No spark

Here are a few pointers from a former pressure pump tech. Usually no spark is caused by the low oil safety system or spark plug wire shorted. This system will prevent the engine from starting if the oil is dirty or contaminated with gas. Try disconnecting the oil sensor and the kill wire from the coil. If no joy re-install the old coil and test without oil sensor connected. The spark coil can be tested with a growler used to test armatures. Sometimes a shorting sparkplug wire can be found by pulling the starter rope in a dark room and look for sparks jumping to metal. enjoy