Question about Briggs & Stratton Briggs Stratton Vanguard V - Twin Vertical Ohv Engine with Electric Start 23 Hp, 1" X 3 5/32" Shaft, ModelNo. 386777 - 0036 - E1

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My 14hp Vanguard mower engine is firing on one cylinder only.Spark plug & compression are O.K..Have you any suggestions that might help?

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Posted on Jan 02, 2017

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  • 5 Answers

SOURCE: vanguard twin 303447 drops a cylinder when hot

there is hose coming from your valve cover to pump. check it for cracks. one of your gaskets at the air filter housing to carb or carb to black block or block to intake maybe leaking. fuel shut off solenoid could be going bad. choke cable adjustment. there is crank case breather under air filter housing with a s shaped hose coming from it to air filter housing make sure it is not loose. i have an engine at work that did =the same thing. i work at a golf course. i am the mechanic. i changed the hose from valve cover to pump and it cured that problem

Posted on Jan 06, 2010

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honeymokey
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SOURCE: carb is getting clogged and spark plugs fouling

Carburetor cleaner will ruin the rings and do that.

Posted on Apr 13, 2010

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Check or replace ignition wire, spark plug spark plug coil. Run a cylinder compression check. Should have same compression on both cylinders. If not, burnt valve, or flat cam lobe.

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Running a Vanguard 23 Hp on my Mud Motor.\r\nQ1: developing a hard starting problem, seems like starting on 1 cylinder, after the first tank of fuel this fall. Fuel filter, spark, and plug OK. Looking at...


It sounds like your valves are out of adjustment. Your starter will bog down if it is out of adjustment and stop at the compression release.
So just take your valve covers off and set your valve lash to
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Have a 78 gs 750, new points, condensors, plugs, plug caps, swapped coils from another gs, and still cylinders 2 &3 are not as hot to the touch as 1&4. Compression checked at acceptable values...


Does the 2 & 3 cylinders have any oil smear on the plugs.? please pull off all the plugs and check the performance. Check the gaps in the plugs. now since you did compression check , I would advice to have the firing of the 2 & 3 plugs with the plug attached checked.
Now correct if the gaps are down or reduce slighly if the intensity is no so good.
now start the engine and remove plug 1 , if it stall , try again with 4, now try with 2 & 3.
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Have 303447 briggs 16 hp only fires one cylinder


Have you also changed the spark plug too. The ignition circuit is pretty simple, from the battery, the Coil is energized, the "points" or equivalent, through the "Distributor" or equivalent, and onto the Spark Plug. So it is a simple matter to work along the path, proving the "Integrity" at each, point by testing. IF it still doesn't fire after ensuring all Leads are OK, the Spark Plugs are proven OK, the Cables, the Points, & Distributor, . IT is either that or the Ignition Timing is OFF. Please check all those points.

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1 Answer

My 1965 ford tractor will not fire on a cylinder. I have replaced starter, spark plugs, plug wires & disrtibutor cap what next ?


Do you have compression in that cylinder?How did the plug look when you removed it?Was it black and oily?Black and sooty?Did it smell of gas?Did you change your points and condenser?By tractor will not fire on a cylinder,do you mean spark?Check for compression on that cylinder first.No compression,remove the valve cover and look for a broken spring or a stuck valve.Both won't allow that cylinder to build compression.Another thing is a burned valve,it won't be able to seal.You can sometimes hear which one that's bad by removing all the spark plugs except on the bad cylinder.Then turn over the engine and listen at the exhaust and carburetor.You'll hear the air going by the valve that's bad.This is allot of info,I know.Try to check the compression and look at those valves if it's not the points.


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1 Answer

Briggs and Stratton Vanguard twin stopping running and wont start


A couple of things you might try...off the shelf from Lowe's or walmart is engine repair in a bottle...I've used it and it works, but read instructions. If that doesn't work, you may have a lacquer build up on carb. Pull the fuel bowl off carefully and check for a clear opening in the fuel pickup as they may be clogged. Remove gas tank and flush it and then make sure it's really dry...replace fuel filter and install two in series in place of one. Also, try to find a gas station that sells ethanol free gas and use it for your small engines. Hope this helps some.

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1 Answer

One cylinder won't fire


You need to check spark plug wire to that cylinder I have had the same problem where a mouse ate insulation off wire ,Your engine has a coil with two wires one runs each cylinder I have had them go bad where only one fired you would need a new coil .

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1 Answer

Will crank but won't fire


To run, the engine needs fuel/air mix, compression, and a spark. See if you can narrow your problem down to one of these. Remove the plug, then connect the plug wire and set (or carefully hold) the base of the plug against the cylinder head. Crank the engine and see if there is a spark. If not, the problem is in the ignition system.
If you see a spark, replace the spark plug. Remove the air filter and pour about a tablespoon of gasoline down the carburetor throat. Crank the engine, being careful to stay away from the carburetor in case it backfires. If the engine fires and runs, then it probably is not getting gas (fuel system problem), or not getting enough gas (carburetor or choke problem).
Compression problems are less common, unless the engine has been abused somehow. You can check for compression with a compression gage. Remove the spark plug, install the compression gage in the spark plug hole, then crank the engine with the throttle open and the choke off. If you get at least 60 or 70 psi when you do this test, the compression is probably not the problem.
.

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