Small Engines (Lawn Mowers, etc.): JD Gx 255 Lawn tractor with Kohler engine, lawn tractor, multimeter


Question
Hi John,

I started my mower for the first time this season after changing the oil. Starter sounded a bit clunky, battery a bit low but it started and ran fine for 2 hours. Shut it off to trim. Went to restart, and the starter sounded clunkie again, engine coughed...would not start.
Then it seemed to kick over to this mode where the starter sounded fine and the engine turned, but no sign at all of starting (like a fuel cutout).
I discovered after that that the starter now engages directly from the ignition "On' position..even if I'm not in the seat with the brake on.
Went the throw parts at it route and replaced the ignition/board module. The On position then behaved, starter sounded clunky but engaged, almost started, but now I'm back to square one with a smooth sounding starter engages from the "On" position...and no sign of starting almost like I blew the board again (pure speculation here). That said there were a couple of times last week where the ignition behaved again for a try (proper 'On' position behavior) but would not start and quickly defaulted back to the "On' position starter engaging craziness.

Any thoughts...thanks

Answer
  Trying to get what you are saying, that it will "crank" in the "on" position, not the "crank" position, all the way to the
right.  It went somewhat back to normal when you installed an expensive part, then went back to the same behaviour....

Without going much farther, I feel you might have a bad wiring
"injury"....

Look around the moving steering parts, and close to the exhaust parts
and so on, look for damage.

If you see none, then the problem will need to be run down with a
multimeter and a wiring schematic....

Have a look about, and let me know....

Fish