New Info on hard starting motor

1). With key off or on voltage at the starter is 6.2v

2). Cranking voltage with key off or on is the same 5.7v when motor spinning freely and 4.7 when motor seems to be under hi compression. (Still making a couple of turns then seems to hit a high compression and then starts spinning freely again).

3). Remove all spark plugs and motor spins over with good speed. Voltage at starter is 5.8v.

4). Motor continues to spin over good until the third spark plug is re-installed. Does not matter what cylinder is the third spark plug.

5). No difference in the way the motor spins over with key off or on.

Any more ideas or things to check. Right now I am going to get the starter checked Monday at the local starter rebuilder.


Chuck,

'51 5 Window 3104
'47 Chevy Fleetmaster