28-04-2023, 06:19 PM
Think I might be losing it........
Have put the test rig together as you can see by pics on the attached Word document.
Have not had a chance to run the engine as I simply cannot get the starter motor to turn the engine over, now she is out of the car. The starter motor will fire the nut forward to engage the ring gear but stops dead, occasionally it will turn the engine half a turn but that's as good as it gets. Have never had a problem like this with the engine in the car.
Initially I thought it was bad connections using jump leads and clamps, as noted in earlier comments. But after many attempts and abject failure, I have now converted an old set of jump leads to fully bolted connections from the battery terminals to both the starter motor and the engine block on the test rig.
I have subsequently taken the starter motor off and spun her in a vice on the battery and to begin with the nut was sticking in the spring but after a series of adjustments, all seemed to working ok. But once installed there was no change to its performance.
I have checked the starter switch motor and it was as clean as a whistle, bright copper surfaces, no corrosion. There is an indentation at the furthest end of the lower portion of the contacts so it obviously only making contact at that one area
.
The battery was new February '22, but I took it back to the supplier this afternoon and the guy was kind enough to test it for me, including the acid, and confirmed it is as new and fully charged.
Just to make sure I am not missing something or screwing it up.........
I have a taken a bolted connection from the negative battery terminal via heavy copper cable and attached this to the nut at the top of the starter motor and this is bolted tight.
I have the run a similar bolted cable from the the positive battery terminal to an extended stud on the head of the engine where the normal earth connection to the engine would be. This has also been boosted with an additional clamped cable from the positive terminal to the nut at the back of the starter motor.
I have a wire from the negative feed to a simple kill switch and then on the other side of the switch to the negative terminal on a new spare coil I have.
A separate wire goes then from the positive side of the coil to the side of the distributor.
The coil is then fed to the distributor and the plugs as normal.
These are the only electrical connections I have.
I will have a small supply of fuel which will be picked up by the fuel pump via a new pipe which can be seen as fitted.
So not sure if I have a starter motor issue, a wiring issue, or.........
Have put the test rig together as you can see by pics on the attached Word document.
Have not had a chance to run the engine as I simply cannot get the starter motor to turn the engine over, now she is out of the car. The starter motor will fire the nut forward to engage the ring gear but stops dead, occasionally it will turn the engine half a turn but that's as good as it gets. Have never had a problem like this with the engine in the car.
Initially I thought it was bad connections using jump leads and clamps, as noted in earlier comments. But after many attempts and abject failure, I have now converted an old set of jump leads to fully bolted connections from the battery terminals to both the starter motor and the engine block on the test rig.
I have subsequently taken the starter motor off and spun her in a vice on the battery and to begin with the nut was sticking in the spring but after a series of adjustments, all seemed to working ok. But once installed there was no change to its performance.
I have checked the starter switch motor and it was as clean as a whistle, bright copper surfaces, no corrosion. There is an indentation at the furthest end of the lower portion of the contacts so it obviously only making contact at that one area
.
The battery was new February '22, but I took it back to the supplier this afternoon and the guy was kind enough to test it for me, including the acid, and confirmed it is as new and fully charged.
Just to make sure I am not missing something or screwing it up.........
I have a taken a bolted connection from the negative battery terminal via heavy copper cable and attached this to the nut at the top of the starter motor and this is bolted tight.
I have the run a similar bolted cable from the the positive battery terminal to an extended stud on the head of the engine where the normal earth connection to the engine would be. This has also been boosted with an additional clamped cable from the positive terminal to the nut at the back of the starter motor.
I have a wire from the negative feed to a simple kill switch and then on the other side of the switch to the negative terminal on a new spare coil I have.
A separate wire goes then from the positive side of the coil to the side of the distributor.
The coil is then fed to the distributor and the plugs as normal.
These are the only electrical connections I have.
I will have a small supply of fuel which will be picked up by the fuel pump via a new pipe which can be seen as fitted.
So not sure if I have a starter motor issue, a wiring issue, or.........