Briggs & Stratton
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The only timing is the key on the flywheel to crankshaft i set the valves to .006 turn the engine till one of the rocker arms opens a valve then set the other one then do the same to the other valve those engines are known for valve seats falling out let me know if that’s the case i can guide you to that repair
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Clearances differ for the two valves and typically range from . 002 – . 004″ to . 005 – .
Use a ring spanner to loosen the locknut and turn the screw clockwise to decrease the gap, and the opposite way to increase it. When the clearance is correct, hold the screw with a screwdriver while you tighten the locknut, then re-check the clearance. There may be a self-locking adjusting screw with no locknut.
If your engine generates a loud clatter, it could be time for a valve clearance adjustment, though a tapping noise could also be caused by a loose rocker arm or some other component; the mechanic won`t know for sure without inspecting the valves.
A general rule of thumb is that intake guides need guide-to-stem clearance of . 001″ to . 003″ and exhaust guides need from .
The inlet valve remains in the closed position. The exhaust valve opens, the piston moves from BDC to TDC due to the energy stored in the flywheel. The burnt gases inside the cylinder go out through the exhaust valves. At the end of the stroke, the exhaust valve closes.
The opening of the inlet valve before top dead center on the exhaust stroke and the closing of the outlet valve after top dead center on the induction stroke result in a period during which both valves are partially or fully open.
Check the clearance between the top rocker arm and the corresponding valve stem, located in the center of the valve spring, using a feeler gauge. If the clearance reading falls outside of the acceptable range of . 005- and . 007-inch, the top exhaust valve is out of adjustment.
Check – Slip the gauge blade between the rocker arm and valve tip. Move the gauge forward and back and feel the resistance. If you feel a nice amount of resistance, meaning, the gauge is snug but does move when you push on it – Your good, no need to adjust this valve. If you don`t feel any resistance, start adjusting.
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Wshat is the valve clearence for a 24 hp briggs and stratton engine model 446677 type 0470E1 code 050405yh
About a mm or .004″.
Won’t crank over seems like to much compression ?
OHV? First try adjusting the valves too much clearance will the decompressor to not work. Now the decompressor can also fail but try the valve adjustment first.
17 HP Briggs & Str lawn mower engine that is smoking a lot –
Compression test it can either rent or buy one should be over 90psi!!!
Hard hitting on compression stroke when starting
If its the 21 or 20 hp OHV single briggs. Adjust vales to .004. The cam also has a decompression that breaks, Causing hard start. So if valves are adjusted and u still have problem. “Could” be cam, remove bottom cover and inspect cam. new cam about 75 to 100 bucks.
How do I remove and clean air filter? – Briggs & Stratton Lawn-Boy 10640 20-Inch 6.5 HP Gas Powered Lawn Mower
There should be a square of plastic on the side of the engine which is opposite of the muffler. It has a small hex head with a slot cut in it. Remove this plastic cover and the air cleaner should be inside of it.
I have a 12.5 Briggs & Stratton and I can not get the timing marks on the crankshaft and cam gear to line up when the piston is at top dead center.
Timing on briggs is piston past tdc by 6mm….also see if you are 360deg out?
Oil quanity I have 20 hp craftsman briggs and stratton twin how much oil when you change out oil
2010 model 20 hp Briggs motor. Fuel going through fuel line, but not going into carberator. Motor runs good for about 15 min, but after heating up this fuel problem starts. After cooling down for an hour it will run again for about 15 min.\r\nThanks for any advice
Tom in AR
1 Is fuel coming out of the fuel line. Older mowers have old fuel lines and they tend to get weak and collapse went they warm up with engine heat. Replace the old fuel line.
2 deposits in the carb. take off the air cleaner, start it up and spray a good carb cleaner in the carb until the engine dies. Put some ‘seafoam’ in the gas and a little in the oil and put the air cleaner back on and start the mower and mow on FULL THROTTLE. this should claen out the carb. Yes the mower will run rough for awhile.
these two cheap fixes will solve 85 % of carb problems. GOOD LUCK