View Full Version : mower problems

09-01-2009, 02:54 AM
i have a MTD Lwn Machine with a 16.5hp B&S. when i bought it the previous owner tore out all the wiring on it and was gong to replace it but never did. i found a way to wire the the mower to get it to start but i need some help figuring out a way to shut it off. it also has 2 wires that come off the bottom of the bowl on the carb and i would like to know what they are for and if i need them to have the mower running. the motor currently will turn over and will sometimes start up but it will shut off after a second. any ideas???


09-01-2009, 02:57 AM
well i know pullin the plug wire off will shut er down but i dont feel like getting the **** shocked out of me. and i dont have the old wiring harness or anything. i found a way to wire up the starter to start it up but ther are 2 sets of wires that i dont know where they hook up to or what they do. one set has a grey wire and a black wire and it looks like they are coming from the bottom of the bowl on the carb. the other set has a red wire and a black wire that look like there commin from under the flywheel. im not gonna use it for mowing its just gonna be used to get around my yard and to get firewood.

09-02-2009, 06:44 PM

Does this unit still have the original ignition switch in it ? If so post the model number from the white tag under the seat.

09-02-2009, 11:05 PM
yea it still has the ignition and i bought a new starter solenoid. the previous owner is obviously and idiot and he peeled the model nmber sticker off...

09-02-2009, 11:53 PM

No model number, We'll have to do this the harder way.....

Look on the back of the ignition switch, There will be letters stamped in the white base. If their not there look stamped on the spade terminal it's self.

I need these letters which will tell me where each wire needs to go.

09-03-2009, 12:34 AM
when you say ignition switch are you talking about the key ignition? sorry i dont know all the technical terms for som of the parts.

09-03-2009, 12:36 AM
stamped in the side of the keystart theres the code 1EB

09-03-2009, 12:45 AM
He is looking for the letters stamped into the bottom of the switch or on the terminals. There will be 1 letter that corresponds to each terminal.


09-03-2009, 12:50 AM
there isnt any letters like than on mine.

09-03-2009, 12:55 AM
Clean it up real well and look again. Probably stamped into the metal terminals.

Does the switch say Indak on it? If it does, there will be letters.

09-03-2009, 01:08 AM
ohh i found them, i didnt look on the back side of the tabs.does the order in which i type them matter?

09-03-2009, 01:16 AM
ok i found them. SMBGL.

09-03-2009, 07:49 PM
Thanks pugs.... Thumbs Up

Below is how to wire the engine to run hooking up the fuel cut-off solenoid on the carb and how to wire the engine to shut off.

It would be best to pull the top cover and trace the wire from the coil to assure you hook the proper black wire to the proper post on the switch.

Now, For the charging system, While the cover is off trace the wires off the stator, I think you said one was red. Is there just the one or another (need color) coming off the stator ?

Also need to know if there is a plastic connector plug on the end of these stator wires and what color this connector plug is....


09-03-2009, 10:16 PM
there isnt any conector plugs one the wires but they used to be a clear whitish color. and thanks for all the help!

09-03-2009, 10:47 PM
Well, Right next to the connector plug was/is a diode;


If the plug connector was cut off after the diode you can't wire up the charging circuit, You would need to find another stator to cut the wires off WAY after the diode and splice it on to yours or install a new stator (under the flywheel).....

09-03-2009, 11:16 PM
well i have all the conector plugs and the old wiring harness(is been disected beyond fix) and the diode was not there so im thinking it was cut off after the diode but ill check and see. thanks again!

09-04-2009, 05:10 AM
i was also thinking about the starter. ive been jumping the starter but i would like to use the solenoid to start it. i have all the power wires ran from the battery and to the starter and i have it grounded. but theres a smaller wire thats supposed to connect to the solenoid and i would like to know where that wire is originally supposed to go.

09-04-2009, 08:04 AM
You said you had it so it would crank so I figured you already had that part wired up.....

Run a wire from the "S" post to the small post on the solenoid and it will crank with the key.

09-04-2009, 08:30 AM
ok thanks. i knew the post on the solenoid went to the key ignition i just didnt know which post. thanks alot man, your a life savor!

09-04-2009, 11:55 AM
well i wired it up and tried to start her up and she wouldnt crank. i checked my work a dozen times and i did exactly as you told me. im wonderin if the key ignition is bad?

09-04-2009, 11:57 AM
oh and theres a red and a black wire comin off the stator.

09-04-2009, 01:12 PM
You said you had it so it would crank so I figured you already had that part wired up.....

OK, Lets start from the top.

You now have everything wired as per my instructions, So since the above isn't true the last step would be running a wire from the positive battery post WITH a 20 amp in-line fuse holder to the "B" post on the ignition switch.

The red stator wire will hook to the "L" post with the carb solenoid BUT if hooked up without the diode in place you will smoke the stator and have to replace it.

09-04-2009, 02:07 PM
ok thanks. the diode was gone cuz she started cookin. so now 30 bucks and she will be runnin!

09-04-2009, 06:56 PM
It will run NOW but it just won't keep the battery charged until the stator is replaced/hooked up.

09-04-2009, 08:20 PM
yea i know, but its not really worth ridin if it will only last a minute or two.

09-04-2009, 10:45 PM
Once you crank it the only thing drawing power from the battery is the fuel cut-off solenoid, On a fully charged battery it should run quite a long time until the battery needs a re-charge.

How long does it take to go get wood ?

09-05-2009, 02:10 AM
yea good point. i should work out well then untill i get the money.