the parts, you might get lucky buying them from different sellers on ebay in the UK. I have had to do that on several occasions, as parts were not available here.

Chris
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