48 6volt N stalling

John, NY

Member
I have a 48N runs fine for about 5 minutes, misses once, then about 10 seconds later, she stalls out. I"ve checked gas flow at the bottom of the carb, I have good flow (I let about a quart drain out). I also jumped the ignition switch (ran her without a key), she still stalled. I have a healthy spark over a WIDE gap on a test plug, and the front mount coil is cold to the touch. I thought I just fixed the problem by replacing the condenser, it was the only thing I could blame at this point, but I still have the same problem.

The really strange thing is that IMMEDIATELY after stalling, I can re-start her right up... I"m talking within 2 seconds of stalling.... then she will run for another 5 minutes or so then stall again…..

Can anybody offer any advice please?

Thank You
 
John........didja know yer carbie has about 5-mins runtime of fuel in it. Once yer carbie runs outta fuel, guess what??? It DIES.

Didja know yer gravity operated gas flow will STOP iff'n the gas vent is CLOGGED and VACUUM will STOP yer carbie from gittin' refilled. Try un-capping yer VACUUM CLOGGED gastank and guess what will happen??? Gitta NEW GAS CAP. Problem solved. New gas cap has a built-in vent and a roll-over prevent leak valve. ........clogged Dell
 
Hi Dell, I can see through a small hole drilled in the center of my gas cap, I have the stalling issue even with the cap off the tractor. I just re-re-re tested fuel flow, I sat at the carb waiting for the stall, less than 15 seconds after the stall I had the 7/16 nut off the bottom of the carb, and I had gas running out. I'm totally stumped! Help.. pleeeze!
 
" less than 15 seconds after the stall I had the 7/16 nut off the bottom of the carb, and I had gas running out. "

For how long?

How long did it take you to check spark?
50 Tips
 
VERY possible, I can't imagine how water got in there, but its something I did not consider. I already let about a quart of gas drain out of the bottom 7/16 bolt this morning. How would I test for water? Would draining the carb to a Glass jar be enough to show anything? The tank is full (minus the quart).
 
Hi Bruce,

This last time I did not test for spark, but the tractor did start right up again after testing gas flow. Each time she stalls out, I immediately am able to restart the tractor. When I did test spark yesterday, I had a jump across a 3/16" gap.
 
John, to test for water. Put 1/2 cup of the fuel in a glass measuring cup. Add 1/4 cup water. Let the cup stand for a while. The water will settle to the bottom of the cup. If there is more than 1/4 cup at the bottom, the extra was in the fuel to start with.
 
I wonder if there is a particle of dirt/rust in the carb that gets sucked into a jet or other small oriface then drops out after the engine quits/suction stops. I would try a thorough cleaning and blow out internals of carb to see if this could be the gremlin in your N.

Dirty/burned/mis-adjusted points can cause odd behavior but I would not expect it to be so repeatable in time between events.
 
Sounds electrical. Almost like a loose connection. Can you alligator clip leads from a DVOM to the coil and let it run until it dies?
 
I'm starting to wonder if its in the coil itself. If I have a small short in the coil, just enough to knock out spark, would that generate enough heat to be felt on the surface of the coil? Maybe the short is on the engine side of the coil and not generating enough heat to be felt. I had a problem with a "new" coil years ago, and resorted to replacing it with the only coil I had on hand, (possibly the original... at least it looks old enough).... I'm wondering if that coil is now shorting out.... but if this is the case, would this short cool down fast enough to immediately restart the tractor? nothing fits!
 
To answer your question...no from my experience. Usually shorts cause heat and components usually don"t cool down that fast. I recently replaced a new ignition switch with less than one hour run time on it due to losing power at the coil. How it dies can be telling as well. In my experience fuel issues can cause a "floating away" before dying where electrical issues are more of a "key off" dying. Follow your evidence. Hope this helps. Gerard
 
First off, Thank you all for all your input, I learned lots. Just as a fluke I started jiggling wires while the tractor was running, and the FIRST wire I touched made the tractor want to stall, I moved the wire back she ran like a charm, moved the wire away, wants to stall..... It was the wire to the solenoid that i think comes from the ammeter that came loose in its eyelet, as I tested, the wire came completely out of the eyelet. I pressed on a new one, cleaned all connections, and she has not stalled yet!

Thanks again for all your help!
 

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