Triumph Repair: Starter, voltage drop test, torque starters

Question
QUESTION: What causes the starter to drop out after several revolutions trying to start. The starter has been recently replaced and I just replaced the solenoid. Do the hi torque starters get rid of this problem?

ANSWER: Hi Stan,
That is not normal for any kind of starter. You need to test the amount of voltage drop at the battery when trying to spin the starter. Then do "Voltage Drop" tests of the (+) and the (-) cables while trying to spin the starter. If you are not familiar with "Voltage Drop" tests let me know and I will outline it for you.
Howard

---------- FOLLOW-UP ----------

QUESTION: Well, I did the voltage drop test and the only thing that passed was the battery voltage staying at 11 volt during cranking. I replaced all the cables on the ground and positive side. (total of three) ....Although the car car cranks faster and with a healthier sound, the starter still drops out after a few revolutions. Any other suggestions?
Stan

Answer
Stan, if the starter stops spinning the engine after a few revolutions you need to have a test light or volt meter on the starter solenoid at the time it stops working to know if it has stopped receiving power to the "trigger" wire on the solenoid. If it does stop then you need to move the test light up to the starter switch. If the power is still at the solenoid, then you need to move the test light to the large post on the solenoid that connects to the starter motor itself to see if the solenoid has failed to continue to connect the battery power to the starter motor. It is no use replacing parts until you find out which part has failed. Replacing parts to locate a problem will usually make your bank account run dry before you find the cause.
Howard