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Oil Misting Out Of Breather On Mf8


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#1 millwright OFFLINE  

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Posted April 07, 2012 - 07:10 PM

i have a mf8 that i got from someone they said that it was blowing oil out of the breather so i honed out the cylinder and put a new set of rings in put it all back together ran for a couple minutes no problem and then i had mist coming out the breather. could this be a valve seal problem or did i not get the cylinder walls clean enough . the cylinder walls were kind of rough but i got the worst of it out. need help thanks

#2 JDBrian OFFLINE  

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Posted April 07, 2012 - 07:15 PM

Is the breather assembled properly with the filter and baffle in place. If they are missing or assembled wrong then you could still get oil mist from the crankcase.

#3 millwright OFFLINE  

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Posted April 07, 2012 - 07:19 PM

thanks for the advise i will check that out.

#4 DH1 ONLINE  

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Posted April 07, 2012 - 07:23 PM

I think you should run it a while, use it, give it a chance to break-in.

#5 JDBrian OFFLINE  

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Posted April 07, 2012 - 07:23 PM

Behind the cover there should be a gasket and a piece of filter then a concave plate with holes in it. If the plate or the filter are missing then the breather will not work properly. According to the diagram I have the holes in the plate should be on the pulley side of the engine not on the flywheel side.

#6 GWest OFFLINE  

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Posted April 08, 2012 - 03:43 AM

There was a service bulletin in 1989 (Kohler) and 1990 (Wheel Horse)

2.1 All K181 and M8 specifications have been changed to call for two pieces of breather
filter, P/N KH10036 (Kohler PIN 231419) instead of one. Testing has shown the use of two
filters prevents oil drops from being expelled through the breather system. When servicing
these engines, two filters should now be used.


Garry

Edited by GWest, April 08, 2012 - 03:43 AM.


#7 JDBrian OFFLINE  

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Posted April 08, 2012 - 07:01 AM

An MF8 should have a Tec. HM80 as the motor not a Kohler.




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