Why does my 6.5 hp kohler lawn mower keep pulling oil into carb air filter

if engine is not overfull you have bad rings on piston have to take in to have it done may end up short blocking it witch is cheaper to do replace rings cheaper by far 200.00 per cylinder

it could be lack of air or fuel either or. i would clean the carb and replace air filter and fuel filter that should fix the problem

their are a few different filters for your rider --these are for the kohler 26 hp motor stores like home depot- lowes- sears- or small engine repair shops carry filters K&N PS-1002 http://www.sears.com/ayp-genuine-ayp-part-578416804-oil-filter-kohler-cou/p-SPM8242278631?redirectType=SKIP_LEVEL http://www.knfilters.com/oil_filter/all/kohler/sv735/26hp

water in thew gas will do that or dirty carb water in bowl

Excess air or not enough air. Replace air filter. Spray outside of carb to clean & ensure choke movement is smooth. Water in gas may cause this also. Flush out tank, refill with fresh gas, always use Stabile.

replace the needle valve in the carb the fuel we get now melts the seal off the valve then change the oil

check the solenoid on the bottom of the carb check for movement and power if it moves and has power open the carb and clean it

if engine is briggs use briggs sae 30 oil also change out filter use briggs black std oil filter or yellow filter if els version

if engine is kohler use kohler 10w/ 30 oil and use kohler oil filter

if its honda use 20w/50 oil and use honda oil filter

if its kawasaki use 20w/50 and use kawasaki oil filter


cheers pauly 46

I am working on one now. Customer said "it doesn't run". Ok. So, after oil/spark plug/air filter replacement...it didn't have any gas getting to the carb. Took off the bowl, and on this 2005 lawnmower, the inside of ALL of the carb was covered with a white/chalky film. Looked like tiny rust barnacles over ANY metal surface available. Silty white stuff in bowl. Blasted it all w/carb cleaner. Still couldn't get primer to work, but after I sprayed a bit o' starter in the cylinder, it started well & kept running. Until I let the bar down. Needs a new carb. Will see what the customer wants.

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It means that either not enough gas is getting into the engine. The gas you pump in when you prime is enough to start the engine but not to keep it going.


There could be several things that cause this.
1. Old fuel:
Solution: Replace the fuel. Dump out the old stuff. If it is a year old it won;t work.

2. A dirty carburetor:
Solution: Clean the carburetor.
Easy carb clean:
Pull the bowl off and use carb cleaning solution to clean it. (you can buy carb cleaning solution a Wal-Mart in the automotive section. I have also heard acetone will work but I have not tried it.) Make sure not to loose the little parts like the pin.

Better carb clean:
pull the carb off the machine and clean each part with carb cleaner. There is a youtube video someone else posted on how to do this.

3. Your gas/air flow is not adjusted properly.
To check:
Pull off or out the air filter. Try to start it.
Solution:
If the machine runs longer there are two options: The air filter is dirty so replace it, or the air flow is not adjusted proberly. There should be a screw like thing sometimes called the "main jet" that you turn to adjust the air flow. It is on the carburetor side or bottom.
If the machine dies faster or won't start there is probably too much air flow and by removing the filter you added more air. Adjust the "Main Jet" as above.