743 wont start

I just purchased a 743 and a lot of the time it wont start. Previous owner told me about it and said he had to spray a little starting fluid just about everytime to get it to start. It will start everytime if I use starting fluid but I'd like to fix the issue. What do y'all think could be the problem? I would also like to find an owners manual that I can download. Any advice is much appreciated

First don't use starting fluid if need something use wd40 ........are you useing the glow plugs and have you blead the air out of the system and turned the valve off

antfarmer2 said:

First don't use starting fluid if need something use wd40 ........are you useing the glow plugs and have you blead the air out of the system and turned the valve off

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Try pumping primer. Is there fuel there? Could put clear fuel hose in does fuel bleed down? Could be a bad check valve. Other thought is low compression when our743 was getting tired it would only start on either but that had 12000 hrs

farmshop said:

Try pumping primer. Is there fuel there? Could put clear fuel hose in does fuel bleed down? Could be a bad check valve. Other thought is low compression when our743 was getting tired it would only start on either but that had 12000 hrs

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I would check the fuel system first then glow plugs hope it's not the compression

antfarmer2 said:

I would check the fuel system first then glow plugs hope it's not the compression

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When it starts, does it run well?
Ensure the glow plugs are getting power and that they actually glow right to the tip. With those hours, it is possible they are worn/burnt out or the compressios is low.

Tazza said:

When it starts, does it run well?
Ensure the glow plugs are getting power and that they actually glow right to the tip. With those hours, it is possible they are worn/burnt out or the compressios is low.

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Pump the rubber bulb primer with the knurled valve on the injector pump open. The bulb should be full of fluid and you should hear fuel dumping into the tank as you pump. Close the valve before you start the engine. Unless it is cold right now where you live the glow plugs should not even come into play.

I just purchased a 743 that would not start. I had to put in new solenoid and rewire, all the way to the glow plugs. When that was done I rewired the started solenoid and put in the diode so when I turned the switch to left the glow plugs would activate, when the switch was turn to start the engine the glow plugs was also be activated durning the start up process. After the rewiring the Kubota starts like it was new. I would have some one turn the key to the left and check the power (blue/black wire going to small center bolt on solenoid ) going to glow plug solenoid and then check the power (white wire going to start solenoid center post and from that post there should be at wire with a diode going to the glow plug solenoid) when turn to the start position. If no power to these wires start chasing to connector behind seat. These solenoid a are to the left of starter under the air filter canister. Hope this helps I just went thorough this.