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Discussion Starter · #1 ·
After discussing this with my wife, I figured this will be fun..

We have a Case-Ingersoll 448, with the original B48M engine. It gets a lot of use, and currently is doing battle with our New England winter.

2 storms ago, my wife noticed the tractor starting to miss. bog, and backfire. I said "Maybe we need a new set of points".

One storm ago I found the situation getting worse, and after clearing the snow, got a set of points and a condensor from the dealer.

Got home (last night), opened box-wrong points. Wrong condensor. Argh. Called dealer-no proper parts in stock, so I cleaned plugs, checked gaps everywhere there was one. And found a source for parts online-they are on the way, points, condensor, and even a coil-I cannot afford to be dow long!

I made it through the storm today, but barely. In fact, I was afraid to get the tractor back to the barn in fear of it blocking our (very long) driveway.

The point of the ramble-my wife said I should google "tractor spits and farts", I said I think I could write the answer-and besides, there's this great forum that just started..

So-ignition?

Thanks for humoring me,

Aaron
 

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Aaron,
I will do no such thing. :sidelaugh: Being a man doesn't make you right but you can tell your wife that I checked the Onan service manual and was unable to find the technical term "spits and farts" anywhere inside.


Diagnosis is a process of elimination. You have chosen one method that is frequently used at dealerships these days. Throw on a whole slew of new parts and see if that cures the problem. Suppose after you do that, you find out that all that was wrong is bad plug wires?

It might also be crap in the carb that is interfering with the engine getting enough fuel. I agree that it sounds like it might be an ignition issue. No harm in doing what you did if you have no idea how old the points and condenser are. As for the coil, you could always swap the old one back once you cure the problem. Might is as well run it until it dies.
 

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I recently went through the exact same thing...turned out to be the old "crap in the carb" problem, and it was very frustrating because I had it apart a few times times before i found religion and cleaned it the right way on the advice of some of the experts here. Do you have an in line fuel filter? if not theres a good chance that there may be some crud clogging one or more of the jets which will definitely cause the symptoms youre having. My 2 cents- if you have the box shaped DD carb (you probably do if its the b48 onan) remove the 4 top screws from the carb and CAREFULLY remove the top of the carb (the float is attached so make sure to hold it in place) and look in the bowl. If you see any particles in there you might want to consider taking apart the carb, doing a full soak in a bucket of carb cleaner, then following up with stranded copper wire and compressed air or spray carb cleaner through the ports. Good Luck. Regards--Guy
 

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Discussion Starter · #5 ·
Be assured I never THROW parts at a problem-I gently install them first. Then throw them if the thing still doesn't start.

I do have a filter on the thing, I will likely give it a "toss" just in case (no pun intended). Funny, I do get that "lean" odor every now and then, but it has done that before-the first time I had a similar issue, 4 years ago. Didn't help, nor did cleaning out the (clean) carburetor, but new points and condensor did.

2 years ago, the engine would die on us during heavy use, I threw on a set of points-no joy. New condensor-ran great until this week.

Sanding points-I actually did that. Could be a coil, too-got one coming. Wires-thought of that, and it is possible. Are the cable ends standard automotive fare?

I'm not a parts swapper-really! I just have to make this thing work Saturday, or shoveling a 1/4 mile driveway is just the start of my penance.
 

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Couple silly questions. Tried new spark plugs? Tried giving main jet little turn out? Does it still have "plastic" float in carb? Tried different brand of fuel? Taking top of carb good idea to be sure water etc not gotten thru. Does little choke help any? Is it worse after used awhile than at first? Bob M
 

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Discussion Starter · #9 ·
robynrj said:
Couple silly questions. Tried new spark plugs? Tried giving main jet little turn out? Does it still have "plastic" float in carb? Tried different brand of fuel? Taking top of carb good idea to be sure water etc not gotten thru. Does little choke help any? Is it worse after used awhile than at first? Bob M
Has new plugs-adding choke when its warm kills it, along with much black smoke. Plenty of fuel.

I doubt it's water, I've managed to get through 2/3 of a tank with no change/gradual worsening, and I can see the fuel "pickup" orifice clearly.

My manly attitude will not allow me to change the carb settings until the entire ignition system has been replaced. I'm just that way...
 

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xfolkboat said:
My manly attitude will not allow me to change the carb settings until the entire ignition system has been replaced. I'm just that way...
:sidelaugh: :sidelaugh: :sidelaugh: :sidelaugh: :sidelaugh: :sidelaugh: :sidelaugh: :sidelaugh: :sidelaugh: :sidelaugh: :sidelaugh: :sidelaugh: :sidelaugh: :sidelaugh: :sidelaugh: :sidelaugh: :sidelaugh: :sidelaugh: :sidelaugh: :sidelaugh: :sidelaugh: :sidelaugh: :sidelaugh: :sidelaugh:
 

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Ah... that's better. You were about to cause me heart palpitations if you confirmed that you ran into counterman that knew anything about coil ignition. :sidelaugh:

You've restored my faith in the "warm body" theory concerning the current requirements for that job and many other similar jobs. Today, all you need to know is how to use a computer and if the item isn't in the computer, then it does not exist anywhere in the world. :trink:
 

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Sounds too familiar... I usually have all the parts no#s I need when I go to the local parts store... They even gave me a few catalogs... But the saying now is Cant get it..
I remember when I was a parts guys.. I did that for 15 years and I always went that extra step for the customer, especially in this farming, logging community... Sometimes you get stumped but if is was made someone has parts for it..
 

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Oh I forgot.... They hire IT guys that they can t even use a countermen because they dont have a clue... My daughters could be counterpersons, with the right information they could find it... but knowing what it is an where it goes and what it does is the other story...
 

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Discussion Starter · #19 ·
But something I didn't know-

I had installed a new set of plugs the last time I changed out the points and condensor, installing the plugs my dealer gave me at the time-Champion H10C.

My shipment from onanparts.com has RH18Y, and apparently that is the correct plug.

Hmm-I knew the plugs looked a bit dark. Not 8 heat ranges dark, though.

I suppose I'll put in the right plugs after the storm tomorrow, too cold and dark now.
 
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