Question about Parks Optical 13.5hp Briggs And Stratton Intek Lawn Mower Engine

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I own a Sears 42 inch B&S 18.5 31P777 engine

I own a Sears 42 inch cut with a B&S 18.5 31P777 engine that suddenly quit after two rounds around my acre yard. It died and I was able to start it once and then the thing only barely ran and blue somewhat black smoke came out of exhaust and oily gas blew out of round gizmo where the fuel comes from the tank. Also a rubber hose came loose spraying fuel from carb. Do you have any Ideas on this one? I would appreciate any help you can give
Ed from Oklahome

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Hi I have a sears tractor with a briggs engine 24hp, the motor has been running well, but know it is bending ext. push rods, hard time to set the valve , could the problem be with the tappet-valve????
thanks jeff from ottawa,ca jeffkeyuk@live.ca

Posted on Jul 15, 2009

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Okay, here's the main problem. The engine itself (literally the engine with a bare crankshaft) is produced by Briggs. 99.9% of the time, everything else is supplied by the equipment manufacturer, although a couple get specific enough to have Briggs equip the tank. Not many, and they are few are far between. So you're dealing with the carb (Briggs) and more than likely, the fuel tank and lines supplied by Craftsman (I assume that's the make since it's a Sears).

It sounds like fuel has gotten into the engine, thus the black smoke. Not sure why in the world that would cause the lines to come off. Check your oil first and see if there is gas in it. You might need to replace the fuel lines, check your owners manual for the rider and see if they have a parts list in the back, anything they did not supply will say something like "see engine manufacturer". If the hoses are there, you can get them from them. But the carb may also need cleaned out or, possibly, rebuilt. Rebuild kits are generally pretty cheap and available directly from Briggs with the Model, Type and Code numbers from their site.

Hit me up if you need any more info.

Posted on May 14, 2009

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