Bobcat 743 Kubota v1702

[country_boy_2007]

I am looking at a bobcat 743 with the v1702 Kubota. hours are unknown but the drives have been rebuilt recently as well as lift cyl's re packed and new pins and bushings in the loader. the machine looks good paint wise. the problem is the owner says its very hard to start, he replaced glowplugs and one injector. it blows white smoke at start up. uses no oil or water, its definatly fuel smoke. hes convinced its low compression due to the previous owner using too much ether. any thoughts on the subject. could this be a fuel issue. a remaned engine is about 4000. and to rebuild it myself will cost around 3k. anyone know of a good source for a good used motor?

 

[antfarmer2]

Put a 2203 in it 51 hp instead of the 36 you have and can get good used ones for under $1500 all day long try ebay or a trucking place they use them in reefers

 

[antfarmer2]

Put a 2203 in it 51 hp instead of the 36 you have and can get good used ones for under $1500 all day long try ebay or a trucking place they use them in reefers

Pick it up and pull on the tire in and out should be no play

 

[antfarmer2]

Pick it up and pull on the tire in and out should be no play

Make sure the glow plugs are gettinng power could be a bad soliniod or loose connection if one plug is bad might not get power to the others

 

[Tazza]

Make sure the glow plugs are gettinng power could be a bad soliniod or loose connection if one plug is bad might not get power to the others

V1702 engines have never been really easy to start.
How long are you glowing it for? and how cold out is it?
If it's not using oil, i'd like to think it may not be too worn and it could be something else.
How does it run when warm?

 

[antfarmer2]

V1702 engines have never been really easy to start.
How long are you glowing it for? and how cold out is it?
If it's not using oil, i'd like to think it may not be too worn and it could be something else.
How does it run when warm?

20 second glow mine fires up in the first rev

 

[country_boy_2007]

V1702 engines have never been really easy to start.
How long are you glowing it for? and how cold out is it?
If it's not using oil, i'd like to think it may not be too worn and it could be something else.
How does it run when warm?

I have gathered that these Kubota engines are kinda hard to start all the time. ok from the top, I have not physically laid eyes on it yet, just pictures and talking to the owner. he seems to be pretty sharp, not a 'I don't know nothing about diesels' kinda guy. im just going to assume hes glowing around 30 seconds and that all the glow plugs are operational. its colder than hell right now, but I gather that he has this issue when the weather is warm as well. I was kind of thinking the same along the lines if it was not using oil it should not be a piston ring or cylinder issue, and if it was in fact low compression, (he never has checked what the compression actually is) that it may just be a valve seat issue or need a head job. I know on my 7.3 idi in my f 350 that cranking speed is critical in starting it. would that be the same in this case as well?

 

[country_boy_2007]

I have gathered that these Kubota engines are kinda hard to start all the time. ok from the top, I have not physically laid eyes on it yet, just pictures and talking to the owner. he seems to be pretty sharp, not a 'I don't know nothing about diesels' kinda guy. im just going to assume hes glowing around 30 seconds and that all the glow plugs are operational. its colder than hell right now, but I gather that he has this issue when the weather is warm as well. I was kind of thinking the same along the lines if it was not using oil it should not be a piston ring or cylinder issue, and if it was in fact low compression, (he never has checked what the compression actually is) that it may just be a valve seat issue or need a head job. I know on my 7.3 idi in my f 350 that cranking speed is critical in starting it. would that be the same in this case as well?

i just spoke to him again, he said once it warmed up it ran fine but had a miss in no. 2 clyender. still smoked white fuel smoke, and acted like it had some power loss going up hill. he replaced the injector but hasn't started it since because its been too cold for him to mess with it.

 

[antfarmer2]

I have gathered that these Kubota engines are kinda hard to start all the time. ok from the top, I have not physically laid eyes on it yet, just pictures and talking to the owner. he seems to be pretty sharp, not a 'I don't know nothing about diesels' kinda guy. im just going to assume hes glowing around 30 seconds and that all the glow plugs are operational. its colder than hell right now, but I gather that he has this issue when the weather is warm as well. I was kind of thinking the same along the lines if it was not using oil it should not be a piston ring or cylinder issue, and if it was in fact low compression, (he never has checked what the compression actually is) that it may just be a valve seat issue or need a head job. I know on my 7.3 idi in my f 350 that cranking speed is critical in starting it. would that be the same in this case as well?

Yes the faster the better mine started hard when I first got it but cleaned up the connections to the glows and ajusted the valves it fires right up

 

[antfarmer2]

Yes the faster the better mine started hard when I first got it but cleaned up the connections to the glows and ajusted the valves it fires right up

He might have fixed it

 

[antfarmer2]

He might have fixed it

There is a little wheel by the injector pump it is a bleeder valve make sure it is closed and not leaking

 

[antfarmer2]

There is a little wheel by the injector pump it is a bleeder valve make sure it is closed and not leaking

Check the air filters too do not clean

 

[country_boy_2007]

Check the air filters too do not clean

he says all the filters have been replaced. a clogged air filter should produce black smoke. hopefully he gats it running and the injector fixed the miss but im not holding my breath. how much blow by would be considered acceptable these kubotas

 

[antfarmer2]

he says all the filters have been replaced. a clogged air filter should produce black smoke. hopefully he gats it running and the injector fixed the miss but im not holding my breath. how much blow by would be considered acceptable these kubotas

Mine has little to none the more it has the more the engine is worn but they can run a long time just hard to start but if your getting it cheap you can put the 2203 for under 1500 get a di if you can

 

[country_boy_2007]

Mine has little to none the more it has the more the engine is worn but they can run a long time just hard to start but if your getting it cheap you can put the 2203 for under 1500 get a di if you can

im not sure if the 2203 is the right option for me. I don't need the extra horsepower tearing the hydraulic pump and drives out

 

[antfarmer2]

im not sure if the 2203 is the right option for me. I don't need the extra horsepower tearing the hydraulic pump and drives out

The extra hp will not tear up anything unless you do it still use the same rpm's

 

[Tazza]

The extra hp will not tear up anything unless you do it still use the same rpm's

I was told years ago that the V2203, with it's extra power can cause the pumps to over heat. I don't see you being able to break it, as the pumps have relief valves, so you can not over load it.
As long as you don't really push it, i can't see you over heating things though.

 

[country_boy_2007]

I was told years ago that the V2203, with it's extra power can cause the pumps to over heat. I don't see you being able to break it, as the pumps have relief valves, so you can not over load it.
As long as you don't really push it, i can't see you over heating things though.

well we will see what happens, im not sure how serious this guy is about selling it, I wanted to come up and look at it this weekend but he said its too cold again so yea . . .