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B&S Sprint 375 won't prime

paulhurleyuk's Avatar

Join Date: Aug 2011
Posts: 1

08-05-11, 10:23 AM   #1  
B&S Sprint 375 won't prime


I have a Briggs and Stratton Sprint 375 (Model 96902 0106-01 93010905) that has run for many years but recently has stopped priming.

When I press the prime bulb in no fuel is squirted, and the prime bulb doesn't fill with fuel when released. I replaced the prime bulb a year ago when it perished, so the bulb itself seems fine. I assume a check valve somewhere is stuck open or closed.

Any one know which valve it might be, or other things to try ?

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marbobj's Avatar

Join Date: May 2006
Posts: 3,658

08-05-11, 04:42 PM   #2  
The check valve is likely in the bulb itself. You may have a pinhole in a fuel line on the intake side of the bulb.

It's pretty easy to figure which side is the intake. Remove that line back at the source, put your finger over the end of the line and depress the bulb. If it stays depressed the line is OK and there is blockage to the fuel feed to the line. If the bulb returns to its normal shape, there is a hole in the line or the bulb is bad.

aj-allen's Avatar

Join Date: Nov 2005
Posts: 467

08-05-11, 05:47 PM   #3  
The check valve is behind the primer you need to push in on both side of the retainer to remove the primer. Briggs has a tool to do this with out breaking the plastic carb.


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