[AT] Kohler engine update - still having trouble

[rlgoss at twc.com]

The diaphragm is in that round plastic area. It probably is nothing more than a pin hole where the spring rests against it, and may not be detectable.


Larry
---- Mike <meulenms at gmx.com> wrote: 
> 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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