Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Hi my name is ***** ***** welcome to Just Answer . L when it's smoking is it a white smoke ? Also can you check the oil and tell me if it's thin or smells like gasoline
Sure , no problem
Ok , is it smoking bad when running ?
Does irt smell like oil etc ?
I'm wondering if you have a valve issue can you get the engine model number etc ?
My first concern was a carburetor issue , these engines carburetors will leak gas in the crankcase and mix with the oil , causing it st smoke and run terribly
But you did say the oil doesn't smell like gas .
Should have something like a cv640 for the model
Ok I am going to pull a breakdown of the engine
Oil doesn't have a strong smell , that's why I'm concerned about it being the carburetor. Was this the first time trying to use it this year ? Also was the gas tank empty ?
You can , does the tractor have a fuel shutoff valve ?
Let me check the carburetor to see if we can find a way to see if the choke plate is working
It is common , it happens because the rubber tipped needle doesn't seal with the brass inlet valve. Most times ppl have no clue as they are mowing until It locks up or smokes etc
No in most cases either the rupper tip on the needle swells or cracks or the brass inlet valve wears being brass so when the float closes the needle goes up into the inlet valve but gas continues to weep so ot overfill the bowl and runs down into the crankcase
So here is a diagram
Part 19 is the air filter housing , it may have to be removed to verify the choke plate is moving
Yeah that's the first thing to check
Should be a few bolts
Here is a link to download the service manual
The carburetor choke plate looks to face the front of the tractor right ?
Just so your aware just answer charges more for phone calls , I wasn't sure if your aware or not
Yes. , on most kohler they have a Fer 3/8 or 7/16 bolts holding the cover on
On your gas tank is it 2 bolts holding it or a bar like thing ?
Ok on a troy bilt I'm working on which is owned by mtd too it has 2 bars in front of the tank coming up to meet in the center and 1 bolt holding it on
That's terrible , I'm really sorry to hear that about your wife . You can respond to me on here whenever , it will notify me so no rush on my end
Ok sounds good
Let's change the oil and see if it will run ok , if it does we know gas is getting in that oil
It could be the carbs but thin oil is usually gas getting into the crankcase
Sorry , yeah it can be a disaster . My makes a thing to change the oil , it's like a half piece of pipe that slides under the drain , I'll try to find the link to one