| Author | Message | ||
| Rob Leight (Robleight)
Rating: N/A |
Latley, my kubota 15kw has been emitting a hazy and strong smelling exhaust. The air filter is clean, fuel filter's clean, and fresh oil. What else could be the problem? | ||
| Geoff (Geoff)
Rating: N/A |
You might try cleaning the injector nozzel tips, and/or having them tested. Worst case is low compression causing the smoke/stench. How many hours do you have on the engine, or worse, did you happen to overheat it? --Geoff '82 RTS CA | ||
| TWODOGS (Twodogs)
Rating: N/A |
15K...that's a big unit....probaby doesn't work to hard...could be too much idle time | ||
| John Jewett (Jayjay)
Rating: N/A |
Sounds like the old "water in the cylinder" trick to me. Check compression (if possible) to see if you have a cracked cylinder wall/head or leaky head gasket. Let us know what you find out, Okay? Cheers...JJ | ||
| TWODOGS (Twodogs)
Rating: N/A |
a diesel engine is like a woman... give her a job or...there is going to be trouble can't see cranking that big unit up unless you are going to run A/C or a bunch of electric heaters...or power a small city... | ||
| FAST FRED Rating: N/A |
"my kubota 15kw has been emitting a hazy and strong smelling exhaust" Sounds like "Wet Stacking" which is what happens when a diesel is mostly used at 10%-25% of its designed load. Rebuild will restore compression from fuel washed, burnished cylinders and gunked rings. But the "best" cure would be to install a realistically sized noisemaker , or increase the usual load 500% to 1000%. If you camp a lot a set of "buddy plugs" (actually sockets) to run 3 or 4 other campers coaches electric loads would help. FAST FRED | ||
| Jim Bob Rating: N/A |
I agree with the light load scenario. A diesel needs to be broken in at 75-95% load for the first 50 hours. After that, it needs a minimum 30% long term load to keep the rings sealed, etc. Most diesel exhaust will be "a little" hazy anyway, not clear like a gas engine, especially one more than 5-8 years old. The EPA mandated lower emission levels have caused engine makers to refine combustion chamber design & reduce power output from a given engine to achieve clean exhaust. Every one of the 30 or so engines we use have been redesigned in the last several years to comply (Northern Lights Generators). One small diesel had its max KW rating reduced 12% to help reduce smoke. Best solution would be if you could design your exhaust to exit above the roofline. ($1-1.5 million dollar Millenium Coach routes exhaust out through interior to roof to eliminate stink & smell at ground level. Jim-Bob | ||
| Rob Leight (Robleight)
Rating: N/A |
Sorry about the late response...out on the road this past weekend. To answer some quesitons, it has 14,000 hours on it, and runs 3 roof-top AC units + all appliances. In the winter, runs a 3-ton forced heat unit. I know it's old, but the manufacturer says they can last 20,000 hrs. if maintained. I will check injectors and compression. | ||
| Stephen Fessenden (Sffess)
Rating: N/A |
My John Deere 2640 tractor has over 20,000 hours on it and it has hazy exhaust, and has for the last 10 years. It needs a rebuild. I don't think the manufacturer expects the engine to be "like new" for 20,000 hours. I would live with it until there are more problems. | ||
| Geoff (Geoff)
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The noxious smell of a worn out diesel makes me sick-- there is nothing worse for me than getting behind a worn out diesel on the freeway that is polluting the air. For the same reason I don't think it would be very nice to run a genset in a campground that is worn out with a smelly exhaust. --Geoff '82 RTS CA | ||
| Mike (Busone)
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Run veggy oil in it then it will not smell so bad. You might have wildlife coming looking for the fries though.  | ||
| Richard Bowyer (Drivingmisslazy)
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Geoff, first time I have ever heard of a diesel mechanic who did not love the smell of diesel. You are a disgrace to your profession! LOL Richard | ||
| TWODOGS (Twodogs)
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honestly tho...smell is a very important thing...you can tell a sick engine..with that many hours...would be asking around to see if it's a wet sleave engine & how much a kit is..14,000 hours = almost a million miles... | ||
| Geoff (Geoff)
Rating: N/A |
Actually, Richard, it works the other way around. The more you are exposed to noxious fumes, the less you can tolerate them. Ask a painter! --Geoff |