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I am a newbie and have never seen a JA62 before but inherited one this winter.
...wanted to ask if someone can help me get this old JA62 going? I have no manual and I didn't take pictures (which tell more than words)
It stared today buy died after. It started only with the lever at the push bars pushed down.
What does this lever do to the engine?

Carburetor assembly: I am not sure if the existing 2 wire rods are correctly installed in my mower (at the carburetor).
There is Rod1 (wire) at the carburetor coming from in front of the cylinder (which is moving when I push/pull the inner of the 2 levers at the push bar).
And there is Rod2 (another wire) that comes from the back of the engine and ties into the small lever that moves the throttle.
Rod2 has a soft spring to the Rod1 bracket.... so the 2 are connected but I don't know if this is correct.

Clearly if I push/pull the gas lever (left side of push bar) the throttle doesn't move.
Where is Rod2 coming from and what is moving Rod2?

If someone can send me a picture and/or explain how this assembly works ....would be great.

Best, Martin

This is a diagram of the push bar with
A - Blade/Engine Control Lever.
B - Gear Shift Lever (JA62).
C - Throttle Lever (JA62)

just for clarifying the functions: I think I have to hold A and E ?? to the bar in order to start?
And if released it will stop the engine?

So for the carburetor: I'll take a few pictures later today but I think the assembly is not correct as C (throttle lever) should control the throttle directly with the push/pull rod?

if anyone had a picture of the correct assembly I'd be grateful.

Best, Martin

Here are a couple of pictures from the carburetor of my JA62. I hope someone can comment what might be wrong and help me figure out how to solve the problem.
Martin

The pics are poor with you but I have worked out the carb set up.

Welcome to LawnWorld!

We moved your thread to the John Deere forum.

EngineMan said:

The pics are poor with you but I have worked out the carb set up.

Click to expand...

Hi Engine Man,
thanks so much or your diagrams...
Yes my pictures suck big time... I agree. I'll do better when I have a better camera.
Does anyone know what the rod is that is coming from 'behind'... which is directly connected to the butterfly/throttle?
This ones is then connected to the accelerator rod with only a spring... how does this work out?

I thought I could directly move the butterfly with the rod coming from the handle bar..but no.

Best, Martin

The rod that is coming from under the cover it the air vane governor (throttle) which would have a spring, the other rod in photo (photo poor) seems to be fitted to the choke, the choke can work from the carb itself (choke-a-matic) or from the lever.

EngineMan said:

The rod that is coming from under the cover it the air vane governor (throttle) which would have a spring, the other rod in photo (photo poor) seems to be fitted to the choke, the choke can work from the carb itself (choke-a-matic) or from the lever.

Click to expand...

Thanks engine man.
I'll shoot some better pictures today... here are some assumptions and questions in the picture you sent earlier
Martin

Your top question in pic, that is the air vane which is governed by the air flow.
question on the right of pic "rod from throttle lever" the governor spring tends to open the throttle, air pressure against the air vane tends to close the throttle, when you pull this lever (engine running) the forces (balance) between it (lever) and (air vane) is called the governed speed.
question left side of pic, the spring has nothing to do with the choke or choke rod.
your question " Engine is off and the butterfly (round plate in center of carb) is partially open, not closed..is this correct?...answer yes.
and your last question will work correctly, if you have set up all the springs and rods, when you pull on the lever you are pulling against the governor, therefore opening the butterfly.

Thanks again Engine Man!

I could start the engine yesterday.... for the first time.
I primed 2 or 3 times (this rubber ball pumping some drops of gas into the carb) and it started easily.
But the engine didn't seem to be stable...rpm was not constant and (at idle but also under higher rpm) The engine was 'surging'..rpm going up and down.

Another question: Are there new 'tires' available for the mower...in order to climb better. My tires have almost no profile left and the mover has a hard time to climb my New England lawns...

Best, Martin

werminghausen said:

Thanks again Engine Man!

I could start the engine yesterday.... for the first time.
I primed 2 or 3 times (this rubber ball pumping some drops of gas into the carb) and it started easily.
But the engine didn't seem to be stable...rpm was not constant and (at idle but also under higher rpm) The engine was 'surging'..rpm going up and down.

Another question: Are there new 'tires' available for the mower...in order to climb better. My tires have almost no profile left and the mover has a hard time to climb my New England lawns...

Best, Martin

Click to expand...

If the carb has mixing screws then they need to be adjusted, which should help with the surging, if no adjustments then the carb needs a clean out, if all is well with the governor and rods, I can't help you out with the question on the tires has I don't live in the USA.

EngineMan said:

If the carb has mixing screws then they need to be adjusted, which should help with the surging, if no adjustments then the carb needs a clean out, if all is well with the governor and rods, I can't help you out with the question on the tires has I don't live in the USA.

Click to expand...

thanks again,
do you know how to adjust the carb? I mean the mixing screws inside?
Martin

werminghausen said:

Here are a couple of pictures from the carburetor of my JA62. I hope someone can comment what might be wrong and help me figure out how to solve the problem.
Martin

Click to expand...

Here are hopefully some better pictures of the carb.

As I said... the engine is running now but speed is not stable..engine is surging. Need to find the right screw for mixture.

Are people suggesting that the mixture is too rich (too much fuel)?
How do I know if the mixture is right?


Best, Martin

Can't see by your photo if there are any mixing screws, going by the specs there are none.

EngineMan said:

Can't see by your photo if there are any mixing screws, going by the specs there are none.

Click to expand...

Hi Engine Man, thanks for the diagram.
There are 2 versions of this carb? One called 'primer system' on the left of picture and one 'choke system' (right side). My carb seemed to be the left one (primer system) and has probably an automatic choke?

So what would you do with a surging engine?
Take the carb apart and try to clean everything... do I need some new o-rings and gaskets for that job?
Like parts 163A, 975, 276?

I don't think you don't have PRIMER AND CHOKE SYSTEM you have one or the other, only by taking it apart will you know what you need, a carb kit should come with...

163A Gasket
134 valve and seat
137 O Ring (seal)
276 washer

But most of all, you need a good clean carb...!

Hi,
I tried to take the carb apart.
I can remove the bottom screw and washer but the bowl (container with the gas) does not want to come off the body.
I didn't want to use too much force. Do you think I should?
The parts don't seem to be high quality..so I fear I will break something here.
But I need to get the container off in order to clean the inside of it.. I guess.

So I need any seals in case I get this container off?
Best, Martin

Once you have removed the nut from the bowl twist the bowl, and yes renew the seal.