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8N wont start

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Rokhd

11-12-2006 17:46:05




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A couple of weeks ago I posted questions about this tractor not running and I finally got to go back to the cabin and work on it again. It still isnt running. It has great spark, new plugs, cap, rotor, coil, points. Everything seems to be correct. I checked compression and it was low but should be plenty. #1 90 pounds #2 105 #3 100 and #4 95 this is a dry check I did not check it wet. I have sprayed starting fluid in the carb and it wouldnt hit. I have taken the exhaust off just in case of a restriction. I have also taken the carb apart today (it is in the dip tank now) and couldnt find any blockages, gumming, or anything else that would keep it from running. I am going to go ahead and rebuild it while I have it off. I was by myself so I couldnt try to pull start it. I was wondering if maybe the advance weights could have been stuck in the full advance position. Would this keep it from running? I live about a hour away from the cabin so I am trying to compile all the suggestions I can before I go back down there.

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Dell (WA)

11-12-2006 18:43:43




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 Re: 8N wont start in reply to Rokhd, 11-12-2006 17:46:05  
Rocky..... ..while yer compression readings ain't 'nuttin' to bragg about (Ford spec is 90psi, min, dry; yers are kindda all over the place) they are "acceptable" and will NOT prevent yer engine from starting and the dry check is ok for this purposes.

Ennytime you've been fuxxing around, trying to start a hard to start engine, you stand an excellent chance in FLOODING yer sparkies. And even iff'n you just replaced yer sparkies, REPLACE'EM AGAIN!!! 'cuz you've FLOODED yer sparkies. How do I know? because FLOODED SPARKIES won't sparkle even on ether quick-start.

The ONLY cure for FLOODED sparkies is FIRE in a running engine. Once you gittchur engine running, you can "swap" 1-sparkie at a time, and let the hot engine clean yer flood fouled sparkie. Flooded sparkies are contaminated by INVISIBLE un-leaded gasoline deposits. This beats trying to dry them with a plumbers propane torch. Save yer cleaned and dry sparkies for the NEXT-TIME you flood yer engine. (and there will be a next-time)

As a reminder, we recommend AutoLite AL-437 sparkies. They don't foul as eazy on no-lead gasoline.

You write..... ."I was wondering if maybe the advance weights could have been stuck in the full advance position"..... .NO, because they are "spring-loaded" to RETRACT. They occasionally get hung-up on a TOO-LONG ignition points screw in a RETRACTED position which will still eazily start but will have NO POWER at higher operating rpms..... ...Dell, yer self-appointed sparkie-meister

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Dunk

11-12-2006 18:53:35




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 Re: 8N wont start in reply to Dell (WA), 11-12-2006 18:43:43  
Preach it brother.

I know, I know, I ain't cha brother.

Gassed plugs will stop the show.

I can't remember gased plugs prior to 1975 or so.



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Dell (WA)

11-12-2006 19:02:31




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 Re: 8N wont start in reply to Dunk, 11-12-2006 18:53:35  
yeah donutts..... .about 1975? was when the smoggy EPA do-gooders MANDATORY insisted on no-lead for ALL flavors of gasoline..... ...Dell



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Rokhd

11-12-2006 18:10:09




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 Re: 8N wont start in reply to Rokhd, 11-12-2006 17:46:05  
Yes I have tried new plugs. Autolites I forget the number. I have the brightest blue spark you can ask for.



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Dunk

11-12-2006 18:03:36




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 Re: 8N wont start in reply to Rokhd, 11-12-2006 17:46:05  
Once again, dedicated to Dell (sparky)

only 3 thangsw youy need to run these tractors.

Fuel, and spark at the right time.

Hard to screw up the time but it can be done.

You have gassed the heck out of your plugs.

If you have spark and gas, that is the next thang.

Sometrimes I dry the one on my 4 wheeler with a propane torch.

I was pissed one day and tried it with the cutting torch.

The, well part, that is supposed to be a flat piece is now a ball on that plug.

I will go back to the propane torch.

The only thang that cures them gassed plugs is time... or heat...

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Bob

11-12-2006 18:03:06




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 Re: 8N wont start in reply to Rokhd, 11-12-2006 17:46:05  
If all else is OK, and it is too far advanced, it will "kick" against the starter.

Conversely, if the timing is late, or otherwise "off", it should spit, snort, backfire, or SOMETHING.

If you are not gettin' even a backfire, and have spark and gas (and ether), it sounds to me like you have spark plugs that are shorted from being wet with gas, or carbon fouled. At any point in this fiasco have you tried new spark plugs?

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Rod From IL

11-12-2006 18:36:35




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 Re: 8N wont start in reply to Bob, 11-12-2006 18:03:06  
I am far from a expert. and There are alot of others on here that have forgot more then I will know. BUT I have a Great little 48 8N that had the same thing going on. The advance weights were worn and out of place. I tryed EVERY THING lol While I was putting in EI I found this and fixed it.( this was a almost 2 year ordeal) SO I would say yes the advance can mess things up a bit. We all have to remember that this old gal is at his Caben he is leaving it for a week at a time or so. So fuel would dry by them I would think. But as I have said I am NO expert

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uh . . . Dell (WA)

11-12-2006 18:54:32




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 Re: 8N wont start in reply to Rod From IL, 11-12-2006 18:36:35  
Rod..... ..while flooded sparkies will probably "dry" in a weeks time, they STILL are contaminated by INVISIBLE no-lead gasoline deposits. Replace'em ennyways. AutoLite 437 are recommended because they don't seem to foul as eazily on no-lead gasoline. Fouling is DIFFERENT than FLOODING.

But you do make a valid point about mucked-up distributor centrifugal advance weights. This is a problem usually something experienced at higher rpms but usually not at starting..... ...Dell, yer self-appointed sparkie-meister

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