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Starter question
https://www.ausmini.com/forums/viewtopic.php?f=2&t=88443		 Page 1 of 1
Author:  Phil 850 [ Mon Jan 26, 2015 7:41 pm ]
Post subject:  Starter question
What is the difference between a Pre Engaged starter and Non Pre Engaged starter.
How do I tell what I have currently and what are the benefits of one over the other.

Sorry to be a pain but I just don't know ?
Author:  drmini in aust [ Mon Jan 26, 2015 9:50 pm ]
Post subject:  Re: Starter question
If starter is round it's a bendix drive.
If it has a solenoid box attached with wires on it, it is pre-engaged.
Like this one-

Image
Author:  Phil 850 [ Tue Jan 27, 2015 5:19 pm ]
Post subject:  Re: Starter question
No solenoid.
Just a big fat round Lucas starter with the +ive cable attached to the end of it.
I have a push button floor starter switch.
Author:  peterb [ Wed Jan 28, 2015 7:09 am ]
Post subject:  Re: Starter question
preingaged tend not to chew ring gears as much.
Author:  drmini in aust [ Wed Jan 28, 2015 7:17 am ]
Post subject:  Re: Starter question
peterb wrote:
preingaged tend not to chew ring gears as much.

If you fit a pre-engaged one (Gemini, etc) they mesh in from the front (ie engine side), will work fine even if the existing ring gear is looking second hand.
Also, if the engine gives a few isolated kicks when being cranked, it won't throw the pinion out of mesh like the old Lucas does.
Author:  Phil 850 [ Wed Jan 28, 2015 4:42 pm ]
Post subject:  Re: Starter question
So if it is Pre-engaged, what does that actually mean ?
Author:  mini0998 [ Wed Jan 28, 2015 5:01 pm ]
Post subject:  Re: Starter question
Pre-engaged means the gear on the starter motor is in mesh with the flywheel ring gear before the starter motor starts to spin.

A bendix starter motor is already spinning as it is engaging with the ring gear on the flywheel.
Author:  Phil 850 [ Wed Jan 28, 2015 6:02 pm ]
Post subject:  Re: Starter question
Thanks mini0998
So what pushes the pinion out into mesh with the ring gear. I presume then that contacts are made that then starts the starter motor rotating.
Sorry to be a pest but I just like to understand these things. Helps to then diagnose problems when you have one.
Author:  mini0998 [ Wed Jan 28, 2015 6:45 pm ]
Post subject:  Re: Starter question
In basic terms the solenoid on top of the starter, once engergised, pushes the starter gear out via an arm, into the ring gear of the flywheel. Once that happens the starter then spins.
Author:  drmini in aust [ Wed Jan 28, 2015 6:45 pm ]
Post subject:  Re: Starter question
With a standard bendix drive Lucas starter the inertia of the starter throws the pinion into mesh, a spring inside the pinion helps return it when you release the key or button.
A pre-engaged starter has a solenoid (sort of electro/mechanical relay) which firstly engages the pinion into the ring gear, THEN spins the starter motor. When you release the key it de-energises the starter motor and retracts the pinion out of mesh.
They cost more, which is why cheapo British cars like Morris, Austin, Ford and Hillman got the old standard Lucas.

Hell, even the old Fiat Nuova 500 back in the early 60s has a pre-engaged starter. Was mechanically actuated, no solenoid to save $$. :)
Author:  Phil 850 [ Wed Jan 28, 2015 9:17 pm ]
Post subject:  Re: Starter question
So my old Lucas (which has no solenoid on it) is an inertia starter motor.
Author:  drmini in aust [ Wed Jan 28, 2015 9:57 pm ]
Post subject:  Re: Starter question
Yes.
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