Oil blowout - diagnosis? - Snowblower Forum : Snow Blower Forums
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post #1 of 18 Old 12-15-2014, 02:31 PM Thread Starter
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Oil blowout - diagnosis?

My friend has a Craftsman 9/28 that is 8 yrs old. He changed the oil this fall and there was no oil leak afterwards.

He used the blower last night (2" of snow) and thought he smelled oil but noticed nothing else. A few minutes later the blower seemed to be slipping. He tried different gears with no luck so he parked it. Today he saw oil on the floor and the level was a little low on the dipstick. He pulled the pan cover off the bottom and there was quite a bit of oil on the friction disc and wheel. It was probably slipping from the oil SO that was why it stopped moving.

He doesn't feel that he overfilled the oil when he changed it and no leak after the oil change. I iooked at it today and don't see anything suspicious. Can't tell the oil source for sure but maybe the side opposite the recoil starter handle?

He cleaned everything up and used gasoline on a rag to clean the friction disc. He let it sit for a while in the normal position after being tipped up to redistribute the oil. I saw him blowing snow to test it so he will see if there is still a leak.

Any idea what happened?
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post #2 of 18 Old 12-15-2014, 02:46 PM
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maybe he blew out the oil seal on the sump cover
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post #3 of 18 Old 12-15-2014, 03:03 PM
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Did he by any chance switch to a synthetic oil ?????? With a machine that old, it may be leaking out of crankcase oil seal ??
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post #4 of 18 Old 12-15-2014, 03:06 PM
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I'm sure he did but, did he check the oil level after cleaning everything up? If his snow blower does not have a fuel shut, the carb may have leaked gas into the sump during the summer and rose to the point of the oil coming out the breather hose on the crankshaft side of the motor. This is ASSUMING his machine has a flat head motor. This is why it is VERY important to check your oil BEFORE each use.

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post #5 of 18 Old 12-15-2014, 03:16 PM
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Maybe he just spilled some oil when filling it up.


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post #6 of 18 Old 12-15-2014, 03:28 PM
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Possibly blowing out the breather tube?




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post #7 of 18 Old 12-15-2014, 09:02 PM Thread Starter
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I don't know all the details on type of oil, etc. I talked to him after he cleaned everything up. He used the blower for a while after the clean up and it ran fine. No oil leaked out while it was running or after he shut it off. He parked it on cardboard and will see if any oil leaks overnight.
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post #8 of 18 Old 12-15-2014, 09:50 PM
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Quote:
Originally Posted by CO Snow View Post
I don't know all the details on type of oil, etc. I talked to him after he cleaned everything up. He used the blower for a while after the clean up and it ran fine. No oil leaked out while it was running or after he shut it off. He parked it on cardboard and will see if any oil leaks overnight.
We will wait until morning.......cardboard will speak !!
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post #9 of 18 Old 12-15-2014, 10:27 PM
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When he runs it, gently pull the dip stick and see if any positive crankcase pressure, there should be none.

The pressure will force oil out various gaskets. If so, possible blown head gasket or worn rings.

Also make sure the bottom oil fill cap/caps is tight.
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post #10 of 18 Old 12-16-2014, 06:27 PM
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The guy behind me had that happen on his 9hp 28" Craftsman.
He said the breather tube is located where it will blow oil on to the disk plate'
He add a piece onto his to direct all possible oil to blow out under the plate.

I don't know why his blew oil out, overfilled it a little?

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