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I have a Briggs & Stratton 13.5 hp OHV on an MTD lawnmower. It suddenly dumped a large amount of gas into the oil and won't start. Is this a carburator problem or wha telse could it be?
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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: ...
? 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 ...
If you had raw gas in the cylinder to where it poured out of the plug hole you most likely have a carburator problem. Inside the carburator is a float and needle, the float pushes the needle into a seat when the bowl is full of gas so no more gas will flow into the bowl or the engine. If the float won't float or the needle is damaged or has dirt between it and the seat the gas will continue to flow into the carburator and on into the engine. If enough gas gets into the cylinder the starter won't be able to turn the motor over. You should also check your oil, usually when gas gets into the cylinder it runs into the crankcase and thins the oil to where it will damage the motor if run for any length of time.
If it is overfilled, milky, or smells like gas. Your going to need to change that ASAP. It sounds like the float has stuck in the past or is still sticking, and it has flooded the crankcase with gas, which has mixed with the oil. And because it is overfilled it comes through the breather hose into the carb. This also explains the smoke most probably because the oil is spewing in the carb through the breather and being burned.
If you have that much gas in your oil it's usually because the float valve in the carburator is stuck open. This allows gas to overfill the carb, it then goes to the cylinder and is thin enough to get by the rings and into the crankcase. It could be because there is something in the valve seat keeping it from closing or the float could be damaged.
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