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Oliver 1600 gas. Won't start unless I tow it about 200 feet. After it starts, it runs good. Doesn't miss, or smoke. But it won't start on it's own when it's cold. Rolls over, but won't fire. I had the carb redone at a tractor dealership. I have good blue spark at the points and spark plugs. New coil. Points set at .020. Fresh gas, runs freely out the line at the carb. I have the air hose off, so it gets all the air it needs. The choke closes completely.I took the manifold off and took it to a automotive repair, where they planed it smooth, then I put on new intake gaskets. When it's running, I put my hand over the breather port of the carb, and there is good suction. The engine will die. Any ideas?????
 
I would take a close look at the starter. Maybe have it checked out. Possibly its not spinning it over fast enough. Weak batteries maybe. Sounds like everything else checks ok.
 
I had the same prpblem, til my brother looked at it and asked who set the points. I told him I did it, and he have me "The Look", took a screw driver and set them correctly. I had them about 1/4" open, and I was sure they were set correctly. Turns out I don't know how to do it. Fired immediately, and has ever since.
 
If the starter is dragging even just a little or isn't getting all the power it should it could be preventing the ignition system from getting enopugh juice to fire while cranking.

But if it's taking 200 feet to make it fire I supect compression (make sure you do both wet and dry reasings) ot fuel flow. Once it starts running you say it runs well so I would think that fuel folw is OK.

Rick
 
I would put a new set of plugs in it and then try to pull start it before crank starting it.
leave the choke in for the first 50 feet, then pull it out some until it fires. Some plugs get a weird coating that conducts when cold. Over choking can assist in its forming. If the tractor starts immediately this way try it with the starter.
Fresh gasoline is a must. if it is least summers fuel, run it in your car or other engine. Jim
 
Measure your battery voltage during cranking to see how far it drops. The starter may be dropping the voltage too much to your igniion.
When you pull start it you're not dropping the voltage. Hal
PS: Make sure you have good battery cables and if they're cracked replace them and don't make them any longer than necessary and use soldered lugs. Clean all connections until shiny and that includes where your battery is grounded.
 
Don't think it would be the starter if it takes 200 feet of towing to start. We had an old Chev pickup when I was a kid that acted the same way. Turned out the valves were way out of adjustment (too tight, I think).

Janicholson's idea sounds plausible, too. That would explain the long distance pull.
 
Agree! Fought starting issues on our 4320 for two years. New starter, new batteries, new cables. Finally relocated ground wire on starter bolt and no problems since. Starters and battery voltage is critical.
 
Good suction at the carb as felt by your hand might not be enough to make it start at cranking speed. It's like judging horsepower by the seat of your pants. If it isn't drawing enough air through the carb venturi at cranking speed it just won't get enough fuel mixture to run. I'd check the valve setting as was mentioned before. If the valves aren't closing all the way, even by a whisker, it won't have enough vacuum at cranking speed. I pulled my hair out working on that VAC Case last summer trying to get it to run but I finally gave up because the compression and efficiency of the pistons was so low it just couldn't get the right fuel-air ratio sucked out of the carb and into the combustion chambers at cranking speed. When we pull started it the engine spun over fast enough to create enough draw throug the carb to get things in motion. The valve setting was OK but the engine was just plain worn out. Jim
 
(quoted from post at 09:09:49 02/18/12) Good suction at the carb as felt by your hand might not be enough to make it start at cranking speed. It's like judging horsepower by the seat of your pants. If it isn't drawing enough air through the carb venturi at cranking speed it just won't get enough fuel mixture to run. I'd check the valve setting as was mentioned before. If the valves aren't closing all the way, even by a whisker, it won't have enough vacuum at cranking speed. I pulled my hair out working on that VAC Case last summer trying to get it to run but I finally gave up because the compression and efficiency of the pistons was so low it just couldn't get the right fuel-air ratio sucked out of the carb and into the combustion chambers at cranking speed. When we pull started it the engine spun over fast enough to create enough draw throug the carb to get things in motion. The valve setting was OK but the engine was just plain worn out. Jim
Click to expand...

BINGO!!! We have a winner.
 
Oh, by the way, please post back and educate us when you find the problem. Sounds like the rest of us are pulling at straws too! Jim
 
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