Stupid Small Engine Q - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Benrs86 · 10-17-2002, 08:54 PM

hey guys, i have a 16 hp tecumseh in my attex sixwheeler. so i was getting it ready for winter and since the ignition key had been shocking me and not turning it off (i had to floor it choked to kill it) i got a new one. i put a wire going into the side of the eingine on the ignition terminal, a wire going to the selenoid to the start terminal, and one from BAT to the battery. and left the accesory terminal empty. now the thing is, if i disconnect the ignition wire it starts and runs fine, but wont turn off. if i connect the ignition wire then it doesnt get spark when the engine is turning over, it just gets spark when the key is in the OFF position? so basically it starts and runs fine, it just wont turn off, unless i connect the ignition wire. so is this wire going into the engine supposed to get 12 volts to turn the enigne off? or is something inside the engine messed up. all the wired in the engine go in this black box (where the magnet is to sense the flywheel. so does anybody have a manual, or know anything about this? there is also a big red wire that is the charge wire, and that is hooked up. but that is all the wires in the engine. so whats up????? thanks!, Ben

Gordo · 10-17-2002, 09:09 PM

That wire that is running into the back of the engine (to the magneto) is to "kill" the spark when it is grounded. My guess is the switch you installed is not the same as the original.

Alaskan · 10-17-2002, 09:45 PM

The switch was shocking you because it was'nt grounded properly. When you turn the switch off it should ground the ignition and stop the engine. Check the old switch, I bet it has a GND terminal. It was probably only shocking you when you tried to shut it off, with a bad ground you became the ground

.

This diagram is very simple but should help.

Benrs86 · 10-17-2002, 10:11 PM

wow, thanks a lot for the help. so i need a lawnmower key or somehting. where do i get one? the one i had was for a car, like hot ignition on run and start, but its supposed to be grounded when off and not grounded at start and run huh? thats crazy. theres probably not a way to rig up this new key i got to work huh? is this engine supposed to run with everyhtin disconnected? i started it then unplugged everyhting and it keeps going? i would really like to use this key if possibe (it was 17 dollars, and i already made the hole in the plastic bigger for it to fit) thanks a lot, Ben

oldyeller · 10-17-2002, 11:53 PM

the only way to use the "new" switch you got is to see if it has a terminal that is grounded when the key is off, you can do this with a ohm meter. if there is one, wire that terminal to the wire from the "black box". You will have to make sure that the case of the key switch is grounded to the case of the motor, (can use the frame as long as its connected). Your old switch probably had a bad contact between the key switch case, and the frame, that's why you were getting shocked. OR you could rig a toggle switch to the black box wire and to the frame, to kill the motor, would also serve as theft prevention if you hide it. Good luck..

10-17-2002, 08:54 PM	#1
Benrs86 Registered User Join Date: Feb 2000 Location: Brandon, SD, USA Posts: 1,292	Stupid Small Engine Q hey guys, i have a 16 hp tecumseh in my attex sixwheeler. so i was getting it ready for winter and since the ignition key had been shocking me and not turning it off (i had to floor it choked to kill it) i got a new one. i put a wire going into the side of the eingine on the ignition terminal, a wire going to the selenoid to the start terminal, and one from BAT to the battery. and left the accesory terminal empty. now the thing is, if i disconnect the ignition wire it starts and runs fine, but wont turn off. if i connect the ignition wire then it doesnt get spark when the engine is turning over, it just gets spark when the key is in the OFF position? so basically it starts and runs fine, it just wont turn off, unless i connect the ignition wire. so is this wire going into the engine supposed to get 12 volts to turn the enigne off? or is something inside the engine messed up. all the wired in the engine go in this black box (where the magnet is to sense the flywheel. so does anybody have a manual, or know anything about this? there is also a big red wire that is the charge wire, and that is hooked up. but that is all the wires in the engine. so whats up????? thanks!, Ben __________________ Brandon, SD 69 GMC 1/2 ton 2wd wide long bed with wood 3 on the tree 350 engine 4 bolt main rv cam AIM = Alphray04

10-17-2002, 09:09 PM	#2
Gordo Registered User Join Date: Jan 2001 Location: Killingworth, CT. USA Posts: 3,378	That wire that is running into the back of the engine (to the magneto) is to "kill" the spark when it is grounded. My guess is the switch you installed is not the same as the original. __________________ 1971 C10 swb stepside 350/700R4/3.73posi (retired as of 4/22/03) 1998 S10 short bed 2002 S10 Blazer 1942 Oldsmobile 1958 Massey Harris Pony 1951 Wife Killingworth, Connecticut May those who love us, love us, any of those who do not love us, may God turn their hearts. And if God is unable to turn their hearts, may he turn their ankles so we may know them by their limping. A man who works with his hands is a laborer; a man who works with his hands and his brain is a craftsman; but a man who works with his hands and his brain and his heart is an artist.

10-17-2002, 09:45 PM	#3
Alaskan Truck'n the alcan Join Date: Jan 2001 Location: Houston, AK Posts: 149	The switch was shocking you because it was'nt grounded properly. When you turn the switch off it should ground the ignition and stop the engine. Check the old switch, I bet it has a GND terminal. It was probably only shocking you when you tried to shut it off, with a bad ground you became the ground . This diagram is very simple but should help. Attached Images __________________ 68 GMC 4x4 71 C20 Custom Deluxe 83 1/2 ton conversion van

10-17-2002, 10:11 PM	#4
Benrs86 Registered User Join Date: Feb 2000 Location: Brandon, SD, USA Posts: 1,292	wow, thanks a lot for the help. so i need a lawnmower key or somehting. where do i get one? the one i had was for a car, like hot ignition on run and start, but its supposed to be grounded when off and not grounded at start and run huh? thats crazy. theres probably not a way to rig up this new key i got to work huh? is this engine supposed to run with everyhtin disconnected? i started it then unplugged everyhting and it keeps going? i would really like to use this key if possibe (it was 17 dollars, and i already made the hole in the plastic bigger for it to fit) thanks a lot, Ben __________________ Brandon, SD 69 GMC 1/2 ton 2wd wide long bed with wood 3 on the tree 350 engine 4 bolt main rv cam AIM = Alphray04

10-17-2002, 11:53 PM	#5
oldyeller Captain CAAAVVVMMMAAANNN! Join Date: Mar 2002 Location: Anna Texas Posts: 726	the only way to use the "new" switch you got is to see if it has a terminal that is grounded when the key is off, you can do this with a ohm meter. if there is one, wire that terminal to the wire from the "black box". You will have to make sure that the case of the key switch is grounded to the case of the motor, (can use the frame as long as its connected). Your old switch probably had a bad contact between the key switch case, and the frame, that's why you were getting shocked. OR you could rig a toggle switch to the black box wire and to the frame, to kill the motor, would also serve as theft prevention if you hide it. Good luck.. __________________ 72 LWB Fleetside C10 Custom 350/350 97 GMC Yukon 4X4 SLT Anna, Texas check out the project old yeller



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