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Discussion Starter · #1 ·
Hi,

My name is Stephane, 37 year old, living in France.
I bought a Massey Ferguson MF 12 few days ago but I don't know the year built.
The metal plate with serial number is disappeared.
Can you help me, please?

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Proud to be Deplorable
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:welcome: to GTTalk.

Without the s/n plate, it's going to be a bit of a guessing game. If you could take pics of a few more angles, it may help someone get close for you.

BTW, Nice looking MF12 there, do you happen to have the seat or is it missing?
 

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Discussion Starter · #3 ·
Hi,

Thank you for your friendly welcome.
Yes, the seat is missing but the Tecumseh HH120 is dead. I bought a Briggs 254427 to replace the original engine.
I will take more pics of this tractor, but at this time in France the sun is down!
 

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Discussion Starter · #5 ·
The magnets on flywheel are gone, the stator is broken, the carburetor is a Solex not genuine part, shroud (with the serial number) is missing, the starter is disappeared.
Here, in France, is very difficult to find this kind of vintage parts.
 

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Hi and welcome I think your tractor was made 1972 to 1976 as that's the only yrs they made MF12 with the Vari-Drive.
 

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starflite said:
The magnets on flywheel are gone, the stator is broken, the carburetor is a Solex not genuine part, shroud (with the serial number) is missing, the starter is disappeared.
Here, in France, is very difficult to find this kind of vintage parts.
Wow, someone was really in it, weren't they? :D
The Briggs will do you a nice job, I'm sure. Is the output shaft the same diameter? That will make your job much easier if it is.
 

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Discussion Starter · #8 ·
The Briggs is a 11 hp 1988, with electric starter, alternator and electric clutch.
The pulley on the clutch is quite the same diameter of the Tecumseh pulley.
The output shat on the Briggs is 1" and on the tecumseh is 1" + few (29 mm)
This MF12 have two headlamps on the radiator grill and two small cone shaped lights just under.
What is it, Vari-Drive?
 

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You may need to shim up the output to handle the difference. I think the original output was 1 1/8" on the Tec engine.

Vari-Drive is a dual belt system using a variable pulley in the middle. The design of the system is very inventive and when properly set up, will give you almost infinite adjustability to your gears. It would eventually be replaced by hydrostatic transmissions in the industry. The MF12 was available both ways.

Note: do not adjust the varidrive handle without the engine running. It can cause adjustment problems.
 

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Discussion Starter · #10 ·
What is the better to do?
Keep the Briggs electric clutch or use the original Tec pulley?
The Briggs is more wide than Tec, and I will have some troubles with the radiator grill.
If I remove the clutch I think the space problem will disappear.
 

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Looks pretty good there, I know of another fellow that has used a Briggs&Statton engine in place of the Tecumseh and his tractor works.
Yon need to use the pulley in the 2nd pic, the one that came with the Tecumseh engine, in order to get the Vari-Drive to work properly.
Also, very important to get the motor mounted in the right spot so that the pulley is the right distance away from the center sheaths.
Here's a picture that shows where it needs to be, this is where they were originally placed.
Plus or minus a 1/4" is close enough.
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Discussion Starter · #15 ·
Hi DH1,

The pulley will be at 1/4" about the original position, I checked this morning.
The Briggs output shaft is a little bit high than Tecumseh, about 3/4".
I need to machine a sleeve to fix the Tecumseh pulley (1 1/8") on the Briggs output shaft (1")
 

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starflite said:
Hi DH1,

The pulley will be at 1/4" about the original position, I checked this morning.
The Briggs output shaft is a little bit high than Tecumseh, about 3/4".
I need to machine a sleeve to fix the Tecumseh pulley (1 1/8") on the Briggs output shaft (1")
Good stuff sounds like your going to get it to work good.
 

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Discussion Starter · #17 ·
I don't have the owner manual, can you explain me how working the operating handle on right side?
Thank you

This is another pic of the Briggs position, sorry the engine is very dirty!!
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Discussion Starter · #20 ·
Thank you very DH1 and HH81, for advises and your kindness.
I will fix the engine on the tractor and try it. And during the winter I would like to paint it with the original color.
I will try to find the manuals as you told me.
 
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