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Briggs & Stratton sp470 engine spluttering - Briggs & Stratton Garden

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: briggs/stratton XM 6.75 hp quantam engine cv2300-OMBC

I have a brigg & Strat, works great but the oil keeps turning black, and it leaks throught he air cleaner. It is approx 1 yr old, bought it used but it looks new

Posted on Oct 20, 2008

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SOURCE: removal of flywheel from briggs and stratton 4 cycle engine 3 hp

Without the $100 flywheel remover that briggs will happily sell you you can do the following.
First you will need another body to help, two if available
2 pry bars or large screwdrivers
A air hammer if you have it or a large hammer if not
Loosen the flywheel nut until it backed off til the nut is just barely one thread or even with the shaft. Now put your pry bars behind the flywheel on opposite sides. Have someone provide constant pressure (don't be too forceful the block is made of aluminum and can be damaged). Now hit the end of the shaft with a hammer or air hammer (the nut is protecting the shaft threads) with medium power. With a few careful hits the flywheel should pop right off.

If you run into trouble or are unsure of something in this proceedure please ask.

Posted on Mar 30, 2009

extroitive
  • 35 Answers

SOURCE: briggs & stratton 3 hp engine will not start

likely needs a carb kit

Posted on Apr 19, 2009

  • 376 Answers

SOURCE: Stratton Briggs Stratton Intek V - Twin Engine 21

The oil is contaminated with water. Change oil and filter, if it has one.

Posted on Jun 14, 2009

  • 17 Answers

SOURCE: craftsman 19.5 lawn tractor w/briggs & stratton keeps flooding

This could be a number or items from no spark to a faulty carburetor, a plugged up air filter, valves out of adjustment, poor gas, faulty spark plug.

First, see if your getting spark, how about taking the wire off a plug(s) and holding it about 1/8" or so away from the plug with some masking tape while you crank the engine. You should be able to see the spark jumping the gap, it helps if it is not too light outside. If you attempt to do this with your hands, you will get a spark jolt, it hurts, so use the tape and remember, the engine could start so proceed with caution.
If you have no spark there, then you ignition or magneto is faulty. This would be unlikely in the broader scope of things. You will likely get spark. Make sure the plug is clean, take it out and inspect. If it is covered in gunk well clean it. It will smell like raw gas but you already know that. Change the plug if in doubt.

Remove and clean and replace the air filter.

If you have spark, and a clean filter it is likely a carburetor problem, Depending on the carb, it could be the choke is faulty or, as per the below.

Depending on what model you have there is a float assembly in the carburetor that stops the fuel from flooding the carb and air intake. The gas tank is higher then the carb right, so if you dont have a mechanism for stopping the fuel from leaking out the hole that goes into the engine, it will all leak out right, as into the fresh air intake because its easier than going into the engine. So, there is a miniature float assembly, sort of like your bathroom toilet float to stop the water. Well there is a small wedge type needle that seats into a hole and it is attached to a float. As the gas rises in the bowl, it pushes up the float, sealing the gas into a chamber, as you use more gas, the float lowers and more gas goes in. So ,there is dirt jammed into the float bowl sealing needle, just a little, thats all it takes. So, shut off the gas somehow, hopefully you have a valve, or squeeze the rubber line, then undo the float chamber, its one nut on the bottom. Clean carefully. The needle, little spring and float assembly are delicate. Also, the needle could be worn from engine vibration, so it may need a new needle. It would help if you described the engine and carb though.

I posted that as a solution to another problem, but yours may also be the valves need adjusting. Depending on the amount of hours, say over 200, then the valves timing will likely be off a bit. Check the clearances with a feeler gauge, it is not as difficult as it seems. Check your Owners manual for the clearance at top dead center. TDC is when you take the plug out and watch the piston arrive at the top of the cylinder through the spark plug hole when you are turning the engine over (do this by hand, battery off. Make the adjustments with the valve cover off. Follow the instructions.

Hope some of this helps.

Posted on Sep 21, 2009

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I have a mountfield sp470 petrol self proppelled lawn mower. the engine is briggs& stratton but i dont know the engine model. i need this as the cylinder head gasket has gone and needs replacing.


Hi. The SP470 has a 4 HP Briggs and Stratton engine.

The part number should be 687171 and you can look here:

http://www.worldofmowers.ltd.uk/Products/ProductList.aspx?search=Head+gasket+&type=3&searchBtton.x=20&searchBtton.y=10

Take a good look at the valve end of the head gasket. From the pictures on the page you should be able to see which one of the 4 head gaskets on the page is yours.

If you have yellow pages you can look up lawn mower repair. Or small engine repair shops. All of them should have this commonly used headgasket in stock. Just find one close to you or.. use the link above.

Here is yet another link for the head gaskets but you have to scroll way way down the page or page search for 698717 or 272171.
http://www.briggsbits.co.uk/acatalog/Horizontal_crankshaft_2-7_HP_Sidevalve_Engines.html

Thanks for choosing FixYa.

Kelly

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If this mower is running a vacu jet style carb with a diaphragm you simply take off the air cleaner, the vent tube, and then the four screws holding the carb on the gas tank and after the carb body can be lifted remove the throttle linkage so you can flip over the carb and pull the main jet and clean the inlet screens.
http://www.psep.biz/store/briggs_stratton_carburetor_kits.htm

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