Kubota B6000E Smokie Exhaust: Kubota Review  -- Kubota Tractors Discussion Forum and Review Kubota B6000E Smokie Exhaust: Kubota Review -- Kubota Tractors Discussion Forum

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 04-12-2002, 06:22 Post: 37319
Steve Mahler
2002-04-12 06:22:09
Post: 37319
 Kubota B6000E Smokie Exhaust

I have a late 70s B6000E in mint condition that seems to always run a little smokey. Under normal conditions you cannot see the blue tint to the exhaust, but on a sunny afternoon it is quite visible. The machine runs great, and I am told by the previous owner that the injectors are only a year or two old. Is this normal for an older diesel?






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 04-12-2002, 07:40 Post: 37324
TomG

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 Kubota B6000E Smokie Exhaust

Diesels can make white, black and gray smoke as well as blue. Each colour may indicate a different type problem. Blue is oil, which might be expected on a high hour engine. However, an engine can run years burning a bit of oil. One solution is just wait for the compression to get so low that it becomes hard to start.

A bit of gray exhaust that puffs during acceleration and warm up is fairly normal. My 600-hour tractor doesn't have blue exhaust. However, diesels like to run hard, and mine will start puffing more gray exhaust if it's been doing a lot of chugging around loader work. It used to puff a fair bit before I found that the thermostat was stuck partially open. The engine wasn't coming up to operating temperature under most workloads. Diesels also may cool down below operating temperature if idled at low rpmís for extended periods. Then they start smoking. For that matter, they donít warm up at low rpm no matter how long the warm-up.

Setting the valve clearances further reduced the puffing. These things are prety easy to check and adjust, and they will make a diesel smoke if they're out of adjustment. An injector spill time adjustment also could be performed but the procedure is more complex.






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 04-18-2002, 11:40 Post: 37595
Steve Mahler
2002-04-18 00:00:00
Post: 37595
 Kubota B6000E Smokie Exhaust

Now that Spring has arrived with a heat wave, I spent 3 solid hours mowing at high RPM, and the smoking seems to have stopped. Is it possible that I am running around a low RPM too much, never letting it warm fully and burn off carbon? The little diesel has so much torque down low that I never even approach half throttle for pulling a wagon, pushing snow, etc. Maybe I need to throttle up once and a while?






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 04-18-2002, 12:49 Post: 37598
Murf

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 Kubota B6000E Smokie Exhaust

Steve, I think you hit the nail on the head, as my friend (neighbour?) TomG put it, they like to work, not just idle around. I would suggest that "mint" also probably means 'really low hours' and 'never really worked hard'. The other aspect is that if indeed you don't put much time on the little beast the fuel is probably not fresh, and the rings may be a little sticky. IMHO, I would add a generous amount of top-quality fuel additive and find an excuse to give it a good run now & then (tell your wife I said so). Best of luck.






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 04-18-2002, 19:05 Post: 37605
Morgan
2002-04-18 00:00:00
Post: 37605
 Kubota B6000E Smokie Exhaust

I have a B6200 similar to B6000E and I always run it a full engine speed. It torques the implements better and gives the hydraulics the pull pressure. To adjust speed I just change gears.

Also starts better at full throttle. I always keep it set on full rabbit and no turtle. (Except when I get off the tractor to move a rock, etc.)






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 04-19-2002, 05:59 Post: 37619
TomG

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 Kubota B6000E Smokie Exhaust

Glad a bit of a run seemed to fix it up. I think of operating temperature and load as more important than just high RPM, but maybe somebody knows for sure. However, all these factors tend to overlap anyway.

Almost all of diesels puff a bit on acceleration even when warm, but I know mine almost completely stops puffing for several weeks following my ten mile road trips to our camp. I keep the RPM near max, and my 650-lbs. forklift and loader I carry plus some sizable hills give the engine a pretty good run. I suppose plowing or rotary cutting would be better runs.

I'm not sure that full throttle gives the highest torque on many engines. I'd guess that engineers would tend to peak up the torque around PTO RPM, but then there's often not a low of difference between the max no-load rpm adjustment and PTO RPM. Fairly high throttle settings do help starts--especially in cold weather. It's sort of like a diesel choke--more fuel instead of less air. What the higher throttle positions do is keep the governor from reducing the fuel supply as soon as the engine catches and starts gaining rpm's.






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 04-19-2002, 10:22 Post: 37641
DRankin



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 Kubota B6000E Smokie Exhaust

Check the link below. I am really impressed with this stuff. I get mine from the local NAPA auto part store, but it is also available online. It cut the smoke output on my engine by 95 percent, makes starting much easier and made the engine so much quieter that I can hear the valve train now.






Link:   Click Here 

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 04-19-2002, 19:52 Post: 37654
Morgan Wright
2002-04-19 00:00:00
Post: 37654
 Kubota B6000E Smokie Exhaust

Steve, your smoking came from incomplete combustion of diesel fuel. Maybe there were carbon deposits in the valves or something, but they have burned through now. Sounds like promblem is solved.

I'm interested in learning about the B6000E, you say it's from the 1970's when Kubota first started selling tractors over here. How big is the engine (in cc's, it should be marked on the tractor). My B-6200 is a little 3 cylinder job with 855 cc's. It falls midway in size between the modern B-7500 (1001 cc's) and the B-7400 (741 cc's)






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 04-20-2002, 07:44 Post: 37667
TomG

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 Kubota B6000E Smokie Exhaust

Thanks for the link Mark. I saved it to rear later. I'll try to compare the product to what I use, but mine also has anti-gel. The shrinking seal issue might be important to think about.






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 04-30-2002, 15:17 Post: 37972
Steve Mahler
2002-04-30 00:00:00
Post: 37972
 Kubota B6000E Smokie Exhaust

My B6000E is a 2cyl, 12.5hp with 6F 2R manual; 2WD. The original owner ordered it new with the 48" Woods belly mower and 42" Kubota (woods designed) tiller. He had a john deere 214 with a snowblower so never used the machine in the winter, stored in a heated garage/shop etc. The deere died, he bought a new BX with a snowblower, and sold me the mint little B6000E. I was looking for something larger, but the price was right and the condition hard to pass on. I have added a back blade, dirt scoop, and boom pole to round out it's duties on my 40 acres of trails and fields. I will look at the plate and post the exact displacement. Nice little rig that I will probably keep even after purchasing a more appropriate (deere 790 or L-series kubota) tractor.






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Discussion Boards > Active Subjects > Messages as Posted > Kubota Review Forum

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billtreat 1 | D Wilburn 2 | DH83 1 | DRankin 2 | kthompson 1 | Morgan 1 | Morgan Wright 1 | Murf 1 | Steve Mahler 4 | TomG 5 |




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