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8N won't run

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8Nnewwowner

08-16-2005 05:12:21

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There were no electrical wires attached upon receiving the Tractor. I have run jumpers, from the resistor, solenoid ign and bat positve. The only way to get it to crank is if a negative wire is introduced in the mix
While cranking fine, it will not start. Compression is approx 100psi at all four, fire at all the plugs, some evidence of fuel at the plugs.

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souNdguy

08-16-2005 07:55:12

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Re: 8N won't run in reply to 8Nnewwowner, 08-16-2005 05:12:21

As the others mentioned.. you have given us virtually NO info to go on. Is it 6v or 12v and positive or negative ground.

In short, find the battery wire that is not grounded.. jumper that to one side of the resistor.. then jumper other side of the resistor to the coil.. It's hotwired at that point. now crank it over.. it should start, or at least get spark to the plugs if everything else is fine. To kill it.. you have to remove a jumper wire. once you get it runing.. get a wire harness.. or replace the jumpers with point to point wireing.. and add an inline ignition switch int he line before the resistor. Use the 3rd bottom terminal on the resistor as a convienient wire point.

ALso.. N's were OEM 6v positive ground from the factory. If it has an alternator on it, a 12v battery.. or a non oem genny.. all bets are off.. and you will have to decide what you have..( most likely neg grnd on an alternator except in rare cases.. )

Soundguy

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8Nnewowner

08-21-2005 09:50:28

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Re: 8N won't run in reply to souNdguy, 08-16-2005 07:55:12

thanks guys,
Found a real mess!! It is neg 12v grd. Found mechanical timing 180 d off. Now thats corrected, real prob with Marvel Schebler Carb. Not sure model #. Parts guy helped with kit...Once it was cleaned etc and ports/venturi's are clean made big difference. Floats are set at 1/4 from front edge, Problem now is fuel runs out of intake... Engine try's real hard to start.. sputters and thats it. Fire at all the right places, compression and vacuum are good. Sat in a field for 3 years and untold number of previous guys tryed to get it runnin' Any idea's?????

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souNdguy

08-22-2005 04:57:30

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Re: 8N won't run in reply to 8Nnewowner, 08-21-2005 09:50:28

Sounds like you are getting closer. Fuel running out of the intake means the float is sticking, the float is heavy, or not set correctly, or the needle is not seating in the seat due to a piece of trash, or the seat is damaged. Most likely cause is some dirt int he seat. A rap from a screwdriver handle to the side of the carb usually solves this.. if not.. pull the carb for a seat/needle cleaning again. Also.. make sure the elbow going into the carb has a fuel strainer screen on the end.. they have a tendency to rust away after years of non-use. TSC and NH sell new elbows with screens for a buck or two.

Carb is probably a MS 241 variant.. ( a,b,c ).. though could be a TSX 33 from a 9n or 2n.. virtually same carb.. same rebuild kit works for both.. etc.

Flooding out due to the fuel needle/seat issue could be your main problem for not starting now.. these engines don't like to start when flooded.

Soundguy

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8Nnewowner

08-23-2005 18:03:37

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Re: 8N won't run in reply to souNdguy, 08-22-2005 04:57:30

K, Now I have tryed it all. Almost everything is new or rebuilt. Carb not leaking anymore...Timing is on... Excellent spark..., Bendix kicks out like it's goin to start. Still no go.. cranks till battery almost dead...Is anyones crystal ball workin???

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souNdguy

08-24-2005 06:42:16

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Re: 8N won't run in reply to 8Nnewowner, 08-23-2005 18:03:37

Try some ether. If it is killing a 12v battery.. something still isn't right.

Soundguy

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8Nnewwowner

08-24-2005 12:46:23

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Re: 8N won't run in reply to souNdguy, 08-24-2005 06:42:16

If she fires up, it"s either the Carb or intake,... right?
I"ve notes on Point gap at both .15 and .22 Which is closer to being right?
At .22 there"s more of an impression it"s fgoing to start than at .15.
Startin to think I should take a video an postIT!!!

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souNdguy

08-24-2005 12:49:29

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Re: 8N won't run in reply to 8Nnewwowner, 08-24-2005 12:46:23

.015 on front mounts... .025 on side mounts..

Soundguy

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8nnewowner

08-25-2005 18:17:22

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Re: 8N won't run in reply to souNdguy, 08-24-2005 12:49:29

About to give up.
Has Compression, spark,timing is on, fuel(even tried ether!) Points are set at .025.
Cranks wonderful, coughs and sputters occasionally enough to be encouraged.
NEW coil, resistor, carb kit. Anyone have any idears????

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souNdguy

08-25-2005 20:12:10

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Re: 8N won't run in reply to 8nnewowner, 08-25-2005 18:17:22

I forget.. is this a 12v setup or 6v? If 12v.. why did you get a coil and resistor.. for the side mount jobs a real 12v coil is available.

If you have compression, spark at the right time, fuel and air.. it should run.. obviously one is missing or low.

If it won't hit on ether.. that points towards spark or compression.. and rules out air as you usually apply either thru carb inlet.

Check spark again... should be bright blue and snappy.. able to jump at least a 3/16 air gap. Compression should be 90psi to be in spec.. though high 70's and 80's should fire right up.. 60's and lower will be worn out engine.

If still 6v.. try starting it with 12v right ont he starter.. or even try pull starting it.. that gets the revs up for even a 50psi worn engine..

Soundguy

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8Nnewowner

08-22-2005 17:19:47

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Re: 8N won't run in reply to souNdguy, 08-22-2005 04:57:30

Thnks souNdguy, your right on the $ it's a TSX33. Pulled it off changed needle & seat...same thing. really frustrating... No Strainer, try to find one and try that when put it back together. It's completely apart again soaking. CAn't wait to find problem so i can enjoy the next one.
I'll let you know if things work out.

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Danny in CO

08-16-2005 07:40:33

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Re: 8N won't run in reply to 8Nnewwowner, 08-16-2005 05:12:21

Here is a link to wiring diagrams for N tractors. The hard part is deciding which is right for your tractor. Is it original 6 volts positive ground? Has it been converted to 12 volts? ...

Good luck,
Danny

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BOb

08-16-2005 05:23:50

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Re: 8N won't run in reply to 8Nnewwowner, 08-16-2005 05:12:21

Have you checked for spark at the plugs? At the very least, it is likely that the points may need to be polished up a bit.

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