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Old 12-13-2012, 12:22 PM   #1 (permalink)
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Over oiling?

I have a 96 xlt. The center cylinder is drowning in oil so bad it bogs of the line.
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Old 12-13-2012, 02:28 PM   #2 (permalink)
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You sure your not jetted rich? If one cylinder is getting too much oil all of them are not just one cylinder.


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Last edited by Polaris650freak; 12-13-2012 at 02:45 PM.
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Old 12-14-2012, 07:46 AM   #3 (permalink)
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Oil consumtion should be about 1 qt of oil to 12.5 gal of gas (50-1)
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Old 12-14-2012, 10:43 AM   #4 (permalink)
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The center cylinder plug is squeeky clean, the other two tan in color. The center carb has oil residue. Idles greate. Good top end. Off idle bog. Stock jetting. Clean carbs with new needle and seats. One turmn out on idle mixture screw. Good spark. Belt is questionable. Origional clutch springs. Crank twist 60 thousandths. 130 psi all three cylinders. 2400 miles. Starts like a champ. I also evicted the mice!
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Old 12-14-2012, 10:45 AM   #5 (permalink)
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Only have 20 miles on it myself. Not enough to measure oil consumtion
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Old 12-14-2012, 10:46 AM   #6 (permalink)
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I was just in janesville, wi today in fact
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Old 12-14-2012, 10:55 AM   #7 (permalink)
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What brought you to this ghost town lol


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Old 12-14-2012, 10:56 AM   #8 (permalink)
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Horse show in beloit
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Old 12-14-2012, 12:29 PM   #9 (permalink)
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Quote:
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The center cylinder plug is squeeky clean, the other two tan in color. The center carb has oil residue. Idles greate. Good top end. Off idle bog. Stock jetting. Clean carbs with new needle and seats. One turmn out on idle mixture screw. Good spark. Belt is questionable. Origional clutch springs. Crank twist 60 thousandths. 130 psi all three cylinders. 2400 miles. Starts like a champ. I also evicted the mice!
Where is the residue? The oil is injected into the case and mixes with the fuel inside the motor. So, residue on the carb doesn't necessarily indicate an over-oiling condition.

One thing that happened with some of the XLTs was actually an UNDER oiling condition with one of the outboard cylinders (forget if it was mag or PTO side). The fix for it was to add another oil line to that part of the motor. Polaris actually made the change at the factory for the 97 model year (problem still present in 96).
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Old 12-14-2012, 12:48 PM   #10 (permalink)
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There is an oil line after the carb isnt there. The oil is on the carb slide. Possibly the oil is just a symptom of a different problem. Why would it get back to the carb in the first place unless it was getting blown back?
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Old 12-14-2012, 12:51 PM   #11 (permalink)
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The under oiling issue with the. 96's i think was on tho pto side
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Old 12-14-2012, 12:52 PM   #12 (permalink)
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Blow back can happen. A friend with an XLT gets some blow back from his carbs.

What you COULD have as an issue is the previous owner may have upped the oil output from the pump to compensate for the low oil condition (instead of adding the oil line). The result is that the "normal" cylinder is now getting more oil than it should.

Have you checked the indexing of the oil pump to see if it has been advanced from the stock setting?
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Old 12-14-2012, 01:18 PM   #13 (permalink)
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I actually adjusted it up to the marks on the pump when i had the carbs off for cleaning. I think i need to talk to previous owner to see if it ran normally before. Maybe i made a mistake somewhere cleaning and reinstalling the carbs
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Old 12-14-2012, 01:22 PM   #14 (permalink)
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That certainly wouldn't hurt.

Which way did you adjust the pump? Did you increase or decrease oil output?
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Old 12-14-2012, 02:06 PM   #15 (permalink)
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Increase til the marks lined up
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Old 12-14-2012, 02:07 PM   #16 (permalink)
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And you verified that the second journal mark lines up correctly at WOT?

When did you find the oil on the carb slide? Before or after (or both) adjusting the oil pump?
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Old 12-14-2012, 02:37 PM   #17 (permalink)
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They line up At wot.
I didnt run it in the snow before removing the carbs because it sat a couple years before i got to it.
Think i'll pull them back down and check my work
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Old 12-14-2012, 02:41 PM   #18 (permalink)
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I think that your plans of talking to the previous owner are smart, and pulling the carbs again certainly wouldn't hurt.

While you're at it, and if you didn't before, double-check the choke plungers and the throttle cable adjustments for the main slides. You want to be sure that the carbs are completely in sync.

Wouldn't hurt to check the vent lines and airbox as well to be sure there's no blockages. And, while you're at it, check out the pulse line, fuel pump, and the fuel lines to each carb. It's "busy work", but sometimes will expose an issue that you want to fix.
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Old 12-14-2012, 04:38 PM   #19 (permalink)
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I'll bet that there is no spark under pressure..
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Old 12-14-2012, 04:41 PM   #20 (permalink)
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I'll bet that there is no spark under pressure..
Ok. You've sufficiently piqued my curiosity...

Is this a known thing with these motors? Or, are you thinking this because of things that you've read here for specifics?

More importantly... What's the cure if that's the issue? CDI? Caps? Plugs?
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