wt-257 carb pop-off pressure

przemeku6 created the topic: wt-257 carb pop-off pressure

Hi everybody, what is the proper pop off and re-seat pressure for 257 carbs?????
thanks for your help!!!!
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dazzido replied the topic: Re: wt-257 carb pop-off pressure

When i hear about carb pop off pressure what exactly is it and what is the purpose?
cheers Darren
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przemeku6 replied the topic: Re: wt-257 carb pop-off pressure

it is a pressure that will pop open a metering inlet needle.
here is a walbro carburetors service manual, very helpful with understanding how those carbs working.

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File Name: ServiceManual.pdf
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Scott replied the topic: Re: wt-257 carb pop-off pressure

Below a copy/paste of a post made on JRCBD on said subject. Tried to get a tad deeper in laymens terms on the bigger picture of whats going on.


2 stroke Engine Tech of 30+ years, Prop tweeker, Chronic tinkerholic, Home of Motor Heads RC Racing Engines ...
8 time NAMBA National 6 lap heat racing record holder.
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