Lister A and H3 pump
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Lister A and H3 pump
Hi everyone
This is my new project she doesn't run currently no spark
thanks Keith
Ok after taking the Magneto of and giving it a really good clean we have a spark
It is a anti clock magneto can any one advise how to make sure the timing is right
I can find no marks on the fly wheel for TDC as i have seen a video that says they should be there
Any help gratefully received
Many thanks Keith
This is my new project she doesn't run currently no spark
thanks Keith
Ok after taking the Magneto of and giving it a really good clean we have a spark
It is a anti clock magneto can any one advise how to make sure the timing is right
I can find no marks on the fly wheel for TDC as i have seen a video that says they should be there
Any help gratefully received
Many thanks Keith
Keith H- Born to be wild
- Posts : 31
Join date : 2022-09-02
Re: Lister A and H3 pump
20* before TDC, find TDC, normally key facing down and turn flywheel back about 2 1/2 inches, set points to open about there and it should go.
Appletop- Life Member
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Join date : 2010-01-02
Age : 56
Location : Just outside Diss
Re: Lister A and H3 pump
Maybe you can't find the marks because the flywheel faces have been painted. Sometimes the marks are quite faint.
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blue cat
blue cat- Life Member
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Join date : 2013-10-10
Lister A and H3 pump
Many thanks for the responses i shall hopefully try later to see if she will run
Thanks again Keith
Thanks again Keith
Keith H- Born to be wild
- Posts : 31
Join date : 2022-09-02
Re: Lister A and H3 pump
Well everyone after 2 days of tinkering she still will not start
the Magneto sparks on the bench but struggles when fitted to make a good spark
I have cleaned all surfaces on the mounting to the engine and to the Mag
Cleaned all the fuel tank and lift pump and have good flow of fuel to Carb
Not done anything yet with Carb
think i have the timing right
Any suggestions please
Thanks Keith
the Magneto sparks on the bench but struggles when fitted to make a good spark
I have cleaned all surfaces on the mounting to the engine and to the Mag
Cleaned all the fuel tank and lift pump and have good flow of fuel to Carb
Not done anything yet with Carb
think i have the timing right
Any suggestions please
Thanks Keith
Keith H- Born to be wild
- Posts : 31
Join date : 2022-09-02
Re: Lister A and H3 pump
I assume you are turning it the right way? A common mistake with the A and B engine is to turn them backwards, if you place the plug lead close to the mag body do you get a good spark?
Appletop- Life Member
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Join date : 2010-01-02
Age : 56
Location : Just outside Diss
Re: Lister A and H3 pump
How strong is the spark outside the cylinder, how far will the spark jump, under compression if the spark is weak it generally won't work.
when you say you've cleaned all surfaces what do you mean, base of magneto to bracket should be bare metal, bracket to engine should be bare metal, take a length of wire and trap one end under the magneto, take the other end to a point that is a close to the plug as possible on bare metal, if it works you have a bad connection between the engine mating surfaces. Appletop has told you how to time it assuming your turning the engine in the right direction and you could have the magneto 180 deg out of position.
Maryalice
when you say you've cleaned all surfaces what do you mean, base of magneto to bracket should be bare metal, bracket to engine should be bare metal, take a length of wire and trap one end under the magneto, take the other end to a point that is a close to the plug as possible on bare metal, if it works you have a bad connection between the engine mating surfaces. Appletop has told you how to time it assuming your turning the engine in the right direction and you could have the magneto 180 deg out of position.
Maryalice
maryalice- Life Member
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Join date : 2010-01-23
Age : 70
Location : Bedfordshire
Re: Lister A and H3 pump
Many thanks for the responses
yes i believe i am turning the right way the Magneto is a anti clock version so from the governor side i am turning clockwise to try and start
the mounting bracket and block were painted but i have cleaned of all paint off to try and get a good earth
I have also cleaned the base of the mag to get a good earth
I will try again with the wire to see if this helps
Just as a matter of interest what plug should the engine have can someone advise please
Many thanks again for the help
Regards Keith
yes i believe i am turning the right way the Magneto is a anti clock version so from the governor side i am turning clockwise to try and start
the mounting bracket and block were painted but i have cleaned of all paint off to try and get a good earth
I have also cleaned the base of the mag to get a good earth
I will try again with the wire to see if this helps
Just as a matter of interest what plug should the engine have can someone advise please
Many thanks again for the help
Regards Keith
Keith H- Born to be wild
- Posts : 31
Join date : 2022-09-02
Re: Lister A and H3 pump
I've run my A's and B's on any plug with no issues
maryalice- Life Member
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Join date : 2010-01-23
Age : 70
Location : Bedfordshire
Re: Lister A and H3 pump
Hi all sorry me again
Can anyone advise how what setting should be with the Carb so i can check these
where should the needle wheel be for starting and running
What is the setting for the needle
I do have a spark at the top of the engine now having cleaned loads of excess paint away
Many thanks in advance Keith
Can anyone advise how what setting should be with the Carb so i can check these
where should the needle wheel be for starting and running
What is the setting for the needle
I do have a spark at the top of the engine now having cleaned loads of excess paint away
Many thanks in advance Keith
Keith H- Born to be wild
- Posts : 31
Join date : 2022-09-02
Re: Lister A and H3 pump
The needle is fixed to wheel so when you unscrew it the needle lifts, from closed give the wheel 11/2 to 2 turns, close the choke ring to almost 3/4 the holes, prime the carburettor bowl until full, crank the engine and when it fires slowly close the needle wheel until the engine is running evenly, you may have to open the choke a little but Lister suggest off load to keep the choke partially closed.
maryalice- Life Member
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Join date : 2010-01-23
Age : 70
Location : Bedfordshire
Lister A and H3 pump
Many thanks for this confirmation these are the settings i have been working with
So maybe i just don't have enough compression now as it still doesn't want to run
Thanks again Keith
So maybe i just don't have enough compression now as it still doesn't want to run
Thanks again Keith
Keith H- Born to be wild
- Posts : 31
Join date : 2022-09-02
Re: Lister A and H3 pump
When you turn the flywheels by hand can you feel resistance as it hits the compression, if yes it's got enough, you haven't confirmed that the timing is not 180 degrees out. Can you upload pictures of the engine.
maryalice- Life Member
- Posts : 1235
Join date : 2010-01-23
Age : 70
Location : Bedfordshire
Lister A and H3 pump
please see pictures as requested
I am now thinking it doesn't have enough compression as it doesn't have a great deal of resistance coming to TDC
I checked TDC trough the side cover after the inlet opens and crank key way is also at the bottom as per other peoples comments
will upload more pictures also after this
Thanks again Keith
I am now thinking it doesn't have enough compression as it doesn't have a great deal of resistance coming to TDC
I checked TDC trough the side cover after the inlet opens and crank key way is also at the bottom as per other peoples comments
will upload more pictures also after this
Thanks again Keith
Keith H- Born to be wild
- Posts : 31
Join date : 2022-09-02
Re: Lister A and H3 pump
Have you tried squirting some petrol in the plug hole then replacing the plug and cranking it, or even just squirting some into the air intake. Another thought, when you turn the engine over are the valves opening and closing correctly and is there clearance under the valves when they are at rest and finally lift a valve with a screw driver and then release it, does it snap shut.
maryalice- Life Member
- Posts : 1235
Join date : 2010-01-23
Age : 70
Location : Bedfordshire
Re: Lister A and H3 pump
Have you tried squirting some petrol in the plug hole then replacing the plug and cranking it, or even just squirting some into the air intake. Another thought, when you turn the engine over are the valves opening and closing correctly and is there clearance under the valves when they are at rest and finally lift a valve with a screw driver and then release it, does it snap shut.
maryalice- Life Member
- Posts : 1235
Join date : 2010-01-23
Age : 70
Location : Bedfordshire
Re: Lister A and H3 pump
From what I can see a new set of rings and a glaze busting tool will sort the problem, if your looking for a piston you will need to look in manufacturers catalogues
maryalice- Life Member
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Join date : 2010-01-23
Age : 70
Location : Bedfordshire
Lister A and H3 pump
Yes I do hope so but hope its not to worn
As mine is a later model it has a 4 inch piston and i only see standard rings for sale
Thanks again for your help
As mine is a later model it has a 4 inch piston and i only see standard rings for sale
Thanks again for your help
Keith H- Born to be wild
- Posts : 31
Join date : 2022-09-02
Re: Lister A and H3 pump
Keith H wrote:Yes I do hope so but hope its not to worn
As mine is a later model it has a 4 inch piston and i only see standard rings for sale
Thanks again for your help
Try Cox and Turner Engineering or F.W. Thornton.
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Regards Paul
Tha can alus tell a Yorkshireman - but tha can't tell him much.
Woodsman- Admin
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Age : 73
Location : God's own county
Lister A and H3 pump
All well after stripping the engine down and buying new parts and honing the barrel we have no better compression, so she won't run after a lot of trying
Does anyone know of any companies that can rebore and either reline or source new piston as well
I live in Daventry Northamptonshire
Or does anyone have a Barrel they no longer need
Or any other suggestions how to overcome this problem
Many thanks Keith
Does anyone know of any companies that can rebore and either reline or source new piston as well
I live in Daventry Northamptonshire
Or does anyone have a Barrel they no longer need
Or any other suggestions how to overcome this problem
Many thanks Keith
Keith H- Born to be wild
- Posts : 31
Join date : 2022-09-02
Re: Lister A and H3 pump
One big source of loss of compression is poorly seating valves, I have read through the replies and I can't see a mention of the valve seats being re-ground with grining paste so that they seat well.
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blue cat
blue cat- Life Member
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Join date : 2013-10-10
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