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8N - having trouble getting it started

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Olaf Edgar

01-23-2005 09:21:06




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I recently bought an 8N. When I went to pick it up, the owner couldn't start it on it's own but we were able to pull start it and I drove it home and it ran great, never missed and had good power. Once I got it home I decided to take it apart and sort of go through stuff, I replaced the wiring harness, new spark plugs and wires, cleaned the gas tank out and the gas bowl under the tank and rebuilt the carb with a kit. Mind you I have not done a carb rebuild before but was told this is the easiest one to do. Well, here in lies the problem. I have a small gas tank hooked up to the carb, as soon as I turn the gas on, gas runs right through the carb and on the ground. Also, I have had it start to run but as soon as I take my hand off the starter it quits. I'm sure it's in the carb but I took it apart twice and everything seems to be like it should. Any advice would be greatly appreciated. Thanks

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Olaf

01-25-2005 17:41:40




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 thanks for the help in reply to Olaf Edgar, 01-23-2005 09:21:06  
just wanted to thank everyone for all their input. i finally got the old gal running, float is not stuck anymore, i did have the spark plugs in the right order and one thing i had wrong was having the a wire on the wrong side of the solenoid, it won't run with the yellow wire not with power. one thing that i have noticed is the carb seems to seap gas aroung the whole thing, and a little bit of gas drips out the air intake, could that be from screw assembly where the float needle is not being tight enought?

thanks again everyone

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Dell (WA)

01-23-2005 10:17:33




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 Re: 8N - having trouble getting it started in reply to Olaf Edgar, 01-23-2005 09:21:06  
Olif..... ..because the N-Tractor carb system is gravity fed, fuel will flow anytime the float operated fuel-valve is open. Inspect it carefully. Your float hingpin could have jumped its locating sockets. Your float could be full of gas and won't float. (tip: submerge your float in glass jar full of HOT WATER and watch for fine trickle of air bubbles) Your fuelvalve pin could be sticking open.

Learn to adjust yer carb. Both Ford and Marvel/Schebler say to open BOTH the downpoint mainjet and the sidepointing idlemixture to 1-turn as a starting point. I set my mainjet to 1-1/2 turns and LEAVITT!!!

I then adjust the sidepointing idlemixture for maximum idle rpms; not smoothest running, MAX RPM's, understand? The N-Idle is a SLOOOoooww 400 rpms and is set by the behind the carb throttle setscrew. Remember the idlemixture is BASSACKWARDS, out for lean, IN for INRICH. ok? My Idlemixture usually is about 3/8 turn.

You replaced yer OLD driedout sparkie wires with soft limp coppercore wires, 1,2,4,3 CCW, didn't you? That means:
Sparkie #1 is connected to nipple #1 at 10 o'clock
Sparkie #2 is connected to nipple #2 at 8 o'clock
simple, eh? now PAY ATTENTION 'cuz it gitts trickey here
Sparkie #4 is connected to nipple #3 at 4 o'clock
Sparkie #3 is connected to nipple #4 at 2 o'clock
therefore firing order is 1,2,4,3...isn't that amazing?

HTH..... ...Dell, self-appointed tuneup-meister

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GUY T.

01-23-2005 12:09:10




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 Re: 8N - having trouble getting it started in reply to Dell (WA), 01-23-2005 10:17:33  
HI DELL,
I am in the process of changing sparkie wires on my 52 8N and would like some clarification to your notes : Does this apply to the side mount distributor ? when you refer to # 1 nipple at 10 o'clock : is that viewed from the drivers seat ? e.g. # 1 nipple would be pointing sideways towards the radiator ?
Getting it right to locate # 1 is key to this whole exercise.
Thanks ....GUY T. QUEBEC CANADA.

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Dell (WA)

01-23-2005 12:38:24




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 Re: 8N - having trouble getting it started in reply to GUY T., 01-23-2005 12:09:10  
Guy..... ...the 1952 8N sidemount has a 5-nipple crowncap. Its firing order is also 1,2,4,3, CCW. Usually #1 is molded into the cap and start clocking from there. Iff'n in doubt, always replace 1-sparkie wire at a time..... ....Dell, self-appointed sparkie-meister



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GUY THIVIERGE

01-23-2005 17:01:12




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 Re: 8N - having trouble getting it started in reply to Dell (WA), 01-23-2005 12:38:24  
DELL, let me explain how this project kind of turned sour: I pulled the old cap & the wires attached to it based on the fact that both caps ( the old one and the new Tisco one ) did indicate where # 1 was ... problem is that # 1 location is 180 degrees apart on both caps ...I can always do a compression test on # 1 and find out the rotor position when # 1 is ready to fire...but I tought it would be faster to ask the question on the forum...that is why I was inquiring about the exact physical location of # 1 Nipple on the cap/distributor.

thanks for the reply ...GUY T. QUEBEC CANADA

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GUY THIVIERGE

01-23-2005 19:24:38




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 Re: 8N - having trouble getting it started in reply to GUY THIVIERGE, 01-23-2005 17:01:12  
DELL,
thanks for the info...I guess the answer is # 1 position on the distributor/cap is floating.So I have to go the compression route to get it right.

GUY T. QUEBEC CANADA



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Dell (WA)

01-23-2005 19:10:52




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 Re: 8N - having trouble getting it started in reply to GUY THIVIERGE, 01-23-2005 17:01:12  
Guy..... ...the #1 nipple of sidemount distributor can be clocked ennywhere depending upon where and how the distributor gear was pointing when installed. The 5-nipple crowncap is indexed by a notch/slot in distributor body.

The 4-nipple frontmount crabcap is fixed by 2-bolts and is driven by an off-set cam slot scheme and therefore the #1 nipple is ALWAYS at 10 o'clock. Both the frontmount and sidemount are timed 1,2,4,3 CCW..... ...respectfully, Dell

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Jeb2N

01-23-2005 10:03:59




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 Re: 8N - having trouble getting it started in reply to Olaf Edgar, 01-23-2005 09:21:06  
Gas running straight through the carb is a sign that the float is stuck. Take the brass float out and first of all, make sure it doesn't sink in water. Hold it under water and look for air bubbles. Also, (and this is a little trickier), check to make sure that the sides of the float aren't rubbing up against the sides of the bowl as it moves up and down (not dragging anywhere).

If you already have a rebuild kit, replace the float needle and seat with the new ones in the kit and make sure the seat is screwed down tight. I took a flat file and ground it down so it was a perfect fit for tightening the seat. You can double check yourself when you're done by blowing (with your mouth) through the carb elbow. Air should go through when the carb is right-side up, but not when you turn the carb upside down.

Jeb

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TIMW(PA)

01-23-2005 10:02:40




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 Re: 8N - having trouble getting it started in reply to Olaf Edgar, 01-23-2005 09:21:06  
Alot of people have trouble with the vitron tipped float needle. Often putting the old brass one back in works. You need to make sure that the float is set right. Turn it upside down and the float should be around a 1/4 inch clearence between the float and the gasket. Check also that your "float dosent" It may have a hole in it. You can do the rattle test and shake it to hear, or I've heard to put it in a pan of hot water and look for bubbles(obviously you'd have to hold it down with a spoon or something. Any one of thos problems will cause the gas to run out....Good luck...Tim

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