[AT] Kohler engine update - still having trouble

Mike meulenms at gmx.com
Tue Jul 28 16:59:19 PDT 2015


Ok, so I started the engine, and pulled the line off the fuel pump that 
leads to the crankcase, no fuel leaking through at all, just suction. 
Shouldn't it be leaking fuel through that hose if the diaphragm is ruptured?

Thanks,
Mike

On 7/28/2015 7:31 PM, Steve Offiler wrote:
> Yup.  I've had two or three different Briggs with this problem.  It explains the raw fuel in the crankcase - fuel pump is a pulse-type and torn diaphragm opens fuel tank straight to crankcase.
>
> SO
>
> Sent from my iPhone
>
>> On Jul 28, 2015, at 6:52 PM, <rlgoss at twc.com> wrote:
>>
>> Blown diaphragm in the fuel pump.  It sets on top of one of the rocker arms.
>>
>>
>> Larry
>> --- Mike <meulenms at gmx.com> wrote:
>>> Several days ago, while mowing with my Simplicity Sovereign, Kohler
>>> CH18S) I completely blew out the front oil seal. Today, I replaced the
>>> seal, cleaned the carb, and put the crankcase vent tube back where it
>>> belongs. I figured since the tube had been exposed that I would change
>>> the oil and filter as well. When I drained the oil, I noticed it was
>>> very thin,  so I stuck a finger in the stream, and sure enough it was
>>> raw fuel. I put everything back together,and it started right up. I made
>>> two passes around the yard, and it was smoking so I check and it was
>>> already pushing oil past the seal. For some reason I am creating too
>>> much crankcase pressure. I pulled the crankcase vent tube and check for
>>> any obstructions, I found none. Any ideas what to check for? If I keep
>>> running it, it will just blow another seal. Thanks in advance.
>>>
>>> Mike M
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