Erratic idle or no idle is often traced to a bad internal needle valve, bad float diaphragm, bad pump, and most common… crap in the carb. You may also have an air leak! The pop-off pressure is out of the normal range. About 12 PSI is normal. Pop off pressure is how much pressure is required to pop the main-jet needle off of its seat.
The fuel pump pushes fuel against a spring. Either having the wrong spring, a cut spring or stretched spring can affect this pressure. Your email address will not be published. Walbro Diaphragm Carburetors. Walbro Repair Kit Interchange April Walbro Service Manual. Last edited: Feb 6, Cut4fun , Feb 6, We're lucky to have this. Mastermind , Feb 6, Couple more things. SE 1 , pavel , 00wyk and 8 others like this.
Walbro Price List. If you find a part or carb that you need in the other docs referring to the price list might tell you if it is still available. Joe Saw , 00wyk , Rob Stafari and 3 others like this.
Good stuff. Thanks for putting it all together in one place. PogoInTheWoods , Feb 6, Now all we need is for Dave to start stocking all the individual parts so we don't hafta buy a whole kit just for a metering diaphragm. And then he could even mail em in 55 cent envelopes! This all-new, 21 minute video demonstrates the proper techniques for servicing Walbro butterfly valve and rotary valve diaphragm carburetors.
The video will be of value to dealers, service technicians and technically-oriented consumers. More Info. Impulse Pumps. Click Here for Parts Lookup. Featured Products.
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