Question about Briggs & Stratton Briggs Stratton Intek V - Twin Vertical Ohv Engine with Electric Start 22 Hp, 1" X 3 5/32" Shaft, ModelNo. 44K777 - 0027 - E1

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21 hp B&S twin-v ohv , engine loading up when blades are engaged

Engine starts great, run good even when blades are engaged,but cutting grass. When cutting grass the engine starts to blog down and engine starts to skip. Have set valves, new plugs, and cleaned the carb.

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Sounds like the blades are dull. HAve them sharpened

Posted on Apr 21, 2009


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Briggs& Stratton 18hp OHV Intek engine will run only under a load.

Your PTO safety switch is opening intermittently. Would help if you would always add your model # such as 917.100000 that way I could look up on Sears site and tell you approx. Location of switch.

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Runs fine when blades not engaged, engaging blades causes engine speed to be reduced. Engine speed increases to normal when blades not engaged, or when motor not moving. Sounds as if mowing through very...

If it has a B&S engine, and many do, try this. Remove one spark plug at a time and start the engine. If it runs with one plug, but not the other, then you have a dead cylinder. That is why it seems to run OK so long as no load is on it.

I have had 2 different mowers with B&S engines which bent the valve push rods on the left (as the driver sits) side of the engine causing the problem you speak of. And if you google this issue you will find that I am not the only person who ever had this scenario.

If you have the OHV type engine you can pull off the little valve cover, next to the spark plug, and see the rocker arms and the push rods behind them. Replacing them is about as easy as it looks, however setting the gap between the top of the valve and the rocker is best left to someone who knows what they are doing.

Sep 10, 2011 | Craftsman 21 Hp 42" Deck, Ys 4500 Lawn...

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I have a craftsman mower with the B&S 21hp Intek OHV motor, it starts fine but when you go to engage the blade or go forward or backward or release the parking brake it will die unless you disengage...

Check the switch on the seat, of all places. There's a safety switch on the seat that will kill the engine if it's not engaged when do anything other than start and run the engine.

If the switch checks out, get back with me.

Jul 06, 2011 | Briggs & Stratton Briggs Stratton Intek V...

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Boggs down when you hit grass a little high like its running out of gas 20hp on arens zero turn changed gas filter no help the gas filter does not show gas in it when running

This is usually indicative of strain on the motor, moreso than a lack of fuel. You may want to check and see if the blades are obstructed or the discharge chute may be blocked. Wet grass is a common culprit in this and can really labor the blades, as well as cake the deck making it difficult for the blades to not only turn and cut, but to discharge the clippings as well. As long as you have the 3 primary elements of combustion (air, fuel, fire), this is most likely going to be the cause of your problem.

Jul 30, 2010 | Briggs & Stratton Briggs Stratton Intek V...

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