Re: Re: Re: Re: SPARK PROBLEMS Cont.
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Posted by Joe Brown on June 21, 1998 at 10:16:13:
In Reply to: Re: Re: Re: SPARK PROBLEMS Cont. posted by Lee Bradley on June 21, 1998 at 10:06:13:
: : : : 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.
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