If you are getting a click, that tells me there is power to the bendix (solenoid). That is coming from the ignition. From there, the bendix energizes the starter itself that already has 12 volts direct from the battery. Are you certain that the power supply from the battery is clean, tight, and the battery cable is in good condition? Also, is the ground from the battery to the engine clean and tight?
Please bear with me. Not being there makes it difficult. I understand that you have already replaced the starter and it most likely isn't the problem. However, based on the description of the problem, it sounds exactly like it. Do this. When it only clicks, have a helper turn the key to the start position while you check for voltage to the smaller wire on the starter. Let me know how many volts you get. Also, let me know if you need any wiring schematics that may help you.
Saturday, October 1st, 2011 AT 4:40 AM