Re: Re: Re: Re: Re: Re: Re: Re: Re: SPARK PROBLEMS Cont.
[ View Follow Ups ] [ Post Followup ] [ Return to Tractor Talk ]
Posted by Po Folks on June 21, 1998 at 19:34:24:
In Reply to: Re: Re: Re: Re: Re: Re: Re: Re: SPARK PROBLEMS Cont. posted by farmer on June 21, 1998 at 17:36:38:
: : :
: : : : : : : : : First of all thank you all for the advice. The plugs are all clean. I'm running Champ. D15Y's, this is what the IH dealer gave me. Should I have D21's?? The plug wires all have steel cores. I,ve checked the manifold and gaskets for leaks, all ok as far as I can tell. New carb Zenith, can only change the mixture at idle. I tried Farmers advice. With the engine running "and missing" I put a paper clip at the boot where the plug wire attaches to the plug. #1 throws a 1/2" spark as I move the paper clip away from the top of the plug and there is no change in the engine. Same with #2. When I get to #3 AND #4, as soon as I move the clip away and get the 1/2" jump on the air gap the engine smooths right out. As I move the clip in towords the plug it appears the spark gets MUCH weaker and the engine runs rough again. I really don't think its a mixture problem. For some reason if I don't make the spark jump and air gap on either #3 or #4 it appears that my at leasety to #3 #4 cylinders gets weak. This is a tough one!
: : : : : : : : : PS: Don't worry about the resistor, I never listen to my neighbor anyway!!!
: : : : : : : : How is the compression on 3&4? : : : : : : : : Lee Bradley : : : : : : : Lee,
: : : : : : : I have not checked the compression. I'll admit I'm a begginer. Is this my next step?
: : : : : : I would check the compression on all cylinders. The higher the compression the denser the air/fuel charge and the easier it is to ingnite. If the compression is down on 3&4, I would expect the head gasket is blown between the cylinders. Not a huge problem but some work. : : : : : : Good luck,
: : : : : : Lee
: : : : : I did pull the head when I first got the tractor. I inspected all of the cylinders and valves to see how they were seating. Everything looked great so I replaced the head gasket with a new one and buttoned hear up. I'll go check the torque on the head bolts. I did notice that some of the valve clearences were not to spec. I made an attempt to adjust them but the adjustment seemed tight and I didn't want to break any thing. : : : :
: : : : Joe : Lee has you on the right track with the compression check, any time you have a problem and two cylinders next to each other act up the same be suspicious of the head gasket.
: : : : Good luck.
: : : Lee, I had similar problems with my H's. I found Champion D15y's were the problem. I went to 18's and have had no problem since. You can also go to 21's. Good luck : : I know I should have checked the compression first but I only have time to work on the weekends and the parts store is closed. I took a shot and pulled the head. Gasket looked fine and there was no sign of leakage, valves are seating well. I did notice a little oil on the top of #4. I know it's just speculation but wouldn't I have a bee hive smoker if the rings were bad. No smoke at the stack unless I excellerate quickly, then it goes away. Any thing else I should look for while I have the head off? I hope it is as simple as the type of plugs I'm running. If I had a lake this things close to making a nice fish structure! : Turn it over several times with the crank and watch to see if the valve action is uniform on all cylinders. When it goes back together if you haven't found a problem, try switching plugs and plug wires around to see if the same two cylinders remain the problem. If the plugs are new, try setting the gap smaller. :
:I spent several hundred dollars on a car trying to stop the engine from running rough, before I picked a set of plugs off the shop floor and replaced new Champion's. I will walk before I buy another Champion Plug.
Follow Ups:
Post a Followup
|
