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I have read and have removed and replaced a starter motor on a BX1500 Kubota.
It is a nightmare because of room spacing.
I know now that the contacts on my solenoid are not making good contact when I try to start.
Without trying to remove the starter again. Here is what I am thinking of doing.
Buying a three terminal starter relay. connecting the B+ from the starter motor to the B+ on the new relay.
Then connecting the other side of this relay to the starter motor. Effectively by passing the contacts in the solenoid.
I will make a parallel connection to both the new solenoid and the old solenoid. This will engergize the plunger to the fly wheel. and at the same time close the new solenoid contacts.
When the motor starts, pinon falls back 5 volts to solenoids (because the starter switch is disengaged) is broken and the motor starts.
What do you think.

As far as I know you can't do this as the current starter as it is a solenoid shift starter. The solenoid not only engages the starter motor it also moves the starter Bendix into the flywheel ring gear.

Now if you can mount a non solenoid shifter starter then you can and would need to add the remote solenoid (relay).

Here is my concern.
When the engine starts the pinion leaves the fly wheel. does the pinion disconnect the solenoid voltage or does turning the spring loaded key switch make the pinon pull back and thereby disconnecting the current to the starter motor.

Your keyswitch provider voltage to solenoid trigger wire. As solenoid retracts it both moves the starter Bendix up into the flywheel ring gear and also makes a contact plate across the two main terminals internally to activate the starter itself. When when you release the keyswitch the voltage to solenoid is no longer present and solenoid release the Bendix and move the contact plate away from the two main terminals deactivating the starter motor.

StarTech said:

Your keyswitch provider voltage to solenoid trigger wire. As solenoid retracts it both moves the starter Bendix up into the flywheel ring gear and also makes a contact plate across the two main terminals internally to activate the starter itself. When when you release the keyswitch the voltage to solenoid is no longer present and solenoid release the Bendix and move the contact plate away from the two main terminals deactivating the starter motor.

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Excellent,
then what I am going to do, will work.
All this because it is so difficult to remove the starter and solenoid from the Bx1500.. Clearances are almost impossible without removing a lot of parts.

Just some of the Gravely ZTRs where the engine has to pulled just to get to remote starter solenoid.