Baby Tractor Looking for an Engine..

[JTMachineDesign]

I was gifted a 60s era Sears garden tractor with a totally seized engine. It has a belt-driven 4 speed trans-axle.
I'd love to get it going from the grand kids to putt around with.. might even be able to pull the shaker-screen sand sifter I'm designing.
I'm not an originality nut so I'm not married to getting the old engine running, would be good with replacing it entirely BUT
the motor shaft is on the right... all the motors I've seen for sale in the 9hp +/- range have the shaft on the left.

Anyone know of an engine in the 9hp range with the shaft on the right?

(I did find an air-cooled single-cylinder Diesel engine with the shaft on the right but it was pricey - way cool though.)

 

[Rebeldad1]

Try harbor freight. They have several choices for motors. Havnt heard any negatives about the motors either.

 

[WranglerX]

Not sure about you shaft on the right statement, it appeared the actual out put shaft is same as all small motors, the shaft on the right or in front of cooling shroud is probably for belt drive for electric starter....Personally I would forget electric start and just go with recoil starter for grandkids and your putt around "thing"... If really married to electric concept you can probably have adapter made to put a pulley on flywheel side. Have you pulled side cover off and looked at shaft arrangement ?

Cheapest new motor is going to be at harbor freight.....

8 HP (3?1cc) OHV Horizontal Shaft Gas Engine EPA/CARB

6.5 HP (212cc) OHV Horizontal Shaft Gas Engine EPA

For kids toy I think the 6.5 HP would be more than adequate.

Dale

 

[JTMachineDesign]

Try harbor freight. They have several choices for motors. Havnt heard any negatives about the motors either.

Tried there first.. I like their motors.. they turn the wrong way

 

[JTMachineDesign]

Not sure about you shaft on the right statement, it appeared the actual out put shaft is same as all small motors, the shaft on the right or in front of cooling shroud is probably for belt drive for electric starter....Personally I would forget electric start and just go with recoil starter for grandkids and your putt around "thing"... If really married to electric concept you can probably have adapter made to put a pulley on flywheel side. Have you pulled side cover off and looked at shaft arrangement ?

Cheapest new motor is going to be at harbor freight.....

8 HP (3?1cc) OHV Horizontal Shaft Gas Engine EPA/CARB

6.5 HP (212cc) OHV Horizontal Shaft Gas Engine EPA

For kids toy I think the 6.5 HP would be more than adequate.

Dale

Not a kids toy, but grandchilden will probably drive it.. I'll probably hookup the sand machine and have them drive it around.. I'm a grandpa that knows how to get something done while they're having fun

 

[i7win7]

Home - Small Engine Warehouse
Think they can help you repower small tractor

 

[radios1]

Tried there first.. I like their motors.. they turn the wrong way

ccw facing the shaft is normal. I don't see why they would make an engine with a reverse rotation, since it would be a very limited market for those, also, these are clones of Honda engines...

 

[WranglerX]

Not a kids toy, but grandchilden will probably drive it.. I'll probably hookup the sand machine and have them drive it around.. I'm a grandpa that knows how to get something done while they're having fun

Its ok with me, you can call it anything you want.... But I think you analysis of engine rotation is flawed.... I have yet to see in my 75 years a one lungers that is anything other then clockwise rotation from flywheel side (counter clockwise from shaft side) ....

Once you get tractor running, show us your "sand machine"...

Dale

 

[JTMachineDesign]

Once you get tractor running, show us your "sand machine"...

Dale

Back in the 70s I was camping on a socal beach and woke at 3am to the sound of an engine moving slowly. Curious, I got up to see what it was. There was a monster wheeled tractor creeping up and down the beach grooming the sand. It used a blade cutting through maybe an inch of the surface that was vibrating is such a way that the sand (and beertabs, ciggybutts, and various and sundy other non-sand items) worked it's way up to a screen that the sand would drop through and debris would continue to a catch bin.
Now I'm in the process of moving to my retirement home full time, that shares the Joshua Tree National Park's north border. It's a terraced acre of DG/Sandy soil. Left alone the place starts to get erosion lines, wind-blown desert debris, etc... hand raking gets old so, I thought I'd recreate that beach-groomer on a smaller scale. I tried a land-plane type of rig and that worked, but all the debris bits are still there..

 

[Frank Surber]

That shroud is covering a belt drive the starter would most probably be a starter generator combo. A new electric start engine will have a built in dynamo generator and a Bendix to flywheel driven starter mounted on the side of the engine. it may or may not require a separate solid state voltage regulator some engines come with one mounted on the engine.
If it were me I would go with something in the 10 to 14 hp range gasoline or 8 to 11 hp diesel

 

[WranglerX]

That shroud is covering a belt drive the starter would most probably be a starter generator combo. A new electric start engine will have a built in dynamo generator and a Bendix to flywheel driven starter mounted on the side of the engine. it may or may not require a separate solid state voltage regulator some engines come with one mounted on the engine.
If it were me I would go with something in the 10 to 14 hp range gasoline or 8 to 11 hp diesel

I also had most recent thought about that to....... It would also be a clue to engine rotation, remove cover, remove belt, jump battery to starter/generator (?) and see which way it rotates....

Dale

 

[fidowanttobe]

First thing, pull the head and see how bad it is.

 

[CoyPatton]

In looking at both of your pictures you posted, I believe that on the flywheel side (left side as you seat in the seat) you have an old style starter/generator unit attached to a pulley on the flywheel.
On a new/modern engine, this will be nonexistent! The starter will engage on the bottom of the flywheel and have a generator under the flywheel. You would likely need a voltage regular if using electric start.
These are educated guess as it is all difficult to see behind the shroud.
If you decide to go with a pull cord start motor, it is much simpler to upgrade the motor.
On the shaft side of the motor (right side as you sit on the seat) I believe your rotation will match the rotation of a modern engine. You issue here will be either matching shaft size to fit existing pulley or a new pulley to match existing pulley size for a new motor with a different size shaft. Either approach should be doable.
To check my guessing, remove the shroud, remove the belt and jump power to the starter generator, watching for rotation of the pulley on the started. Then go to a pull rope motor and check its rotation direction. I believe you will find they match and a getting running fir whatever usage is as simple as finding the size motor you wish to install.

 

[Frank Surber]

I also had most recent thought about that to....... It would also be a clue to engine rotation, remove cover, remove belt, jump battery to starter/generator (?) and see which way it rotates....

Dale

As far as I can remember all small engines I have ever seen always had the same rotation but that is not to say that some couldn't have had the opposite just don't think I've ever seen one that did

 

[PILOON]

As far as I can remember all small engines I have ever seen always had the same rotation but that is not to say that some couldn't have had the opposite just don't think I've ever seen one that did

Believe you are correct.
Only last couple of years I have seen (forget brand) snow blowers that had rotated opposite way.

 

[i7win7]

As far as I can remember all small engines I have ever seen always had the same rotation but that is not to say that some couldn't have had the opposite just don't think I've ever seen one that did

If you did, bet it was a Sear's engine. Seen/had Sears products with non-standard parts.

 

[Frank Surber]

Here is A Sears Suburban tractor which is probably near the same age as yours with a Kohler engine
here is a picture of a Kohler engine with the belt guard similar to yours
Sears may have done a lot of things but their engines were made by an engine manufacture
Even the sears outboard engines were made by Johnston or Elgin they just had their brand on them

 

[JTMachineDesign]

Here is A Sears Suburban tractor which is probably near the same age as yours with a Kohler engine
here is a picture of a Kohler engine with the belt guard similar to yours

Close but not quite there.. we were able to get the model number off of it today.. it's a Sears Super 12

also, verified that the drive to the tranny runs anticlockwise when the tractor is moving forward so that's good, but it looks like the tranny is shot I can only find reverse and one forward gear. Starting to look like a money pit. pity

 

[WranglerX]

Close but not quite there.. we were able to get the model number off of it today.. it's a Sears Super 12

also, verified that the drive to the tranny runs anticlockwise when the tractor is moving forward so that's good, but it looks like the tranny is shot I can only find reverse and one forward gear. Starting to look like a money pit. pity

These things usually are , that is why they get abandoned.....

Dale

 

[radios1]

Close but not quite there.. we were able to get the model number off of it today.. it's a Sears Super 12

also, verified that the drive to the tranny runs anticlockwise when the tractor is moving forward so that's good, but it looks like the tranny is shot I can only find reverse and one forward gear. Starting to look like a money pit. pity

if you do machine design, it will be easy to fix the transmission!.. it's a manual transmission, so it's either the shifter fork or stripped gears, which can be made on a milling machine..