Oil and gas in exhaust

[thoward]

Greetings. 1999 Venture with 38k miles has been sitting up for quite a while (just bought it). Just had carbs cleaned and now have oil and gas blowing out of right exhaust. All cylinders show approximately 120 psi of compression. Can this be caused by an intake problem? It seems this must be related to the recent removal of the carbs. Thanks for your time.

 

Tommy

[Jerry W]

Greetings. 1999 Venture with 38k miles has been sitting up for quite a while (just bought it). Just had carbs cleaned and now have oil and gas blowing out of right exhaust. All cylinders show approximately 120 psi of compression. Can this be caused by an intke problem? It seems this must be related to the recent removal of the carbs. Thanks for your time.

 

Tommy

 

Sounds to me like you have a float that is set wayyyy to high. I was going to say you had a float sticking, but since the carbs were just taken off and cleaned, I am thinking one is set too high.

[RandyR]

I'm going to go out on a limb and say look at the AIS. Do you have a California model?

[stroker ace]

Has it been ridden much or at least run for awhile since the carb. work ? It may just have some residue built up in the exhaust that it is burning out. You could use it for a flame thrower if you could get it to back fire.

[Bummer]

How high is your oil level? It should be right at the middle of the sight glass when the bike's upright. High oil level can sometimes allow oil to wind up in the wrong places.

[N3FOL]

Has it been ridden much or at least run for awhile since the carb. work ? It may just have some residue built up in the exhaust that it is burning out. You could use it for a flame thrower if you could get it to back fire.

If you decide to follow this, make sure you have a fire extinguisher close to you.

[crockettrider]

If you decide to follow this, make sure you have a fire extinguisher close to you.

 

And a video camera...with someone else filming from a distance!

[yamahamer]

I think Bummer is got it! Check your oil level! If it's too much it will blow into the air box. Did the bike come from Sylacauga Yamaha? If so I know the bike and you will need your carbs synced. i'm in bama too if you need anyone to do it PM me. I have a morgan and not scared to use it!

Welcome to the best site for help!

[thoward]

I'm not sure how to tell if it is a California model.

 

I changed the oil and filter using about 3.9 qts.

 

I rode it for about 30 miles after the carb cleaning and the oil and gas was still being ejected from the right exhaust.

 

The bike came from Ocala, FL. Thanks for the offer to use the Morgan.

 

Thanks,

Tommy

[Sleeperhawk]

I'm not sure how to tell if it is a California model.

 

I changed the oil and filter using about 3.9 qts.

 

I rode it for about 30 miles after the carb cleaning and the oil and gas was still being ejected from the right exhaust.

 

The bike came from Ocala, FL. Thanks for the offer to use the Morgan.

 

Thanks,

Tommy

 

Way to much oil, only 3.5 at the most, even with longer filter, still 3.5

[thoward]

Way to much oil, only 3.5 at the most, even with longer filter, still 3.5

 

Good morning. My owner's manual states 3.91 US qts. when replacing the filter.

[Freebird]

Yes, but that is just too much. Don't worry about what the manual says. Just fill it halfway up in the site glass with the bike in the vertical position. Anything more can cause problems.

[Thom]

the owners man. says 3.9 for a completely empty motor like when pulling the oil pan , a little bit of oil stays in the motor , the max would be 3.5 . but some motors take even less , i can only put in 3.2 in mine . check your air filer box and see if there is oil in it if there is than you have put in to much oil . when putting new oil , put in 3 qts. wait about 5 mins. than start the motor run for 1 min , let rest for 2 min , than add enough oil to bring it up to a little below 1/2 way mark .

[Guest Ken8143]

check your air filer box and see if there is oil in it if there is than you have put in to much oil .

 

Thom speak truth. This I know. Skydoc can verify. Oil go only 1/2 way in glass. No more. Very good advice. Do not listen to book. Listen to Thom. Listen to Freebird. Listen to sadder-but-wiser.

[V7Goose]

Most of the comments in this thread are WAY off base for the original post. I'll respond in no particular order . . .

 

First it is 2,000% impossible for the AIS to affect the engine in any way. Period. Its function is the same as a street sweeper following a horse - it makes NO difference if you pick up the road-apples or not, the horse (or your engine) functions the same either way. Being a California model is meaningless for this - the only difference is that the California model has a charcoal canister to absorb gas fumes from the gas tank and carb vents.

 

The comments on the amount of oil are accurate, as far as it goes, but that has NOTHING to do with any oil that may be in the exhaust unless the engine is already total trash. If you overfill this engine (and you WILL over fill it if you follow the manual), it will blow lots of oil mist and particles through the crankcase vent into the air box above the carbs, but those air boxes each have a drain hose. Not only would it be virtually impossible to pump liquid oil up into that air box through the vent, but any amount of oil that doesn't get burned in normal combustion (causing blue smoke in the exhaust, but NOT liquid oil) will drain through those hoses and end up in a spot under the bike in front of and slightly left of the rear shock.

 

The only way you could get actual oil in the exhaust is if the rings were completely gone (or compressed and bound by combustion products), or there was so much liquid oil flowing into the intake port that combustion on one or more cylinders was completely stopped and the liquid oil was simply being pumped through the cylinder and out the exhaust valve. And trust me here - if that was happening, you'd have some more obvious problems!

 

Based on your initial post, you may actually have a problem, but I think it is also equally possible nothing is wrong at all. Most likely all you are seeing is normal condensation from a cold engine collecting in the cold pipe and mixing with the old gunk inside the pipes and blowing out a black oily-looking water. If you are actually getting any raw gas or oil blowing into the exhaust system, the header pipe for one or more cylinders will be dead cold long after the others are too hot to touch.

 

But, since you said someone was messing with the carbs, there are several other possibilities that can be contributing to the perceived problem. One or more floats could be set too high, contributing to an overly rich mixture in those cylinders. Similarly, the enrichment plungers (AKA choke) on one or more cylinders could be hanging up and also contributing to an overly rich mixture.

Goose

Edited December 27, 2009 by V7Goose

[thoward]

Thanks for all the input. I'll report back soon.

 

Tommy

[thoward]

This has been a year-long soap opera. The bike has spent most of that time sitting in my shop with me in denial and acting like it is not really sitting there in my way. I just continued to ride the V-STAR.

 

Here is the very short version. The guy who cleaned the carbs left the pilot jet out of the front right carb. Immediately, it was spewing fuel and oil out the right exhaust. He convinced himself that the cylinder was damaged and advised me to seek a replacement engine which I did. Obviously, that did not solve the problem because we used the original carbs. I took it back to him with no success. I swapped ignition coils and replaced the ignitor, all to no avail.

 

I decided to throw a little more money at it and took it to a different shop and they found the missing jet. I rode it about 100 miles today and all seems to be well. Now all that's left to do is have a "come to Jesus" meeting with the guy who left out the jet.

 

I appreciate all the comments and suggestions.

 

Tommy

[BuddyRich]

Its pretty hard to trash one of these engines. Seems like it was a simple fix the finally got it right. Now ride it a lot:rotf:.