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What will cause compression lock up on a Briggs and stratton lawnmower only when spark plug is in?
Probably has something to do with the compression release or valve adj. Look at troubleshooting in the manual. You did not say if your lawnmower is gas or electric. Problem (not starting) could mean the spark plug is fouled, improperly gapped, or damaged. Does it crank but the engine never catches? You didn't say Is there an electric starter? Outlet might not be live - battery could be weak or dead or there could be bad connection or bad starter motor.
What else can I help you with?
What would cause a 16HP Briggs and Stratton motor not to turn over at all?
Maybe no juice in the battery.
Why does your Briggs and Stratton L head twin spit gas out of the carburetor and flood out at starting?
A Briggs and Stratton L head twin engine wills pit gas out of the carburetor and flood out when starting if the diaphragm has been damaged. This will cause excessive fuel to enter the carburetor.
Why does your 5hp ohv Briggs and stratton turn very hard on compression stroke?
Because both valves (or reeds in the case of some 2 stroke motors) in the cylinder head are closed and it is compressing the air and fuel i so the mixture will ignite and cause combustion or firing of the mixture to create power to cycle the motor through the exhaust and into the next compression stroke.
Help getting gas in oil and muffler on Briggs and stratton 12.5 ridding lawnmower?
Two things can cause this problem. 1. Bad or worn rings. Do a compression test on your cylinders to find out if the pressure holds your good to go. 2. float in your carb is stuck open or gum/ varnish in the needle. This is the most likely cause for gas in the muffler system, and the oil. fuel will seep down the cylinder walls due to flooding of the carbs fuel jetting system. A carb rebuild (with a new float if needed) will take care of that problem for about 40 dollars.
What will cause a Sears craftsman riding mower with a 20 HP Briggs and Stratton motor not prime?
loose line,[sucking air] hole in primer button, no gas,
Why is engine surging on a Briggs stratton 3 and a half hp engine with a primer bulb on a push mower?
Most common cause of surging is a dirty/clogged air filter.
What causes a Briggs and stratton engine idle speed go up and down?
The most common cause of engine surging (rev up and down) is a dirty air filter.
What is wrong with your Briggs and Stratton engine that just keeps revving up and down?
The most comon cause of an engine that keeps revving up and down (aka surging) is a dirty air filter.
What can cause a 17 HP Briggs and Stratton to run only with choke fully closed?
There is restriction of fuel flow somewhere. Look for a clogged fuel filter, a pinched fuel line, or debris in the fuel tank. Otherwise, the carburetor needs to be re-set.
Why is my 21 horsepower Briggs and stratton engine in my Husqavarna riding lawnmower running rough with black smoke and gasoline being sucked up into air filter housing?
Black smoke means it's getting too much gas. Gas at the air filter also means that it's getting too much gas. The most likely cause it that the float valve is either sticking or has something stuck in it letting gas continually seep by it. Sounds like a good carb cleaning is in order.....
What can cause a compression fracture?
Compression fractures can be caused by osteoporosis, trauma inflicted on the back, and tumors that have started in the bone. Tumors that occur in the spine also cause compression fractures.
What causes surging on 5hp Briggs and Stratton lawn mower?
The most common cause of surging is a dirty air filter. EPA approved carbs tend to run lean causing the surge condition described. Main jet needs to be replaced with next size larger.
