Allis has a plug habit like eatting chocolate.

[Alleyyooper]

My 1961 D17 gasser is going thru spark plugs like wild fire. Just started a bit ago for some reason. Yes they are book recommended types of a couple different brands. Could the coil be getting weak and not fireing the spark hot enough for the plugs?

[Argee]

My 1961 D17 gasser is going thru spark plugs like wild fire. Just started a bit ago for some reason. Yes they are book recommended types of a couple different brands. Could the coil be getting weak and not fireing the spark hot enough for the plugs?
That's what I was thinking...maybe bad wires??

[sonny]

Also check the points for gap & clean the surface occasionaly, next is the cap condition, then the wires, as was said coil can get weak. Might have to go to a hotter or colder plug ,depending on whether its fouling with oil or burning them up. If oil is the problem, go hotter plug #. there are also plugs for high oil consuption motors, but I dont have any experence with them. thanks; sonny

[bear]

whats maintenabce history like when was the last time points and condenser were changed would be a cheap and easy place to start while your in there cap and rotor and wires isn't a lot more

[Ingersoll444]

Lots of reasons what could be the problem. Motor getting tired, a little blowby, weak wires/points. I would try jumping up a heat range. Todays gas burns a little diferent then the gas did back in the day, so you normaly have to change the heat range a little. Also these motors were built to work the feilds, day in, day out. If this tractor has an easy life now, that could be it also. I bet a good tune up, and a hotter plug will fix you up.

[jdkubotamurray]

When you say going through, are they burning up or just getting fowled. Burning up and damaged could be premature detonation (pinging) which can be timing related.

[Alleyyooper]

Tune up was did last spring, points condenser and plugs. Tractor has an easy life just use it for loader work. Plugs are wet fowled, and smell gassy not oily. Have tried a couple heat ranges as the IT book list plugs for a lazy tractor and one that works it's heart out. Also have tried different brands.
I did most of the fill around the new honey house with a ROF Mexican drag line since Allis was so balky.
Guess I'll start from scratch again and do another point, condenser, cap rotor and plug wire replace with the new plugs.
Thanks for the thoughts.

[sonny]

Check the carb before you do anything else!! Wet plugs are a fuel not ign. problem! thanks; sonny

[Alleyyooper]

I knew when I signed out that I had forgot to mention I did do a carb rebuild already and some one would point to that. Tractor doesn't smoke black smoke either like a over rich condtion. Runs fine for an hour or so then starts back fireing then quits running on one cylinder then even more start miss fireing if I have far to go before parking it.
Going to trade it for a Massey ROF if it keeps acting up like that.

[sonny]

When it dies out, is the coil hot? I mean HOT-HOT. If coil or condenser heat up and start breaking down, it would run about that long.
Start it and pull a plug wire off and "jump" the spark to the plug. Is it long and blue? short and yellow, or white? is it an invisible spark? (yes there is such thing) Now move the wire over and jump to block. any dif. color or length? Don't know if AC uses an external resistor or not, as I don't have specs. on D-series tractors. also dont use resistor type plug wires. Use only the real wire type.
Now run it until it dies out again and pull the wires off, one at a time and check spark again for color, and length! This should get you a better picture of where the problem is. Hope these ideas will help you. thanks; sonny

[Alleyyooper]

Sorry for taking so long to post again. Been busy here getting things lined up for spring. Have Ten new queens on order five New World & five SMR Carnoloins. Still looking for a northern supplyer of Itialian queens and we also want some Itialian five frame nukes. Closeest we have found so far is New York. I am afraid Allis is on hold for even longer as we are going to Minnesota soon to baby sit the grand children ROF A job I am not looking forward to YA RIGHT.

[BigorangeDan]

try sending the allis to rehab if theat dont work than try putting it down

or you could try some bosch plantum 6 point heavy duty plugs (only about 60$ each but well worth it) :goodl: ROF :trink39:

[Maybar]

I don't see any mention of the air filter being serviced. If dirty enough causing too much negative pressure it can act as if being slightly choked .

[souNdguy]

Got metal core wires? Hows the spark look/

soundguy

[LEOLAV]

Also consider the brand of spark plugs. When I was with Autolite, we used to always hear people complaining about other brands of plugs failing and they would switch to a different brand and the problem miraculously disappears. Used to be a frequent issue with Champions because of their loose heat ranges,

[Alleyyooper]

Well the bees are put to bed for the winter so I have time to fiddle with a balky Allis. The first plugs I put in that puked were RN12YC. Fire from the plug wires were blue and jumped right out so I am sure it isn't the wires or coil now. After they sat a day they fired up again till it got Warmed up good.
Went to buy the second suggested plug the book list, (can't remember the number) Dealer was out and said the cross referance was N8's which he had. They only ran about 10 hours and puked and won't fire despite the good spark off the wires.
I just finished a search and found a listing for N11YC champions way hotter than N8's, and BP5ES NGK's

So what do you run in your D17?

[Maybar]

Try closing the plug gap to .020 - .022

[jdkubotamurray]

try sending the allis to rehab if theat dont work than try putting it down

or you could try some bosch plantum 6 point heavy duty plugs (only about 60$ each but well worth it) :goodl: ROF :trink39:
Holy $41T! $60 per plug?! :fing20: