Question about 1993 Suzuki DR 350 S

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Help I have a dr 250s that is putting oil back through the drain line at the bottom of the air box ant one know why

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Make sure it is not overfull with oil(sometimes a flooding carb can put fuel into the sump) or it may be compression blowing past the rings and pressurising the sump,
a small amount can sometimes be normal on very rough terrain

Posted on Mar 16, 2011

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Posted on Jan 02, 2017

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The tractor will start, but runs ruff as if the choke is stuck. When the blades are engadged, it runs worse and can smell gas. Gas smell is in the oil as well.


May not be the carb at all. You have somehow managed to suck gas into the oil. Take the plug out and crank it a few times. It will likely throw excess gas and oil out of the cylinders. I had the same problem with a brand new (5 hrs.) DR Field and Brush Mower that was equipped with a "carbon recapture unit" - a ridiculous new EPA requirement. Rather than a simple vent on the gas cap, these geniuses have put a valve at the top of the gas tank with a hose running back into the carb. No problem until you fill the gas tank and try to mow uphill more than at 25 degree angle. Then, what happens is when the gas level in the tank makes contact with the valve, you wind up with an air filter full of gas and gas/oil in the cylinder. You'll need to replace and gap the plug, drain and replace the oil, install the CRU (if it has one) replace the air filter, and it should be ok. I'm going to bypass this CRU. The EPA, for all the good work they do, gags on a gnat but swallows a camel. Good luck. P.S. My DR is still in the shop.

Mar 23, 2016 | John Deere Riding Lawn Mower. D170 54 in....

1 Answer

Oil sumping on a sportster


Hi Anonymous, it's called wet sumpping. Evo's and earlier engines were famous for oil draining out of the oil tank past the oil pump check ball/valve and into the bottom end when left without starting for long period of time (winter storage). When the bike is restarted the piston downstroke creates pressure in the bottom end which is routed back through the gearcase, up the push rod tubes and into the rocker boxes and finally into the air cleaner where unspent fuel particles are recycled back through the carburator and into the combustion chamber. Oil mist and air are seperated by a baffling system in the cam gearcase compartment. Under normal circumstances there is only a couple ounces of oil in the gearcase and bottom end. If the bottom end has a gallon of oil in it, well you get the picture and the mess. Best way to prevent oil eruptus is to drain it before it has a chance to to relocate and take up residence in your bottom end. Enjoy the new season.

Nov 22, 2013 | Harley Davidson Motorcycles

1 Answer

Oil overflows from crankcase breather


Hi Anonymous, it's called wet sumpping. Evo's and earlier engines were famous for oil draining out of the oil tank past the oil pump check ball/valve and into the bottom end when left without starting for long period of time (winter storage). When the bike is restarted the piston downstroke creates pressure in the bottom end which is routed back through the gearcase, up the push rod tubes and into the rocker boxes and finally into the air cleaner where unspent fuel particles are recycled back through the carburator and into the combustion chamber. Oil mist and air are seperated by a baffling system in the cam gearcase compartment. Under normal circumstances there is only a couple ounces of oil in the gearcase and bottom end. If the bottom end has a gallon of oil in it, well you get the picture and the mess. Best way to prevent oil eruptus is to drain it before it has a chance to to relocate and take up residence in your bottom end. Enjoy the new season.

Sep 06, 2013 | Harley Davidson Motorcycles

1 Answer

Plug on bottom of motor on my 01 dana i drained about a cupful of oil out of then took the 5/8 plug out and drained rest of oil, what is the allen plug for?


Hi Pawpaw32, That plug drains residual oil out of the cam compartment for inquiring minds that want confirmation that metal ants and shrapnell may or may not have taken up residence. Good luck

Apr 17, 2013 | 2003 Harley Davidson FXDL Dyna Low Rider

1 Answer

How do i change the oil in a 2006 chevy cobalt ?


Put car on ramps. On the lowest point of bottom of the motor, you will see a bolt. . Place drain pan under the bolt, and turn bolt all the way out. Drain all the oil out and re measure what you're putting back in. Place 3 and one half liters back in as the filter holds almost a half a liter. Try not to run the car as you may hurt valve seals air filters etc.Good luck let me know how you make out. Please rate this solution Cheers from Nova Scotia!!

Jan 13, 2013 | 2006 Chevrolet Cobalt LT

1 Answer

Oil in the gas tank


Not a big deal. Im assuming this is a 4-stroke push mower and not a leaf blower.
Remove the air box cover, air filter, and air box back plate. Careful there is a gasket on the back of the backplate that if damaged the primer bulb wont work, part # 272653. Remove the fuel line from the carb and drain the tank. Using a 1/2 inch wrench remove the bowl nut from the float bowl on the carb, hold the bowl to the carb as to not break the gasket seal, drain the bowl and replace the bowl nut. If you tried to run the unit and oil is in the cylinder remove the spark plug ( clean the spark plug) and spray some carb cleaner in the hole and pull the starter rope several times to purge the cylinder. Reinstall the spark plug, reattatch the fuel line, install the air box back plate ( leave the air filter and cover off for now), add fresh fuel.
Take unit outside and start, you may need to give it a shot of carb cleaner in the throat of the carb to help it start. It may smoke, it may blow oil out the muffler. Let it run until it quits smoking ( usually around 5 minutes) . Shut it off and complete assembly. It should be fine.

Oct 05, 2012 | Toro Lawn Mower With Toro Power Tools

1 Answer

I need to know how to remove an air filter on a suzuki DR200 year 2000


Take off the side covers , unbolt the seat and remove( two bolts), the air box is under the seat. Flip the two tabs and lift the cover. Unscrew the center wing nut and lift the air filter out. Clean it, re oil it, and put back in, reverse order.

Sep 21, 2010 | 2001 Suzuki DR 200 SE

1 Answer

Cam timing 82 dr 250s


cam lobes have to be pointing out.. and the marks on the cam gear should be lined up ith the head

Aug 09, 2009 | 2001 Suzuki DR-Z 250

1 Answer

HOW TO CHANGE OIL ON A 91 SUZUKI 350


there is a drain bolt on the bottom of the motor.. take it out let all the oil come out and then fill back to the recommended amount or if it has a dip stick fill to the full line

Aug 06, 2009 | 1991 Suzuki DR 350 S

1 Answer

2006 Suzuki DRZ400S oil leak from bottom of air cleaner.


Often times there is a engine breather tube that has to do with emissions that runs from the engine to the air filter breather box. This tube can in some cases blow oil through it when the engine is run hard. Make sure you're not over filling the engine with oil when you change it because this will cause the oil to "blow off" the excess and the air box is where it often goes.
There is also another possibility, are you using too much oil in your air filter after you clean it? This too is a common cause for oil in the air box, if that's the case I would not worry about it.
The last case scenario is one you don't want, that would be washed out rings which cause blow by and that in turn causes the engine to blow oil out of the breather tube which I'm confident it venting into the air box.
Please let me know if these resolve your question and if not give me more details and I will be happy to assist you further.
Regards,
RSelvy

Dec 08, 2008 | 2006 Suzuki DR-Z 400 SM

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