kohler engine problem


J

jfdubois

-------------------------------------


I have a 3 year old kholer courage 20hp engine in a Husqvarna lawn tractor.
Today, the engine started to push oil out of the crank case breather tube
which is right above the carb causing it to stall. I took the air cleaner
off and started the engine and the oil coming out of the breather tube
went as far as 2 feet from the engine. It is fresh oil and a new oil
filter. The oil is clean (not black). Any ideas on what I should try to
fix this problem?
 
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J

jamesgangnc

-------------------------------------

I have a 3 year old kholer courage 20hp engine in a Husqvarna lawn tractor.
Today, the engine started to push oil out of the crank case breather tube
which is right above the carb causing it to stall. I took the air cleaner
off and started the engine and the oil coming out of the breather tube
went as far as 2 feet from the engine. It is fresh oil and a new oil
filter. The oil is clean (not black). Any ideas on what I should try to
fix this problem?
Did you check the oil level? Sounds like too much oil in it.
 
C

clare

-------------------------------------


I have a 3 year old kholer courage 20hp engine in a Husqvarna lawn tractor.
Today, the engine started to push oil out of the crank case breather tube
which is right above the carb causing it to stall. I took the air cleaner
off and started the engine and the oil coming out of the breather tube
went as far as 2 feet from the engine. It is fresh oil and a new oil
filter. The oil is clean (not black). Any ideas on what I should try to
fix this problem?
First things first - how much oil did you put in the engine?
What is the current oil level in the engine?
If higher than spec, and higher than you put in, does it smell like
gasoline, and is it thin????
My educated guess, from YEARS of experience, is the carb float stuck
and your crankcase is chock-block full of gasoline.
 
O

Oren

First things first - how much oil did you put in the engine?
What is the current oil level in the engine?
If higher than spec, and higher than you put in, does it smell like
gasoline, and is it thin????
My educated guess, from YEARS of experience, is the carb float stuck
and your crankcase is chock-block full of gasoline.
....or

Crankcase breather is dirty / clogged
Piston ring gaps are aligned.
Piston rings are worn.
Broken piston ring (s)?
 
C

clare

...or

Crankcase breather is dirty / clogged
Piston ring gaps are aligned.
Piston rings are worn.
Broken piston ring (s)?
All 4 are possibilities - but NONE would generally cause oil to shoot
2 feet out of the breather. (because, with oil at the proper level,
there is NO oil up there to be blown out).

Not a betting man, but if I was I'd put money on a carburetor problem.
Particularly on a 3 year old Kohler.

On a poorly maintained 6+ year old Tecumseh or a 10+ year old Briggs,
perhaps a piston problem
 
S

Stormin Mormon

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J

jamesgangnc

 All 4 are possibilities - but NONE would generally cause oil to shoot
2 feet out of the breather. (because, with oil at the proper level,
there is NO oil up there to be blown out).

Not a betting man, but if I was I'd put money on a carburetor problem.
Particularly on a 3 year old Kohler.

On a poorly maintained 6+ year old Tecumseh or a 10+ year old Briggs,
perhaps a piston problem- Hide quoted text -

- Show quoted text -
How does a carburator cause his problem?
 
H

Hank

-------------------------------------

I have a 3 year old kholer courage 20hp engine in a Husqvarna lawn tractor.
Today, the engine started to push oil out of the crank case breather tube
which is right above the carb causing it to stall. I took the air cleaner
off and started the engine and the oil coming out of the breather tube
went as far as 2 feet from the engine. It is fresh oil and a new oil
filter. The oil is clean (not black). Any ideas on what I should try to
fix this problem?
Was the mower tipped on its side or back end or rolled over? This
question has be asked. But it isn't a carb problem and Sea Foam won't
fix it. :)

Hank
 
J

jamesgangnc

On 7/12/2011 12:03 PM, jamesgangnc wrote:> On Jul 11, 7:53 pm, (e-mail address removed) wrote:

...


As he stated above...

--
The op claimed he checked the oil level. When the oil gets filled
with gas from a stuck float the oil level is high on the stick. So
try again, how does a bad carb cause this problem?
 
D

dpb

The op claimed he checked the oil level. When the oil gets filled
with gas from a stuck float the oil level is high on the stick. So
try again, how does a bad carb cause this problem?
Well, OP _could_ have filled it correctly and not actually measured again...

It is a plausible hypothesis worth OP knowing of just in case..

--
 
M

M.A. Stewart

dpb said:
Well, OP _could_ have filled it correctly and not actually measured again...

It is a plausible hypothesis worth OP knowing of just in case..

From a Briggs & Stratton Service and Repair manual re 'Breathers';

"It is the breather's function to maintain a vacuum in the crankcase.
The breather has a fibre disc valve, which limits the direction of air
flow caused by the piston moving back and forth. Air can flow out
of the crankcase, but the one way valve blocks the return flow, thus
maintaining a vacuum in the crankcase.

A partial vacuum must be maintained in the crankcase to prevent
oil from being forced out of the engine, at the piston rings, oil seals,
breaker point plunger and gaskets."

Aside from an overfilled crankcase on this Kohler, is the breather
system working properly?
 
J

jamesgangnc

From a Briggs & Stratton Service and Repair manual re 'Breathers';

"It is the breather's function to maintain a vacuum in the crankcase.
The breather has a fibre disc valve, which limits the direction of air
flow caused by the piston moving back and forth. Air can flow out
of the crankcase, but the one way valve blocks the return flow, thus
maintaining a vacuum in the crankcase.

A partial vacuum must be maintained in the crankcase to prevent
oil from being forced out of the engine, at the piston rings, oil seals,
breaker point plunger and gaskets."

Aside from an overfilled crankcase on this Kohler, is the breather
system working properly?- Hide quoted text -

- Show quoted text -
That's about the same as a pcv valve on a car. Not all small 4
strokes have those. Some simply have a small breather tube connected
to the same air supply as the carb to prevent dirt from beng sucked
in. Usually with some sort of metal baffle to trap oil. If this
kohler has something like a pvc valve and it's clogged that could be
the problem.
 
C

clare

I'm not familiar with that particular engine, but it triggered a memory
from the vintage car world - did this happen before the new filter was
put in? Is there any chance that the filter's faulty, the wrong type, not
seated correctly etc. and so oil is bypassing it? That could account for
a large increase in pressure.

cheers

Jules
Nope - no possible increase in pressure from the filter - and that
would NOT blow oil out the breather. Oil pressure is contained in the
galleries and bearings and has NO effect on the crankcase, so will not
blow oil out the vents.
 
C

clare

How does a carburator cause his problem?
Very simple. I just replaced a carb to solve this EXACT problem on a
6 year old Tecumseh a couple weeks ago. The carb float would not shut
off the fuel, so all the fuel in the tank flowed through the carb,
into the cyl, past the rings, and into the crankcase. First time the
piston went DOWN, it pushed oil out the breather into the intake.

A new needle and seat was installed, and a week later it happened
again, so I replaced the carb with another one I had floating around
off an engine that I had scrapped due to damage.

No problems since - and the inside of the engine is spotlessly clean
after two good soakings in gasoline!!!
 
C

clare

Was the mower tipped on its side or back end or rolled over? This
question has be asked. But it isn't a carb problem and Sea Foam won't
fix it. :)

Hank
Don't bet your pension on it - on either count.
As I just posted - I just had one a couple weeks ago - and it wasn't
the first one.

I've had quite a few on older cars, tractors, and farm equipment as
well over the last 40+ years.
 
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C

clare

The op claimed he checked the oil level. When the oil gets filled
with gas from a stuck float the oil level is high on the stick. So
try again, how does a bad carb cause this problem?
He "checked the oil" - but was his check accurate - and what level
did he find??

An extra inch of oil will cause problems on MOST small engines.
 

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