Question about Craftsman 42" Briggs Stratton 20 hp Gas Powered Riding Lawn Tractor

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I have had an electrical problem with this mower since ive had it. I have just changed the solenoid and switch and have looked at the wiring and switches all day and still nothing im getting power to the switch and to the solenoid but nothing happens when you turn the key no clicking or nothing power is not transferring to starter side of solenoid I can jump it off with a wire from the ignition to starter or from crossing poles of solenoid I went and bought another solenoid and that is not it, model is a1991 18.5hp briggs with 42 inch deck do ineed to replace wiring harness or how can i check that

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Soliniod should have two small terminals one should get power when turn key to start position the other runs through ground curcuit which runs through break and pto switch most tractors wont start with out break switch working properly i would start with that first the i would go to pto switch. hope this helps

Posted on Aug 01, 2010


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1 Answer

Get no voltage from selenoid to starter

Probably a safety switch, the ignition switch send electricity through a few safety switches on the way to the solenoid, neutral, brake on and deck off is what it is checking for .If you unplug the little wire on the solenoid and touch a wire from the pos + battery terminal of the battery to the spade on the solenoid it should turn over , and prove the solenoid is good or not.

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Have a Troy built bronco riding mower juice the selinoid but not out to the starter

The solenoid has two battery cables on it, one to the positive of the battery and the other to the starter. There is also a little wire on it that when electricity is supplied to it it should connect the two cables together internally in the solenoid. The little wire comes from the key switch through safety switches like on the seat and clutch brake pedal . A cheap quick test is to take a short piece of wire and touch the cable coming from the battery to the little wire terminal on the solenoid if it makes the starter work it is probably a safety switch or key switch issue not a bad solenoid or starter.

Apr 14, 2016 | Troy Garden

1 Answer

Soloenoid wiring diagram

Hi Ronnie, These three links below are youtube videos, 1st shows how to test your switches, The 2nd shows how to disable a seat switch and the 3rd shows how to test a solenoid, I hope this helps mate...... CHEERS..

How to test lawn mower electrical safety switches

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Apr 13, 2016 | Garden

1 Answer

Tractor will not crank over.Why?

Sounds like your battery cables on the starter is not working and needs replacing. i had a loose cable and would not work.Your solenoid may be bad as well.

Nov 07, 2015 | Garden

1 Answer

Craftsman mower deck engaging intermitantly

I believe I would start by looking at the grounding for the solenoid(clutch) sounds like that it may be intermittent. Or the spring assembly that physically engages the assembly on the deck my be dirty or need a lubricant and a cleaning or both. Good Luck

Jun 04, 2012 | Garden

1 Answer

Riding mower with 26hp briggs and stratton motor runs about 20 to 30 minutes thens cuts out

It sounds electrical in nature check the solenoid for continuity, check your key switch it may be bad also, check the spark plug wires and the part they hook into. Look for melted wires and replace as needed.

May 11, 2012 | Husqvarna Garden

1 Answer

I have a yard machines 46 inch cut 18.5 hp riding mower that wont start. i changed ignition swith and soleniod. if i cross wires on solenoid it will start after putting gas in carb. it runs till gas runs...

I would start with the safty switches. Look for them on the deck engager, seat??, break/clutch pedel,blade engager lever. Remember the blade sw. must be disengaged be fore it will start. Ifit runs as you said It is in the wiring/ electrical system. I know it is not in the ignition sw. or seloniod. szm230

Apr 15, 2011 | Yard Machines Garden

1 Answer

Solenoid wires to be replaced

I posted this for a similar question.

The large red cable from the battery should go to the large terminal on one side of the solenoid. The opposite side of the battery solenoid connection goes to the starter So now you have a heavy cable going from the battery to one side of the solenoid and another heavy cable (red) going to the starter connection. There should also be a small wire coming from the ignition switch to the small terminal on solenoid. If there are two small terminals on solenoid, ground the other one. To test the ignition switch, just turn the key and see if you get 12 volts, then you know that part is good. If not, check your ignition switch. So, back to the solenoid-----. If there are two small solenoid terminals with nuts for wires on the solenoid then the wires could be mixed up. So just reverse the two small wires and try again.

You would think they would make things easy and say on the solenoid, Battery connection here, and Starter connection here, and ignition switch wire here, but no, just nothing for the most part.

So now remember this is nothing more than a lightswitch type of a mechanism where instead of using your finger to flick the switch, we are using a small electric charge to momentarily close the light switch, in this case the starter motor, same idea.

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3 Answers

Murray riding lawn mower

with switch off try crossing out the solenoid. take an old screwdriver and place it on the two metal contacts jetting out from the solenoid usually by the battery or close to the ignition. if strarter engages when this is donr replace solenoid. if not replace starter. hope this helps.

Sep 06, 2008 | Garden

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