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8n quits

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Raymond Hitchco

07-21-2000 13:16:03




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Been struggling with 8N quiting erratically. I can mow all day at times and mostly lately it quits after about 15 to 45 minutes. It is an immediate cut out, no sputtering, backfire or other indications. Sometimes it immediately restarts and other times it must cool for 1- 3 hours. Have not had a problem in the winter. Most problems have been while mowing with a 5' brush hog in a fairly rough pasture.

The tractor has the distributor mounted on the side and coil in front. It was converted to 12 volts. It has a resistor to reduce juice to points. Due to some earlier repairs the serial number is unreadable.

Have replaced the ignition switch, coil (used Delco from car), checked the fuel filters in the carb - clean, and the shutoff bowl (had rust in it on the bottom), and it has new points and condensor. Two mechanics have told me the distributor looks fine with some wear. Primary wire seems grease free and mechanics say thats not the problem, although they don't have a clue.

Its in the shop now and the mechanic has run it under load for 2 hours and has had it running with implements for 6 hours. Its cooler here in the NW today. Of course, it won't quit now.

My neighbor has an 9N that does the same thing on occasion. AT times it seems to be when the tractor has been working for a while with a mild load and then a bump or wad of grass causes the governor to kick in. Can't imagine the govenor having anything to do with it. But of course our Governor is Jesse "the mind". Perhaps he is doing it? (:>)

Help????? ????? ????? ????? ????

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tommy g

07-04-2004 17:00:22




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 Re: 8n quits in reply to Raymond Hitchcock, 07-21-2000 13:16:03  
Insulate gas line over engine. Gas is vaporizing from heat from engine. Vapor lock basically. I cut piece of rubber gas line length wise and cable tied it around gas line.



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siinc

07-22-2000 09:52:42




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 Re: 8n quits in reply to Raymond Hitchcock, 07-21-2000 13:16:03  
Rust in the filter/supply bowl may mean junk in the float bowl of the carb. Rough terrain underload jostles the junk near the main jet, which tries to suck it through, clogs the jet, and kills the engine. After some indeterminate period of time, the junk floats away from the jet, tractor starts and runs forever when not jostled or under load. Test by spraying starting fluid into the carb. If the tractor tries to start then dies, the prob is fuel.
Just my 2 cents.
Siinc

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DaughtofRay

08-01-2000 14:23:14




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 Re: Re: 8n quits in reply to siinc, 07-22-2000 09:52:42  
Well folks, just walked back from the tractor now sitting in the field again. Tractor returned from shop last week-- mechanic found a loose wire to alternator and cleaned out the carb. They ran the tractor under load on the Dyno for 6+ hours and never got it to quit. I used the brush hog for 3 1/2 hours yesterday in hot, humid weather. The tractor ran very strong. Hit a gopher hotel and broke up the sleeve in the temporary clutch (the clutch we wanted was on backorder). Tractor killed when I hit the gopher hotel but restarted within 30 seconds. Bought a new clutch (the proper one-no sleeve). Learned how to take old clutch off, put new one on, take new one off (return faulty clutch to store), put second new one.... (: THEN, ran tractor for 1 hour with brush hog, finished field and on the way back to the barn (only under the load of the brush hog NOT cutting anything and lumbering downhill in first gear) she dies.... won't start. The saga continues..... Argh.

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Gary P

07-22-2000 09:40:40




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 Re: 8n quits in reply to Raymond Hitchcock, 07-21-2000 13:16:03  
I recommend that all old (pre- 1980) gasoline engines that are already using 12 volts be converted to electronic ignition! The benefits are numerous. The engine will run better than new and save alot of fuel. I convert point type ignitions with a used chrysler dodge or plymouth ignition system. It is readily availablein a junk yard



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GARY P

07-23-2000 14:32:46




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 Re: Re: 8n quits in reply to Gary P, 07-22-2000 09:40:40  
Mopar ignition swap (12v) for all point type engines. The swap is wery simple for even wisconsin engines. You must do some basic lathe work, but wisc. one cyl engines use a short distributor in which a mopar 6cyl distributor is an almost exact fit. Disassemble the mopar dist. and turn down the machined housing to match wisc. size apprx. .030". The housing length is perfect. Use opposite side of mopar shaft and drill oversize to match wisc gear pin. Take housing and turn I.D. (where backing plate mounts into) down deeper by about 3/8" (makes for a super short dist when fully assembled). Mount backing plate by drilling two new holes (simple). Measure distance for mopar bronse bushing (assemble lower half of dist. (paper washer, Wisc dist lock, o-ring, cast housing, gear and pin). Simple measurement will reveal approx .120" (cut bush to reqd size and install for proper oem pickup wheel distance to backing plate). Grind off all but one tooth off of the mopar pick-up wheel, (one is for one cyl, two and four need to come from V-8 wheel, 3 and 6 cyl from slant six wheel). Weld pickup on shaft and finish assembling using a plastic cap for cover. Simple two wires from pickup to elect box and coil + and coil - to box thats it. IT ONLY TAKES ABOUT AS MUCH TIME TO ACTUALLY PERFORM THIS CONVERSION AS IT DOES FOR ME TO TYPE THIS WITH ONE FINGER!! Your engine will now start instantly (because of the multiple spark discharge) and run as steady as a well tuned DIESEL!! Best of all everybody knows where to find junked out mopars for next to free ignition parts that work!

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norm-wy

07-21-2000 14:47:35




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 Re: 8n quits in reply to Raymond Hitchcock, 07-21-2000 13:16:03  
Ray
You should make some voltage measurements on your original coil and compare with the same measurements with your Delco coil from the car. You should be seeing 12V on both low voltage terminals of your coil when the points are open and then you should see some pos V on the pos terminal and 0V on the neg terminal when the points are closed. It's possible that the original coil is going bad and the Delco coil isn't compatible with your 12V conversion setup. Post your voltage readings and we'll go from there. HTH

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