Troy built bronco

[pawandmaw]

I have a troy built bronco model 37746 serial number 1c014h0591. Engine 18.5 briggs 31p777, 0293e1,040131zd.
The mower has no power, no lights, nothing.
The motor oil has gas in it. The mower has a good battery now, it had a brand new battery (2013 battery) in it and now that battery is "BAD" according to my Schumacher battery tester. The 20 amp fuse was not blown but I replaced it any how. The seat switch is jumped so it is not in the seat switch. So the next step is in the ignition switch , correct???? Or what would you check next. The starter was replaced by the owner last year also, he was so frustrated at it he just paid someone to mow his lawn.
Thanks for your help.
Paw

[bgsengine]

First, drain oil and refill with fresh oil, make sure you don't have gas leaking.. Do that first of all - gas fumes in crankcase can explode.

Next, start doing some logical , step by step trouble shooting. Remove spark plugs and clip on a grounded spark tester to each wire for the duration of testing - first, it removes compression that has to be overcome by any cranking, and second, when it does crank you'll be able to see if there is a spark.

Trace the battery cable from battery to solenoid , use a test meter to check for full battery voltage (Test probes on BATTERY TERMINALS, check voltage, Ground the meter test probe to the BATTERY GROUND wire and check for 12V to the solenoid post. Then inspect the power feed off that post (or off the battery post, whichever feeds power to small fused wire that goes to switch) - check for Battery voltage on the switch side of fuse holder.

If you have 12V power all the way to the switch, then check the "S" terminal of the switch (which typically feeds power to the solenoid start circuit) and turn key to start position, if you have 12V there, your switch is good enough that it should crank. Seat switch *usually* is not involved in start circuit, but PTO and Brake switch are.

Note IF you have a "Module" (has a triangular reverse push button for reverse mowing operation) , But that is unlikely, as your Bronco is probably older - around 2005 or so, if the engine is original, then testing is a bit more involved that trying to trace power through switches - the module takes small voltage readings fed to it from the safety switches to turn on small relays that control the power flow to the starter solenoid. But that's a moot point as your machine probably does *NOT* have that system, and much simpler and direct power flow through switches.

Model number needed is under the seat - Not 37746 (Probably is 13AJ609G766 or similar)

[KE4AVB]

After fixing the fuel problems then repair the electrical system.

First remove the jumpers from the seat switch connector all your doing grounding out the ignition kill circuit. Second these connectors sometimes have internal shorting strips to prevent owners from bypass the seat safety system. Also this mower has a manual ignition kill switch somewhere according to electrical diagram. (2003/2004 model base on engine date). Also the model number is more likely a 13AJ609G766.

But biggest key here there is no lights. Bad ignition switch, bad ground, or other bad electrical connections up to the ignition switch. Also since the previous owner had a dead battery disconnect the alternator as the diode may be shorted out draining the battery. This which would need to be tested before reconnecting.

[Deere2me]

I have a troy built bronco model 37746 serial number 1c014h0591. Engine 18.5 briggs 31p777, 0293e1,040131zd.
The mower has no power, no lights, nothing.
The motor oil has gas in it. The mower has a good battery now, it had a brand new battery (2013 battery) in it and now that battery is "BAD" according to my Schumacher battery tester. The 20 amp fuse was not blown but I replaced it any how. The seat switch is jumped so it is not in the seat switch. So the next step is in the ignition switch , correct???? Or what would you check next. The starter was replaced by the owner last year also, he was so frustrated at it he just paid someone to mow his lawn.
Thanks for your help.
Paw

You need to get ya an owners manual from the Troy Bilt website: http://www.troybilt.com/webapp/wcs/stor ... &langId=-1 The wiring diagram is in the manual. You do remember I mentioned that most mfg. have their own websites and can hook you up with a manual, right?