I have a Ryobi 6.5 HP (Briggs & Stratton) lawnmower. It starts and runs fine until the prime runs out, then it dies. If I contnue to pump the primer bulb it will continue to run. It is hard to mow and pump the primer bulb at the same time. Any thoughts? Thanks, Dave.

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Lawn Mower Repair pt.1: starts & dies, Tecumseh/Craftsman ...

? 2:10
https://www.youtube.com/watch?v=IVYYYpAviPA
Mar 7, 2011 - Uploaded by Alameda Repair Shop
Spray with starting fluid and the engine runs a bit longer but dies.... I especially like how you use the gas can to hold up the mower, Classic :) ... After I started it up, it would only stay running for a few seconds before dying. .... LAWNMOWER REPAIR: briggsand stratton pulsa prime carb overhaul - Duration: ...

How to fix a gas lawnmower that starts then dies - YouTube

? 7:37
https://www.youtube.com/watch?v=caa0WrpxqyU
May 3, 2011 - Uploaded by SmallEngineRepairGuy
This is a how to video on what to do if your gas mower starts up then dies after a ... I have a different lawnmower and not very mechanical but this got my ... Got the job done and now i can do a thorough cleanout of it when i run it dry of gas. .... How to FixBriggs & Stratton Small Engine that Only Runs Off the ...

Craftsman 5.3hp starts but won't stay running... - DoItYourself ...

First check the air filter isn't blocked. If it isn't the carb is at fault.

blow air back threw the line towards the tank you have something clogging it or you forgot to turn the fuel on

Are you leaving the chock on? Might be starving for air.

this is from a post i just did for anothe engine but i think it applies to you also.

get a product called START. this stuff is amazing it has solved all my engine problems including a couple like yours. any wal mart should have it. add to your gas and the longer it runs the better it runs. i am telling you it is worth the 6 bucks. i had a 4wheeler that never ran right, always had to half choke it. even though i cleaned the carb twice. added this stuff and by the time that tank was gone it was running like new. if that doesnt take care of your problem then it needs to go to the shop Now your situation i know is dirt or varnish in the carb i have had this problem also. and start worked for me on that also. mix it in the gas and keep it running even if you have to keep priming it

Try replacing the float and needle. The float (floats) and pulls the needle up to let gas through to the carb. It will stay running as long as you press the prime bulb because this sends gas straight to the carb without going through the gas bowl. It's best to remove the carb and clean it then replace the float and needle

Be sure the fuel is fresh....meaning, fresh from the gas station. IF that doesn't fix it, replace the carb.

IF IT IS A BRIGG & STRATTON ENGINE YOU CAN GO ONLINE TO BRIGGS & STRATTON.COM AND ASK THEIR TECH SECTION ABOUT THE PROBLEM. FOR 3 MONTHS OLD SOUNDS LIKE DIRT OR WATER MAY HAVE GOTTEN INTO THE TANK. WHEN YOU PRIME THE MOWER YOU ARE FORCING GAS INTO THE CARB AND ENGINE AFTER THAT THE ENGINE SHOULD PULL THE GAS IN THE ENGINE, I WOULD SAY THE CARB MITE NEED REBUILDING BUT NOT AT 3 MONTHS

First thing u might want to check is the governor--Make sure the spring and linkage is hooked up properly and the governor is moving freely.