Posted by Deutz Lover on October 18, 2017 at 20:01:31 from (174.218.129.213):
In Reply to: engine runs rough posted by olyellow816 on October 17, 2017 at 19:04:29:
Okay, now we have a starting point.
1. Before starting the tractor check the radiator level and the oil level. Make sure the oil is not milky.
2. Start the tractor. When it starts running badly stop the engine feel the ignition coil to see if it is hot. It could be opening up or shorting out. Had a Jag once with a Lucas coil that would intermittently short. Drove me crazy isolating it.
3. Make sure the rotor brass flat spring is contacting the corresponding button inside the distributor cap. Also check that the rotor arm brass arm is almost touching the projecting studs inside the cap. If there is too much clearance this can cause the problem.
4. Make sure that the new capacitor is also not faulty. Within the last 1-1/2 year I have seen a Jubilee cut up like you describe. The points, plugs and capacitor had been replaced. Turns out two replacement capacitors were bad. Some of these aftermarket sources suck.
5.Replace the Champion spark plugs with NGK plugs. I have had brand new bad ones. I know it is presumptuous of me to assume you have Champions.
6. Make sure the high tension lead from the coil is not bad. Check it with a volt meter. One quick check of your ignition is to crank it at night and run it in pitch black. If it is shorting it will look like a Christmas tree.
Just in case it is you fuel system open the bowl drain plug on your new carburetor and catch the fuel in a container making sure you get a good flow of gas. Naturally disconnect the battery before you do this. You might have a line stoppage or even a problem with fuel cap not venting. This can be really evident if there is a sudden drop in atmospheric pressure such as a passing heavy shower.
That is all I have for now. Everyone else will chime in with their suggestions.
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