running rough

[Rustysalmon]

so i finally got my 1950 8n back together, its been about 5 years since in ran last and it ran great. now that its restored its not running so great. I can get it to start, but it seems like it"s miss firing, the number 3 and 4 plugs are carbon after running it for awhile, and the govoner steps in every time to stop it from stalling but it revs it way too high. I"ve rebuilt the carb and gone over all the electrical with no luck. can anyone help me before I miss my dead line in two week?

Thanks Rusty

 

[Dunk]

(quoted from post at 19:07:35 08/26/09) so i finally got my 1950 8n back together, its been about 5 years since in ran last and it ran great. now that its restored its not running so great. I can get it to start, but it seems like it"s miss firing, the number 3 and 4 plugs are carbon after running it for awhile, and the govoner steps in every time to stop it from stalling but it revs it way too high. I"ve rebuilt the carb and gone over all the electrical with no luck. can anyone help me before I miss my dead line in two week?

Thanks Rusty

Firing order is 1,2,4,3

 

[Dell (WA)]

Rusty.......you do realize after setting for 5yrs, yer IGNITION POINTS are all crudded up with invisible contaminates, don't you? New points, gap = 0.015". .......Dell, yer self-appointed sparkie-meister

 

[Rustysalmon]

gaps good, points look good, and the firing order is on the money just it seems like 3 and 4 will miss fire. but it doesnt die off or stall just the govenor will kick in and out, every 5 seconds. ill go over the points and the firing order once again cause it can never hurt to make sure something is not wrong. so i drove it around the driveway today it seemed to run abit better doing that but still missing every 5 seconds but drivable for awhile. any more hints/tips?

Thanks Rusty

 

[Dunk]

(quoted from post at 20:55:25 08/26/09) gaps good, points look good, and the firing order is on the money just it seems like 3 and 4 will miss fire. but it doesnt die off or stall just the govenor will kick in and out, every 5 seconds. ill go over the points and the firing order once again cause it can never hurt to make sure something is not wrong. so i drove it around the driveway today it seemed to run abit better doing that but still missing every 5 seconds but drivable for awhile. any more hints/tips?

Thanks Rusty

While you are checking your points gap again, check it on all 4 lobes.

 

[Jim Phillips]

Check to make sure that you don't have tank corrosion in the fuel line or tank filter. Just had it in mine. It makes it sound like it's missing.

 

[Rustysalmon]

i couldn't get my hands that far into check the gap but im still sure that it wouldnt of moved. I rebuilt the engine took it to a show a it ran too well. I put it in the garage and have been slowly working on the sheet metal and rims for about 5 years, its all finished. but its just like the coil doesnt have enough power to run 3 and 4 as well as they should be, but im too cheap just too go out and buy one too see if its that. A few people have said that it might be a stuck valve after looking at the carbon on the spark plugs of 3 and 4. And I would love to pull out the distbuter and check it all over but I just filled it with oil and wanted to take it to a show in a few weeks to run it for a couple of days stright then change the filter and oil. I did do a full overhaul on the distibuter 5 years ago, and im hoping that i dont have to do it again.

Thanks again for the help Rusty

 

[Ed S.]

Rusty, it's a ten-minute job to pull the front-mount distributor, and no oil is going to leak out (if it does, you have bigger fish to fry than missing ignition). Go pull it and check your point gap on all lobes, plus check to make sure all connections are 'clean, bright and tight.' If the points look okay, swipe a clean dollar bill through the gap to clean up any crud.

Your description of 3 & 4 missing and getting black sure makes me want to say check your spark leads at both ends again...

es

 

[Rustysalmon]

I did it and just like you said easy 10 min job but the gap was good and after running some paper through it they still look clean. Is there any way to check to see if your getting full power out of your plug wires?

Thanks Rusty

 

[souNdguy]

hunting with surge/stall sounds like fuel starvation to me.. I'll bet choke helps it a bit too.

post back.

soundguy

 

[Dell (WA)]

Rusty......you ask....."Is there any way to check to see if your getting full power out of your plug wires?"......shure thing, make one of my calibrated sparkie testers.

Take enny old sparkie and bend the side electrode out for a full 3/16"-gap. Clamp the metal shell to convenient bracket. Plug enny sparkie wire to top of tester. With tractor in neutral, ignition ON; crank yer starter motor while watching yer calibrated sparkie tester. Do the sparkies jump the gap with blue-snott authority? or are they wimp yellowish-orangish poor excuses??? ...or... NO sparkies at all????

You can plug each sparkie wire to the tester and test them all one-atta-time.

FYI, my eazy starting 6-volt 52-8N will jump 3/8"-gap. .......Dell, yer self-appointed sparkie-meister

 

[Rustysalmon]

spark in all plugs

 

[Rustysalmon]

choke is a big help but i can get it to go with out it, after running it for awhile i can get the choke off. but im running too fast and over heating im check the thermosat to make sure its working.

Thanks Rusty

 

[Rustysalmon]

choke is a big help but i can get it to go with out it, after running it for awhile i can get the choke off. but im running too fast and over heating im check the thermosat to make sure its working.

Thanks Rusty

 

[souNdguy]

overheating, and need for choke both point to a lean mix.. lean mixes will cause hunting and surging.. fuel stoppages can cause a lean mix..

see where this trail leads?

soundguy