Oil can enter the carburetor due to several factors, such as a worn or damaged engine component, like piston rings or valve seals, which allows oil to leak into the combustion chamber. This can lead to oil being drawn into the carburetor during the intake stroke. Additionally, excessive crankcase pressure can push oil vapor through the breather system into the carburetor. Lastly, improper tuning or flooding of the carburetor can also contribute to oil accumulation.
No, never oil the carburetor linkage. Clean the linkage throughly with carburetor cleaner. If you oil the linkage it will become clogged with dust which the oil will attract.
Too full of oil or gasoline is getting into the oil. This is caused by a bad needle valve & seat inside the carburetor. Can also be a clogged vent filter. Replace the vent filter.
Make sure fuel is getting too the carburetor. The carburetor might not be getting fuel or it could possibly be getting too much fuel. Adjusts the carburetor.
In a 1980 MG, you typically do not put oil directly into the carburetor itself. Instead, you should ensure that the oil level in the engine is correct and that the air-fuel mixture is properly adjusted. Some models may require a small amount of oil in the dashpot of the SU carburetor, usually about 1-2 teaspoons of specific carburetor oil. Always refer to the owner's manual for specific maintenance instructions.
Carburetor needle valve probably leaking while engine is not running causing gas to run down the cylinders into the crankcase.
Ask Someone at Lowes
Marvel Mystery Oil works well.
form_title= Nissan Carburetor form_header= Replace your Nissan carburetor with help from experts. When was the last time your oil was changed?*= _ [50] Do you need a new or used carburetor?*= () New () Used Have you noticed any problems with your Nissan?*= () Yes () No
under the carburetor
The most likely cause for gasoline in the oil is a defective carburetor float and/or needle valve. When defective they fail to completely stop the fuel flowing into the carburetor when the engine is stopped and sets for a week or so. The fuel slowly flows from the carburetor into the engines combustion chamber and eventually ends up in the crankcase with the oil. DO NOT run the engine with gas in the oil or it will be destroyed. Purchase a rebuild kit for the carburetor or bring it to a small engine shop and repair the problem. Change the oil, run for 10 minutes and then change it again to ensure there is no residual gas in the oil. Kevin
the valves or rings are allowing compression blow by to enter the crankcase which causes excess pressure that is brought to the carburetor by the breather tube. your engine is getting tired or you have too much oil in the crankcase.
Some models have an auto shut off when the oil is low, check the oil, also check the carburetor. Make sure you are getting gas, check the spark plug gap.