Long cranking on cold start

[twiskus]

I have a 2006 463 that I just got and on a cold start, it really wants to crank for awhile before starting. I am turning the key one turn to allow the pre heat function to do its job for about 5-10 seconds, but it will still crank sometimes and not start. Then I cycle the pre heat again and it seems to fire quick. Is this a fuel pressure issue or glow plug problem? Thanks! Trev

 

[twiskus]

Forgot to mention it has about 1630 hours, doesnt smoke at all ans runs awesome. Trev

 

[lfutrell]

Forgot to mention it has about 1630 hours, doesnt smoke at all ans runs awesome. Trev

I don't think 5-10 sec. is long enough, most preheat for a min. of 20 sec.

 

[twiskus]

I don't think 5-10 sec. is long enough, most preheat for a min. of 20 sec.

I'm starting to see that. The odd thing is that it is much warmer out now, and back when it was in the 50's, I was borrowing my friends Mustang 2076 (I think that's the right number) and that thing just fired up without pre heating. Maybe a different setup?

 

[Bobcatdan]

I'm starting to see that. The odd thing is that it is much warmer out now, and back when it was in the 50's, I was borrowing my friends Mustang 2076 (I think that's the right number) and that thing just fired up without pre heating. Maybe a different setup?

The little guys start hard, sounds normal to me. Glow at least a count of ten anytime the engine is stone cold. I did a service on the green bay packer's S70 yesterday, 80 degrees out and I had to glow it and it is practically new with 71 hrs.

 

[budtoh3zo]

The little guys start hard, sounds normal to me. Glow at least a count of ten anytime the engine is stone cold. I did a service on the green bay packer's S70 yesterday, 80 degrees out and I had to glow it and it is practically new with 71 hrs.

small diesels have to much cold metal close to the combustion compaired to the big guys is what was explained to me years ago. it just pulls all the heat out made in the compression and no fire. now the big guys have bigger cylinders a lot more air to heat in the compression stroke and the cylinder walls are farther away from the fuel source so the air there keeps enough heat to lit off. right or wrong just something I heard and remembered

 

[twiskus]

small diesels have to much cold metal close to the combustion compaired to the big guys is what was explained to me years ago. it just pulls all the heat out made in the compression and no fire. now the big guys have bigger cylinders a lot more air to heat in the compression stroke and the cylinder walls are farther away from the fuel source so the air there keeps enough heat to lit off. right or wrong just something I heard and remembered

**UPDATE** Good info to note. I did start it stone cold last night after I let the plugs pre heat for about20 seconds. It started right up. I used the machine a good 20+ minutes in 85-90 degrees, turned it off, came back to it about 10 mites later and i didn't let it glow (didn't think I had to at operating temp) and they damn thing just cranked! I let it glow for 20 seconds, then I cranked about 10 seconds and let go and it started...I had this happen twice last night...what the hell? Trev

 

[twiskus]

**UPDATE** Good info to note. I did start it stone cold last night after I let the plugs pre heat for about20 seconds. It started right up. I used the machine a good 20+ minutes in 85-90 degrees, turned it off, came back to it about 10 mites later and i didn't let it glow (didn't think I had to at operating temp) and they damn thing just cranked! I let it glow for 20 seconds, then I cranked about 10 seconds and let go and it started...I had this happen twice last night...what the hell? Trev

On another note, I did notice that when I did try and start it again after it was warm, I had the throttle still up on full boar...is that causing too much fuel at startup and causing the long long cranking? Trev

 

[jerry]

On another note, I did notice that when I did try and start it again after it was warm, I had the throttle still up on full boar...is that causing too much fuel at startup and causing the long long cranking? Trev

Have you checked all the glow plugs? One bad one will do that also.

 

[Tazza]

Have you checked all the glow plugs? One bad one will do that also.

I don't believe diesels flood like petrol engines do, so i can't see that being an issue. When it cranks, do you get smoke?
When it's not hot enough, it will puff white smoke.

 

[twiskus]

I don't believe diesels flood like petrol engines do, so i can't see that being an issue. When it cranks, do you get smoke?
When it's not hot enough, it will puff white smoke.

I have not checked the glow plugs...unfortunately, they seem to be on the inside of the machine, nearly impossible to access..any tips? I have never noticed any smoke at all on start up or when running whatsoever... Trev

 

[twiskus]

I have not checked the glow plugs...unfortunately, they seem to be on the inside of the machine, nearly impossible to access..any tips? I have never noticed any smoke at all on start up or when running whatsoever... Trev

Okay, so I think here is the issue: I assumes that this bobcat was like a diesel truck where you turn the key to the right once and that is what pre heats the glow plugs. I didn't realize there was a rocker switch to use to pre heat! So, do I turn the key to the right or the left and hold that switch in to pre heat? It is a 2006 463. Thanks! Trev

 

[Tazza]

Okay, so I think here is the issue: I assumes that this bobcat was like a diesel truck where you turn the key to the right once and that is what pre heats the glow plugs. I didn't realize there was a rocker switch to use to pre heat! So, do I turn the key to the right or the left and hold that switch in to pre heat? It is a 2006 463. Thanks! Trev

Generally, key to the left is for glow, then to the right to start.
When the engine is too cold, when it cranks it will puff out white smoke.