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Posted by trainfan1 on May 5, 2007, 10:58 pm
dpb wrote:
>> brian wrote:
>>
>> > I have a Craftsman DYT 4000 tractor with a 21 HP Briggs V-Twin. There
>> > is some kind of a problem with the engine. When the engine is running
>> > with blades off it sputters and backfires. When blades are on it runs
>> > smooth. I have replaced air filter, fuel lines, fuel filter, plugs
>> > and cleaned out the Carb. There is no sign of water in the fuel.
>> > Also there are times it will bout die when coming off a hill, then
>> > blow a puff of black smoke. Could it be the fuel pump is going bad?
>> > Any help is sure welcome.
>> >
>> > Thanks in Advance
>> >
>>
>> dpb wrote:
>>>> I have a Craftsman DYT 4000 tractor with a 21 HP Briggs V-Twin. There
>>>> is some kind of a problem with the engine. When the engine is running
>>>> with blades off it sputters and backfires. When blades are on it runs
>>>> smooth. I have replaced air filter, fuel lines, fuel filter, plugs
>>>> and cleaned out the Carb. There is no sign of water in the fuel.
>>>> Also there are times it will bout die when coming off a hill, then
>>>> blow a puff of black smoke. Could it be the fuel pump is going bad?
>>>> Any help is sure welcome.
>
>
>>> Running too rich -- first choice is choke isn't opening fully so it's
>>> running partially choked, therefore a rich mixture. If that's not so,
>>> then there's a carb problem.
>> Or the idle mixture needle is set too rich.
>
> I'd classify that as a carb problem... :)
>
>
I'd classify
"choke isn't opening fully so it's running partially choked"
more of a "carb problem" than a normal idle mixture adjustment, which is
no problem at all, just a normal adjustment to be expected & performed
occasionally.
Rob
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