17.5 hp 42 in. Deck Lawn Tractor – CA Model

Experienced gardeners share their insights in answering this question :
Drain oil… it is full of gasoline due to a bad float pin and rubber gromet in your carb. When your float pin and gromet fail, gas just keeps flowing into your carburetor, eventually flooding your motor with gas and oil mix.

How to Identify and Fix Common Gardening Problems ?

We provide a variety of viewpoints on how to identify and fix common gardening problems. Our sources include academic articles, blog posts, and personal essays from experienced gardeners :

If you`ve noticed your lawn mower smoking and leaking oil, it`s most likely due to a dirty air filter. The air filter in an engine keeps debris and dirt out of it, while the grass and dust accumulate over time. When the air filters are clogged, oil can leak into the engine and out of the exhaust system.
The fuel and air will not mix as well as when your carburetor is balanced. This results in oil and gas spills from the exhaust of the lawn mower. The next time you see black liquid coming out of lawn mower exhaust vents, then this could be due to an imbalanced carburetor.
What causes fuel to leak into my engine oil? The fuel shut-off valve isn`t closed properly. Fuel float in the carburetor being stuck in the open position due to gumming (caused by stale fuel) or debris.
Clogged or Dirty Air Filters

Dirty air filters are one of the most common reasons lawn mowers sputter. Dirt can be present in the apertures that lead from the carburetor and the fuel filter and interrupt the flow of fuel supply to the combustion chamber. You want to be sure to clean or replace dirty air filters.

In such cases, your first step should be to check the air filter, after the mower cools down. If it`s clogged, that means the combustion chamber may not be getting enough oxygen, resulting in a too-rich fuel mixture that will cause the engine to run poorly and even spew smoke.
Your lawn mower`s carburetor regulates the ratio of gasoline to air mixture. If the carburetor isn`t getting enough air, the mixture has a higher percentage of gasoline, which can create black exhaust smoke. It`s possible that a dirty or clogged air filter is preventing sufficient airflow into the carburetor.
Reason: the float is damaged or immersed in gasoline will make the weight and buoyancy of the float change, leading to the rise of the oil surface, causing oil leakage. Exclusion method: replace the float.
Most carburetor problems are caused by a variety of blockages from things like dirt, varnish, and gasoline deposits. It`s easy for the main fuel jet to become blocked, but luckily it`s a pretty easy fix. Regular carburetor maintenance will help you avoid problems in the future.
Don`t overfill the crankcase when adding oil. Too much oil can damage the engine. Briggs & Stratton offers oil specially formulated for your mower and other equipment.
If carburetor problems are causing fuel to mix with your oil in the crankcase, you should perform a thorough cleaning. Find out how to clean your small engine carburetor.
An overfilled crankcase and oversaturated foam air filter will also cause oil to travel from the air filter housing to other parts of the engine. If the mower produces black smoke, then it`s a problem if the lawn mower air filter is soaked in gas. The solution is just to replace the filter.

Discover Relevant Questions and Answers for Your Specific Issue

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How do I remove and clean air filter? – Briggs & Stratton Lawn-Boy 10640 20-Inch 6.5 HP Gas Powered Lawn Mower
ANSWER : There should be a square of plastic on the side of the engine which is opposite of the muffler. It has a small hex head with a slot cut in it. Remove this plastic cover and the air cleaner should be inside of it.

Oil quanity I have 20 hp craftsman briggs and stratton twin how much oil when you change out oil
ANSWER : Usually 1 qt

Oil leaking from under the exhaust mower has been
ANSWER : Souds like the carb needs cleand out it has stuck open and let the gas run in to the moter

Can you put synthetic oil in a briggs and stratton motors
ANSWER : Every time i tried they started to leak

Murray mower belt model 52431×92 – Craftsman 17.5 hp 42 in. Deck Lawn Tractor – CA Model
ANSWER : Get a 1/2″ x 92″ belt

Briggs and stratton 6.5 started smoking so changed oil in hopes would help still smoking
ANSWER : Sounds like it broke a ring to fix better to buy new moter not worth trying to fix

How to start murray 188 lawn tractor – Craftsman 17.5 hp 42 in. Deck Lawn Tractor – CA Model
ANSWER : Need more info. what is it doing or not doing

Help with the lawnmower. It starts and stalls after a few seconds
ANSWER : Check the fuel system clean the carb .