Originally Posted by scallywag
Did wire trick from battery
to solenoid. Starter spins. Does not engage the flywheel. I think it is the wrong pinion gear. What gear does it take?
Since I am not actually there checking things out, it makes trouble shooting a lot more of a guessing exercise. I did pull up a picture of this starter on ebay and noted that the pinion gear is small. This is usually how a starter is designed, to get the most gear reduction possible. It would not be possible to get this pinion gear any smaller so I deduce that this is the correct setup unless you have something out of the ordinary.
Here is an idea. Take the starer off, Take it to a starter testing station (the one at the place the starter was rebuilt?) and hook up battery wire to starter solenoid and jumper across from battery to smaller terminal that goes to starter button or 'ignition' key and see if the gear is forced into position that would normally be in to engage the ring gear on the flywheel. The starter will also spin up so it is best to have the starter properly secured as it can jump pretty bad when engaged. If the pinion gear moves into position, then we know the linkage inside the starter and solenoid is connected correctly.
Another thing that could be going on is a used pinion or maybe a defective one was used. What you have is an electric motor
(the starter) that has a clutch
in it that transmits torque in one direction but not the other. What this does is prevent the starter from being driven so fast when an engine catches, but the starter button is not released, that the windings in the electric motor
are thrown out of place from the very high speed because there is a very large gear on the engine fly wheel
and a very small gear on the starter pinion and it can really spin up. The one way clutch allows the starter to turn over the engine, but the engine cannot turn the starter. When a one way clutch fails, what it does is not transmit torque from the starter to the engine. The clutch slips when it should connect the starter motor
with the pinion gear. So I am thinking either the linkage from starter solenoid is not connected to the to move the pinion gear connecting with the ring gear, or the one way clutch does not transmit torque to the pinion gear that has properly engaged with the ring gear. I have seen the situation where the wrong pinion gear was on a starter and the clashing of gears is frightful. That happened to be on an aircraft engine. I wasn't on any job that I did and I was thankful for that because it could have been expensive if the ring gear was damaged.