Gasoline in crankcase with oil?

lawredd

New User
I have a 1947 8N tractor, which I use daily or at least weekly.

I am unable to start it, (thank God) because I drained the engine oil an found it dilluted with gasolene. I can't understand how this happened without someone poring gas in the oil spout. However, I do find that gas is missing from the tank. I filled the tank right before it began to fail to start. Any ideas or experience out there?
 

There should be a porous plug in the bottom side of your carburetor air intake. The purpose is to provide a drain for any gasoline that can leak past a faulty float needle and seat. If the porous plug is good you should have a puddle of gasoline on the floor. If the porous plug is plugged you should have a few pints of gasoline run out when you remove the air cleaner tube at the carburetor inlet. For gasoline to get into the engine it would have to fill up and over flow the inlet manifold.

As posted, shutting off the gasoline at the tank is a good practice, especially if the tractor is parked inside.
 
I had it happen when carb leaked. Noticed a drop in oil pressure. Caught it in time drained oil and fixed carb, oil pressure back the normal. It can also happen when the sediment bowl won't
complete shut off and carb is leaking. Shut your fuel off and Crack your rubber tube on your air cleaner and if gas comes pouring out you'll know where the problem is.

Kirk
 
(quoted from post at 02:43:42 01/22/18)
There should be a porous plug in the bottom side of your carburetor air intake. The purpose is to provide a drain for any gasoline that can leak past a faulty float needle and seat. If the porous plug is good you should have a puddle of gasoline on the floor. If the porous plug is plugged you should have a few pints of gasoline run out when you remove the air cleaner tube at the carburetor inlet. For gasoline to get into the engine it would have to fill up and over flow the inlet manifold.

As posted, shutting off the gasoline at the tank is a good practice, especially if the tractor is parked inside.

Thank you all. The older guy that sold me the tractor told me to shut off the gas each time. I forgot to do so when it was stuck out in the pasture. I probably need to rebuild the carburator.
 
After draining the oil and gas mixture from the crankcase, I drained oil from the oil filter case. It appeared to be oil only. Do you have any suggestions for what oil to use to refill, and any other considerations. Thanks.
 
Another reason to have the essential 8N Owner manuals and read, read, read. A few guys here, me and Royse for example, rebuild carbs, distributors, water pumps, governors, et al....ask and you shall receive...

Tim Daley(MI)
 
See tips 6 & 64.

Bruce, maybe it's just me but I'm not seeing tip 64.

mvphoto9468.jpg
 
yes, anytime the needle valve that the float is operated by is either stuck open or just not sealing tight, it will fill up the carb, air filter tube and go into the engine where any intake valve is open.
It is a common thing to have a leaking needle valve. Like the others said, "shut off the fuel" at the sediment bowl when not in use.
 

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