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Old 11-23-2018, 02:06 PM
dtreid dtreid is offline
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Default Kubota rtv x1100c Black Smoke

Just got an rtv x1100. 800hrs.

When the engine is loaded up it rolls coal like I've never seen an rtv do.

I adjusted valves (they were way out), changed air and fuel filters but still it smokes. Tried swapping in some different injectors. No difference.

Any other suggestions?
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Old 11-23-2018, 07:16 PM
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Should add, that the area under that valve cover was pretty sludged up. Not antifreeze in oil custard, just black sludge.
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Old 11-23-2018, 11:15 PM
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You've done more than I thought of right off. Maybe add some sea foam for the next tank of diesel.
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Old 11-23-2018, 11:58 PM
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Have used some diesel purge. Good cleaner....didn't make a difference.
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Old 11-24-2018, 09:30 AM
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carbon build up muffler
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Old 11-24-2018, 10:30 AM
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Is there a way to clean out the carbon?
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Old 11-24-2018, 12:58 PM
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I don't have that model but if the tail pipe comes off, then it probably has a spark arrester internally . If so, take out the bolts and pull straight out . the arrestor is on the internal end of that type of tailpipe and the screen will clog . My old model 2005 rtv 900 also had a plug on the underside of the muffler I would remove it and tap with a rubber mallet, and rev the engine, replace. . My 2011 rtv 900 doesn't though . bordercollie

edit http://www.nettractortalk.com/forums...spark+arrestor there are more threads on the forum you can find them by using the search function at the top of this page.
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Old 11-24-2018, 02:15 PM
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there is a plug on the side of the muffler near the rear . pull the plug and drive aggressively and stop occasionally to tap on the side of the muffler.
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Old 11-24-2018, 06:59 PM
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Heard tell of a paper wasp nest in the air intake hose once, caused a lot of problems ☺☺☺
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Old 11-24-2018, 07:15 PM
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I've pulled that plug on the spark arrestor. Nothing came out.
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Old 11-24-2018, 08:36 PM
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definitely dis assemble the complete intake up to the manifold to make sure there isn't an obstruction. try running it without the air cleaner to see if it makes a difference. also i experienced a similar problem on a caterpillar once that had a shop rag in the intake manifold. black smoke is un burnt fuel. either over fueled or under aired. could be timming.
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