Briggs& Stratton surges then quits....


Old 10-06-01, 02:25 PM
Ken S.
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The 10Hp Brigg&Stratton on my Simplicity 3110E riding mower begins to surge than dies after cutting for 20 minutes (plenty of gas in gas tank). I discovered that the clear plastic inline fuel filter appeared empty. I assumed it was clogged so I replaced it (arrow toward carb.side) with an identical filter. After replacement the new fuel filter was 2/3 full of gas and I figured problem solved. Now I am experiencing the EXACT same problem with the exact same symptoms. Starts fine , cuts for 20 minutes, surges than dies, and what appears to be no gas in the new filter. First of all how much gas should be in the filter at any given time? The clear plastic filter is shaped like a shot glass with a conical paper element inside it. Does it matter what filter you use? Is it vapor lock? What do you suggest?
Ken S.
West Dundee, Illinois

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Old 10-06-01, 02:56 PM
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Restricted Fuel Supply

Hi: Ken

Chances are the fuel flow out of the fuel tank is restricted. This may be caused by a defective fuel tank cap. Try running the engine without the cap installed.

Another method is remove the fuel hose and allow the fuel to run out into a container. Do this with the fuel cap ON.

The fuel should continue to run out of the fuel hose until the tank is totally empty. If the fuel volume decreases in flow or stops, remove the cap and notice if the flow resumes.

Check the archives, within this forum, for more information.
Several other postings and replies to this topic with helpful information can be found there. Check the manufacturers online web site for additional help.

Regards and Good Luck,
The Forum Moderator
Accurate Power Equipment Company
Small Engine Service and Repair Technician.
Old 10-09-01, 03:10 PM
Ken S.
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Thank you for the advice. Running without the gas cap really did not improve fuel flow. So, I removed/flushed the fuel tank, replaced fuel line and installed a B&S OEM fuel filter. I have my fingers crossed.
Ken S.
Old 10-09-01, 03:24 PM
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Hello Ken

Thanks for posting the updated info. Do so again when you complete the task and retest the engine results. Just locate this orginal posting and click reply. That will keep the topic alive and bring it to the top of the list once again.

If the engine continues to have the same symptoms, when it dies out, remove the spark plug, reconnect the plug wire, lay the plug on the engine and crank the engine. You should see a blue spark across the plug electrode.

If the plug doesn't fire at that time, the problem may be within the spark ignition system. Post back the type of ignition system used on that machine.

Good Luck,

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