A considerable amount of blowby is normal on those engines... You don't pay it much attention until there's a problem and then you tend to think it's a lot...... What I would do is get a pair of injector bars and pop #2 and #3 injectors out and switch them. Then start the engine and see if the problem follows the injector. It could simply be that you have a bad nozzle on #3 injector and the racket you hear is a fuel knock because of that.... If the problem follows the injector, rebuil/replace the injector. If the problem remains on #3 cylinder... you can either do a compression test or open her up for an assessment.
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Today's Featured Article - Timing Your Magneto Ignition Tractor - by Chris Pratt. If you have done major engine work or restored your tractor, chances are you removed the magneto and spark plug wires and eventually reached the point where you had to put it all back together and make it run. On our first cosmetic restoration, not having a manual, we carefully marked the wires, taped the magneto in the position it came off, and were careful not to turn the engine over while we had these components off. We thought we could get by with this since the engine ran perfectly and would not need any internal work. After the cleanup and painting was done, we began reassembly and finally came to t
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