[Fot] Most carburetor problems are electrical in nature (mostly off topic)

[Vince G]

That is so damn funny.  LMAO. thanks I needed that!  My street GT6 has bumbled
and popped to a complete stall at the side of the road 3 times this week,
twice today an I've tried the obvious, found what looked to be the problem.
When I replaced the fuel filter I noticed the intake fitting on the mechanical
pump was very loose so tightened it down and smiled.  Seemed better briefly
then engine miss-fire continued sporadically then quit again completely100
miles later.

 Back to the garage for some late night fun I guess.  At least it brought me
home.

Sent from my iPhone

On 2012-07-07, at 9:54 PM, "Bob Bownes -Seiri" <bownes at seiri.com> wrote:

> Carburetor is French for "leave it alone"!
>
>
>
> On Jul 7, 2012, at 20:56, Brad Kahler <bkahler1 at gmail.com> wrote:
>
>> The old adage: "Most carburetor problems are electrical in nature"
>>
>> 1)   Zero turn mower stopped running because we thought it was out of gas
>> 2)   Filled the tank and it wouldn't start
>> 3)   Battery runs down from cranking without starting
>> 4)   Used truck with jumper cables to try and start with no success
>> 5)   Towed mower back to shop (ever try to tow a hydraulic powered
>> zero turn mower when it isn't running?  Hint, it's not easy!)
>> 6)   Pulled spark plug and verified there was spark, that means its fuel
> related
>> 7)   Pulled fuel line from carburetor and verified flow coming from
>> fuel pump - there was
>> 8)   As a test used different electric pump feeding from gas can and
>> still no start
>> 9)   Replaced fuel filter just for the heck of it.
>> 10) Pulled radiator and fan assemblies to get access to carburetor for
>> removal and rebuild
>> 11) Rebuilt carburetor and also verified fuel shutoff solenoid was
>> functional and re-installed
>> 12) Replaced alternator coil under flywheel while radiator and fan
>> were out of the way
>> 13) Reassembled everything
>> 14) Still doesn't want to start
>> 15) Re-verified that electric fuel pump is pumping fuel - it was
>> 16) As a test I again used a different electric pump feeding from gas
>> can and still no start
>> 17) Decided there must be something wrong with fuel shutoff solenoid
>> 18) Pulled radiator and fan assemblies to get access to fuel shutoff
> solenoid
>> 19) Found only 1.4 vdc at solenoid - figured this was the problem
>> 20) Tracing wire back and found that it comes out of the voltage regulator
>> 21) Assumed voltage regulator was bad and prepared to order replacement
>> 22) Before ordering I had a hunch.
>>
>> My hunch was to check out all of the wiring.  I found the connector
>> between the motor and the mower harness was deteriorating and
>> crumbling.  This allowed the wire going to the fuel shutoff solenoid
>> to slip out of its socket and was only barely making contact which
>> accounted for the 1.4 vdc.  The wire that fed the ignition coil in
>> that same plastic connector was still making contact which is why the
>> spark plugs had spark.  All of the symptoms pointed to a fuel flow
>> problem and when you get down to the root cause there was no fuel
>> flow, unfortunately it was because of an electrical problem.
>>
>> When it was all said and done, the mower had not run out of gas and
>> the carburetor didn't need to be rebuilt.  I did need to replace the
>> alternator coil under the flywheel so at some point I was going to
>> have to pull the radiator and fan assemblies to do that so not all was
>> lost.
>>
>> So getting back to the very first sentence.  The old adage "Most
>> carburetor problems are electrical in nature" appears to have merit.
>>
>> I hope your Saturday went better than mind did :)
>>
>> Brad
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