B&S 6.75 self propelled z-start mower


Old 03-07-06, 12:05 PM
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Join Date: Mar 2006
Posts: 1
B&S 6.75 self propelled z-start mower


When I tried to start my mower up for the first time this season it started slow but eventually warmed up. Then I mulched a bunch of leaves and now it is really struggling. It has new gas and oil. And I changed the air filter, which was dirty. No smoke, it just won't stay started. Any advice?

Thanks in advance.
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Old 03-07-06, 12:11 PM
Join Date: Dec 2005
Location: South Florida
Posts: 515
does it have a fuel filter? if so, change it out. Also drain the carburetor float bowl if possible.
Old 03-07-06, 09:02 PM
v8driver's Avatar
Join Date: Sep 2005
Posts: 767
Quantum? its more then likely got a wire mesh screen in the tank, right where the fuel line connects to at the tank, but in the tank. Shot of carb cleaner from the fuel line nipple or a slosh out of gas to remove anything should clear it, though the tank will have to come off to slosh it out good. But it could also have trash in the carb, also make sure the air filter box is tight to the carb.
Old 03-08-06, 02:59 AM
puey61's Avatar
Join Date: Apr 2004
Location: Upstate New York
Posts: 3,224
Being a 6.5 horse, this should be an overhead valve Intek series engine. Make sure the spark plug (Champion RC12YC) is gapped at .020". This is critical for good performance. If that doesn't solve the problem, it's time to remove the carburetor and soak & recondition it.
Old 03-08-06, 11:09 AM
v8driver's Avatar
Join Date: Sep 2005
Posts: 767
Keep in mind, briggs offers a quantum from 5.5hp, to 6.75, this is of course a 6.75, though it should have a cover on it saying ohv.

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