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Bobcat 722 Repower

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Sam from WA

Member
Has anybody ever repowered a 722 with another engine? Mine is getting very tired and refuses to start without a good sniff of ether, and this is with its original Ford 1600 gas engine. I'd like a small diesel to replace the tired gas pot, but at this point I'm just looking for any small 4 cylinder engine with at least 40 horsepower that would fit without having to move the radiator. We were thinking about a Honda 1.6L from like a 91? Civic, I'm looking for any other suggestions.
 
Repowering with an automotive engine is a real challenge because of the electronics. If you go old enough to find an automotive engine without electronics, you may have to hunt far and wide to find something with some usable life left in it.
Might want to go with one of the many stand alone crated engines.
 
i SECOND rAY,S POST.. aUTOMIVE ENGINES ARE NOT GOVERNED OR SET UP FOR INDUSTRIAL APPLICATION. Get you a KUBOTA out of a wor out lawn mower or somethin industrial They are used everywhere.
 
I am not familiar with your machine or its size. If it will fit a 4B Cummins would do a good job. I'd suggest an older one that does not have electronics.
It is the same engine Case IH used in their tractors at the time, it has evolved over the years to meet emissions, etc.
 
The governor will be a challenge if you go to use a car engine. Years ago Toro made their Groundsmaster 72s with a Continental R-839 engine. The R stood for Renault, it was basically a 839 cc version of the same engine they used in the Lecar and later the Alliance. It had a V-belt driven governor, it worked okay- most of the time. W'ed wash our machines when we came off the course, that Groundsmaster would rev to kingdom come for a few seconds when we started it after washing because the governor belt would get wet when the machine was washed.
 
Why not rebuild the old engine. I have the same Bobcat and had no trouble getting parts from Ford Industrial engine. Also all the parts are the same as a Pinto of the same era. Mine runs perfectly.
 
This may be a dumb question, have you tried cleaning or overhauling the carburator?

If a gas engine still needs either to start even after it's fully choked sounds like it is staving for fuel. Maybe I'm missing something.
 
This may be a dumb question, have you tried cleaning or overhauling the carburator?

If a gas engine still needs either to start even after it's fully choked sounds like it is staving for fuel. Maybe I'm missing something.
 
Make sure your old engine really is shot. Is it using oil? Blowby? Is the compression low? Maybe you just have fuel issues. If your engine is bad why not just rebuild the old engine? Or if you want a diesel, were any of those available with a diesel from the factory? If so I'd find that engine, or else rebuild the old one. Adapting different engines to fit will involve designing and building your own adapter plates, adapting drives and clutches and possibly discovering that the engine you installed may not be suitable to the application. Plus a lot of trail and error. I think you will have a lot less headache fixing the old engine. IMHO
 
(quoted from post at 19:04:36 01/26/12) Make sure your old engine really is shot. Is it using oil? Blowby? Is the compression low? Maybe you just have fuel issues. If your engine is bad why not just rebuild the old engine? Or if you want a diesel, were any of those available with a diesel from the factory? If so I'd find that engine, or else rebuild the old one. Adapting different engines to fit will involve designing and building your own adapter plates, adapting drives and clutches and possibly discovering that the engine you installed may not be suitable to the application. Plus a lot of trail and error. I think you will have a lot less headache fixing the old engine. IMHO
Click to expand...

I rebuilt the engine because the head had a crack. I used ceramic liquid mixture and it is as hard as the head now. Had the heads grounded, the valves reseated, had the cylinders honed, new pistons and rings, bottom end bearings, new frost plugs and new seals throughout. Had radiator pressure checked and repainted, New drive belts, got all the gaskets for the motor and all this cost me was about 875 dollars. Where are you going to get a new motor for 875 dollars.
 
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