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I have an MTD lawnmower with a Briggs and Stratton engine. The engine model number is 12H802, 0652-01
I am trying to repair it because it wouldn’t start. It has been sitting idle in the shed for a few years now.
I changed the needle seat and needle. I cleaned every crevice and hole with carb cleaner and a small piece of wire.
It starts but it still revs either too high or too low. It needs the springs for the throttle and governor.
I don’t know what or how many springs I need I don’t know where they go. . And I can’t find a good pic of this engine
Can anyone post a picture?
Thanks
Paul

I'm pretty sure the information you want, is in this manual, see sections, 3 & 4. Keep us up-dated !

https://drive.google.com/file/d/0B6NaqjIxWV1ycG8wd0s3Z2Q2X00/view

wow-that is a very long document. It has tooooo much information.
I can't figure anything out inn there.
here is a pic of the top of the carb.

It looks like it is missing a connecting rod (the thing with the big loop in it. And a spring.
If anyone could give me the part numbers of the missing parts, that would be great.
Also I would need to know what holes in the picture I labeled to put the spring or rod into.
Thanks

merc68 said:

wow-that is a very long document. It has tooooo much information.
I can't figure anything out inn there.
here is a pic of the top of the carb.
View attachment 32957
It looks like it is missing a connecting rod (the thing with the big loop in it. And a spring.
If anyone could give me the part numbers of the missing parts, that would be great.
Also I would need to know what holes in the picture I labeled to put the spring or rod into.
Thanks

Click to expand...

Yes I agree, the manual IS a bit overwhelming for a "new" to this agenda. Briggs makes hundreds of engines with hundreds of different linkage configurations, getting the right one is the key. it's hard to distinguish what model carb you have with just the overhead shot you took. The pic is fine but a few more at different views would be very helpful
there are many variations of these carburetors.

here are a few more pics of the carb, with and without the filter) I hope it helps
Looking thru the manual again from sections 3, 4, and 5, I gather it is a LMS carb with a dual element filter.
I hope these pics can help determine that. Note also the pic with 2 springs. I fixed (or tried to, LOL) 2 mowers so I don't know if these springs actually go to this carb.
Thanks

You need governor linkage part number 691829 which hooks into an arm under the blower housing on the fuel tank end of the engine. The carb end connects into the black circle on number 1 on your picture. The spring then connects to the eye in the linkage and the hole at number 2 on the picture. part number for the spring is 699056.

numbers 3 and 4 in your picture is where the kill switch goes on engines that don't have a engine brake. Like what is used on pressure washers etc.

great--thank you
with your instructions and finding the parts on line I finally understand.
Now all I have to do is find that arm under the blower LOL

I let you know how I make out when I get it running

It might be easier to TEMPORARILY remove the blower housing ( shroud) to assist in seeing everything, might want to check your eng. cooling fins for debris /clogging while it's off . ..:thumbsup:

ILENGINE said:

You need governor linkage part number 691829 which hooks into an arm under the blower housing on the fuel tank end of the engine. The carb end connects into the black circle on number 1 on your picture. The spring then connects to the eye in the linkage and the hole at number 2 on the picture. part number for the spring is 699056.

numbers 3 and 4 in your picture is where the kill switch goes on engines that don't have a engine brake. Like what is used on pressure washers etc.

Click to expand...

Isn't that the governor linkage rod sitting under the crank case vent tube in picture 6.
That set up is different to what we get down here.
And we rarely see a mechanical governor push mower engine.

A LESSON LEARNED ..??

merc68 said:

here are a few more pics of the carb, with and without the filter) I hope it helps
Looking thru the manual again from sections 3, 4, and 5, I gather it is a LMS carb with a dual element filter.
I hope these pics can help determine that. Note also the pic with 2 springs. I fixed (or tried to, LOL) 2 mowers so I don't know if these springs actually go to this carb.
Thanks

Click to expand...

NOT trying to "rub it in" but perhaps if you had taken these pics of the carb BEFORE ..work on it began, you could have avoided this "hiccup" .. I tell people to ALWAYS take pics of whatever you work on , they become a "reference-manual' you can always delete them , but they may also prove helpful to someone else ..such as in your case !!

I marked in red where one spring goes and circled in red the spring I think goes there. The other spring is way too clean to belong on a mower in my opinion.

I don't think either of the springs belong on that mower.
The shinny one is off an Honda.
The other is way too long.
Something is wrong with the whole set up, like the throttle shaft is in backwards. I just can not put my finger on it.
In 4 years & 200 push mowers I have only had 1 or 2 with the mechanical governors so I stayed out of this from the start.

This thread has a similar carb setup: http://www.lawnmowerforum.com/showthread.php/43564-Carburetor-Linkage-Plastic-Piece-broken

OK I think .... I said THINK !!, ... I found a few pics that might be the same as yours .

...

I don't know if this helps or not, BUT I sure hope you and anybody else following this thread has learned a lesson..!!

TAKE PICTURES BEFORE YOU DIS-ASSEMBLE ANYTHING, the magic word is BEFORE !!
That way you will have reference pics to save your ARSE !!

I think cpurvis is correct with the other thread. You are missing the governor rod.

BlazNT said:

I think cpurvis is correct with the other thread. You are missing the governor rod.

Click to expand...

This pic looks like you can see the governor rod hanging down , right under the bolt head and green clamp on the
breather hose ...Chuck, Bert, .... is THAT what you see as I do ..??

Boo that looks like the governor linkage in the picture. It looks either bent out of shape or the part from the eye to the Z is missing Possibly the eye is one the other end because somebody installed it backwards.

Boobala said:

This pic looks like you can see the governor rod hanging down , right under the bolt head and green clamp on the
breather hose ...Chuck, Bert, .... is THAT what you see as I do ..??

View attachment 33122

Click to expand...

Yeah looking closer at photos enlarged, in THIS photo it appears the rod is showing between the fuel line markings
but the fuel line itself is blocking the view , it almost appears the end of the rod has an upward swing (part of the "loop")
where one end of the spring connects. I must have looked at 3 or 4 hundred pics of linkages, so many my eyes were
going crazy, I just can't figure out why people in this day of digital cameras , don't take pics of what they're working on,
OH I forgot, friggen "selfies" are important , NOT reference pics !!

ILENGINE said:

Boo that looks like the governor linkage in the picture. It looks either bent out of shape or the part from the eye to the Z is missing Possibly the eye is one the other end because somebody installed it backwards.

Click to expand...

Arrh Backwards. thats it.
It looked funny but I could not work out why but of course, the loop for the spring is missing so backwards it must be.

We are all in agreement. Sweet. Now lets see if we can get it fixed.

Boo has the latest blowup of the picture, and the linkage is there and in the correct orientation, but is tucked down under the breather tube. Can see the eye of the linkage in the picture.

Bert I have seen people take that linkage off and reinstall it turned 180 degrees from correct

I have several of those engines laying around, I'll take some pictures tomorrow if I remember. I might need a reminder though :laughing:.

primerbulb120 said:

I have several of those engines laying around, I'll take some pictures tomorrow if I remember. I might need a reminder though :laughing:.

Click to expand...

You musta been out pickin oranges yesterday when we REALLY were into this , better late than never... :laughing:

Boobala said:

You musta been out pickin oranges yesterday when we REALLY were into this , better late than never... :laughing:

Click to expand...

I was out mowing. No oranges on my trees right now :ashamed:

primerbulb120 said:

I was out mowing. No oranges on my trees right now :ashamed:

Click to expand...

Alright Mr. Bright N Early, ..... hows bout gettin your dupa movin, N gettin those linkage/springs pics posted , this has been your reminder ... :biggrin: ..

Here you go:







This engine doesn't have an adjustable throttle, but the springs still go in the same place.

Here's one with a manual throttle control. It's an Intek so the setup is a little different, but the basic idea is still the same. Rod with a loop in it attaches to the throttle, spring hooks through the loop and the other end of the spring attaches to the speed adjustment tab. (Just look at the pictures, they explain it better than me .

merc68 said:

here are a few more pics of the carb, with and without the filter) I hope it helps
Looking thru the manual again from sections 3, 4, and 5, I gather it is a LMS carb with a dual element filter.
I hope these pics can help determine that. Note also the pic with 2 springs. I fixed (or tried to, LOL) 2 mowers so I don't know if these springs actually go to this carb.
Thanks

Click to expand...

Shiny silver spring does not belong to this engine. I think it's from a Honda.

primerbulb120 said:

Shiny silver spring does not belong to this engine. I think it's from a Honda.

Click to expand...

Clyde, you really helped out on this thread, sure hope this fella sees it after all we've gone through to help, the teamwork
sure makes a difference , anyway Clyde , do you save your pics like this for future reference or just delete after you post
them, ... just curious . :thumbsup:

Boobala said:

Clyde, you really helped out on this thread, sure hope this fella sees it after all we've gone through to help, the teamwork
sure makes a difference , anyway Clyde , do you save your pics like this for future reference or just delete after you post
them, ... just curious . :thumbsup:

Click to expand...

Interesting question! I'll probably keep them till my camera SD card runs out of storage space and then delete them. I don't need them because I already know how everything goes together, and if I were to need more pictures I'll just go take some more. I have 4-6 of those engines right now, and if I get rid of them all I'll somehow end up with more. :biggrin:

I think we lost the OP a week ago, but I have had fun anyway.
I bookmarked this thread because we do get a few of these "where does it go " posts.

bertsmobile1 said:

I think we lost the OP a week ago, but I have had fun anyway.
I bookmarked this thread because we do get a few of these "where does it go " posts.

Click to expand...

Yeah Trev, I rat-holed all the associated pics on to my flash-drive for Lawn-Equipt. ...Someday down the road ..???
I enjoyed all the members goin in it together, ... "brotherhood" ..at it's best , Eh ???

Looks like you are missing a spring and the governor rod.

kwgerloff said:

Looks like you are missing a spring and the governor rod.

Click to expand...

You sir ... need to read a few of this threads PREVIOUS posts ! It's over-cooked !