Re: Problem with getting JD STX38 to run
It's great to have your help, Brad. I'm still working on some of your questions but wanted to get the one's I can presently answer out of the way.
Alright, first the manual. The one I have is the service manual from Kohler's site in .pdf format for the CV12.5s, spec 1270. On the back cover, it is identified as "FORM NO.: TP-2339-D".
There is compression. I forget the measurement but will check again for confirmation. It did seem a bit low but I also measured the compression of my dad's "running" stx38, which was only slightly higher, for whatever that is worth. Granted, my tester is an older inherited tool (not the thread-in type), but the previous owner wasn't the sort of gentleman to keep inoperable equipment in his kit so hopefully it is close to accurate.
This carb is a Walbro without a shutoff solenoid - just the float bowl. You suggested inspecting the fuel I catch from the bowl for debris & water. I'm not sure what to look for to identify whether there's any water present.
Speaking of the cam/crank timing, are you referring to (sections 9 & 11 if we happen to be looking in the same manual) the timing marks on any of the shaft gears in the crankcase, or something else?
On my way out to make use of whatever daylight still remains. I plan also to recheck the spark, measure resistance from the ignition module lamination stack to the high tension lead, and disconnect the kill wire to be redundant in checking function of the coil. Since my knowledge and understanding are limited I hope these last two, that were mentioned somewhere in the stacks of what I've recently read, won't be a waste of time.