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Would A 5 Hp Engine Work On A Mf 14?


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#16 TUDOR OFFLINE  

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Posted August 31, 2014 - 04:07 AM

I can't say for sure, but I don't think I could bolt it to the flywheel of the B&S. And, since it is recoil start, it would probably be difficult. I'm I correct in assuming that?

Install the engine with the flywheel in front. Before you hook up the drive shaft, remove the charge pump and turn it upside down. It's labelled LH and RH for rotation. One is for driving the hydro from the engine flywheel and the other for driving from the engine PTO. Don't forget to turn it back when you reinstall the Kohler.

 

It doesn't take a whole lot of power to do what you plan and 5 hp should do the job nicely considering that the hydro will deliver about 4 hp to the ground. My Husqvarna grass cutter can only deliver about 2.75 hp to the ground and it will tow a 2000 lb trailer with little effort.

 

Big horsepower numbers are for powered implements. The tractor alone uses only a fraction of the power available for the drive, and 4 horses is a lot of power for the drive. Although fast acceleration won't be one of it's claims to fame, it will pull an impressive load.


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#17 GTTinkerer OFFLINE  

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Posted August 31, 2014 - 04:58 AM

Some of the B&S 5 hp horizontal engines had two shafts coming out the back.  The smaller of the two shafts rotated in the opposite direction of the larger shaft and was an extension of the engine's camshaft.  Might be possible to use the smaller shaft but it only rotated at 1/2 the speed of the larger shaft.  The engines were normally found on rototillers and the smaller shaft was used to rotate the tines in revere to back up the tiller.


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#18 MH81 ONLINE  

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Posted August 31, 2014 - 06:47 AM

Install the engine with the flywheel in front. Before you hook up the drive shaft, remove the charge pump and turn it upside down. It's labelled LH and RH for rotation. One is for driving the hydro from the engine flywheel and the other for driving from the engine PTO. Don't forget to turn it back when you reinstall the Kohler.
 
It doesn't take a whole lot of power to do what you plan and 5 hp should do the job nicely considering that the hydro will deliver about 4 hp to the ground. My Husqvarna grass cutter can only deliver about 2.75 hp to the ground and it will tow a 2000 lb trailer with little effort.
 
Big horsepower numbers are for powered implements. The tractor alone uses only a fraction of the power available for the drive, and 4 horses is a lot of power for the drive. Although fast acceleration won't be one of it's claims to fame, it will pull an impressive load.

  

Some of the B&S 5 hp horizontal engines had two shafts coming out the back.  The smaller of the two shafts rotated in the opposite direction of the larger shaft and was an extension of the engine's camshaft.  Might be possible to use the smaller shaft but it only rotated at 1/2 the speed of the larger shaft.  The engines were normally found on rototillers and the smaller shaft was used to rotate the tines in revere to back up the tiller.


Thank you Bob and Bill. Two examples of thinking outside the box and making it work!

Bob, if they had the LH and rh built in, why have it coupled on the flywheel side? Attachments usage on the shaft?
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#19 TUDOR OFFLINE  

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Posted August 31, 2014 - 03:17 PM

  
Thank you Bob and Bill. Two examples of thinking outside the box and making it work!

Bob, if they had the LH and rh built in, why have it coupled on the flywheel side? Attachments usage on the shaft?

 

With air cooled engines, air flow is from the flywheel side to the PTO side and it prefferable to move heat away from the operator's station. The engine rotates clockwise as seen from the operator's position in most GT's.

 

With liquid cooled engines, the engine can be turned around with the rad close to the operating station and the fan blowing rad cooling air forward over the engine and out the grill, again, away from the operator's station. The engine rotates counter clockwise as seen from the operator's station.

 

The way the charge pump is constructed, it will operate in either direction, but only if it is oriented correctly. The hydro will work backwards if the swash plate linkage is not also reversed by disconnecting the lever at the hydro and turning it 180° on the U type Sundstrand. The MF 14 uses the inline type hydro and the same result can be achieved by turning the motor section upside down without disturbing the swash plate linkage and possibly running into clearance issues for the rest of the control linkage.

 

There are 12 bolts involved for the inline type hydro, 4 for the charge pump (don't lose the charge pump drive pin), 4 to remove the hydro from the final drive, and 4 to split the hydro for rotating the motor section. The hydro has 3 basic parts, the pump section (including the charge pump), the center section (about a 1" thick plate of cast iron), and the motor section. Only the motor section gets turned.

 

In this orientation, powered implements work in reverse, but that's academic. Five horsepower will not drive the PTO driven implements that normally come with a 14 hp tractor with any satisfaction. It will be a tug or pusher only until the fresh engine is installed and the mods made are reversed.


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