Hello, i have a 16LTH Simplicity with a Briggs Vanguard engine...303777 0122-01 5526 90041811. The fuel shut off was bad so i replaced with an electric inline one. When engine is hot it don t want to stop, found on internet what i had But 170.00 in cost and that`s to much. the inline one takes awhile to shut off.....a lot of fuel inline valve to carb...the only thing i can do if put a switch on dash to shut valve off and wait for engine to die..............is there a better way thanks for reading
I’m confused, would you please provide us with pictures of the old fuel shutoff and the electric inline shutoff you installed. The only fuel shutoff on that Briggs engine is the electric solenoid mounted on the bottom of the carb, which is electric.
Auto Doc's
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You should be at idle when shutting down.
FixItFrank
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I think you have two options. Try letting the engine idle for a minute to cool down before you turn it off. That worked for me on a similar tractor.
Or look for an 'aftermarket' replacement for that solenoid. You can usually find them for $30 or $40 instead of $170.
Or look for an 'aftermarket' replacement for that solenoid. You can usually find them for $30 or $40 instead of $170.
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I'm think IL has the right idea on this but also it necessary to have the correct solenoid. The problem is both coils seldom fail so it is more likely a wiring or switch problem.
The original fuel solenoid was to block the main jet and quickly stave the engine of raw fuel entering the exhaust and exploding. Now with you current solenoid you are having to run the engine until all the fuel in the carburetor is used up.
The fuel solenoid pn for date code of 1990 is 807744 which is a design that simply cost due to the tariffs and Briggs greed.
Now if you are quick you can get one for $85 using the 690924 PN which was supersedes to 807744. Now this is based on Briggs Power Portal info on the supersedes. The solenoid maybe of a different design. Now take with a grain of salt as I am using their info so I the OEM has the correct info. There is another version of this solenoid but would require new wiring.
Briggs 690924
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ILENGINE
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But also need to keep in mind that there are a handful of mowers out there that were designed without a kill wire connected to the ignition modules. They use the fuel solenoid depowering to kill the engine by shutting off the fuel. So incorrect fuel solenoid on the carb, or one that has been modified will not kill the engine.
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And I have ran into those myself and I usually leave them as is; unless, I having a problem with shutdown then it is a little rewiring. But is better to shutdown the coils whenever possible. I had a mower in last year in the seat switch connector had gotten to where the shorting strip was causing it not to start. Some DIYer just clipped the kill wire at the engine under the shroud. This was a safety issue the customer was complaining about as the mower would not shut down if he got the seat.
Now JD is one that uses the fuel solenoid the shut some the ZTR series mowers but that is done through relays or the ECUs. They also have the oil pressure switch into the circuit so cranking time is longer as oil pressure must be present to activate the system.
Now JD is one that uses the fuel solenoid the shut some the ZTR series mowers but that is done through relays or the ECUs. They also have the oil pressure switch into the circuit so cranking time is longer as oil pressure must be present to activate the system.
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Hello D.,
This mower model shows to be made from 1990-1993. We would need the product label information to confirm.
These B&S engines require a combination of functions to shut the motor down as quickly as possible. The ignition switch has to short/ground out both coils and also cut power to the carburetor bowl solenoid at the same time for the quickest possible shutdown.
You will likely not improve the situation by trying to modify or re-engineer the original system design.
Keep it simple. There is no true "instant off" with just the push of a button. I recommend installing a manual fuel shutoff near the fuel pulse pump inlet. Turn the valve off and set the engine at low idle. It will gradually run out of fuel in the carburetor bowl and quit running.
It is also likely that the ignition coil "kill" function is not working for some reason.
I suspect if you remove the upper fan cover/shroud, you will find one or both coils disconnected. That is likely because the kill wire harness segment needs to be replaced due to a bad inline diode. I've seen a lot of V-twin mowers parted out or sent to salvage for this simple yet ingenious little harness that B&S uses.
Ignition switches can also create some strange problems when the internal contacts have worn down. Be aware that not all switches are designed the same. They can have the same appearance on the outside but be totally different on the inside. The pin locations and letter assignments have to be an exact match.
If the switch has been replaced in the past, it could easily be the wrong ignition switch was installed.
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