Of these two Delco engine starters, which one is more powerful or are they the same?

[sdowney717]

Both marine starters. Same rotation.
Black one off a MerCruiser 260 inboard 1980's
Blue one from an IH 392 1970

I rebuilt the black one as a backup
The blue one got wet and needs to be cleaned up inside to work again.
They have a different shape on the housing for the armature.

New item by Scott Downey

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[sdowney717]

It is a 10MT starter design

Well according to here , the blue is low torque, the black high torque.
Anyone concur? How much higher torque?

Ray's Chevy Restoration Site -- Chevy Starter Info

Information about Delco-Remy 10MT starters used on 1956 to 90's Chevrolet engines.

rmcavoy.freeshell.org

The regular "low torque" version of the 10MT motor has the solenoid screwed directly to the metal strap leading inside the starter motor. An example of this type of starter is shown on the left in the above photo.

The "high torque" version of the 10MT motor has a spacer bushing and a long screw to connecting the solenoid to the metal strap leading inside the motor. An example of this type of starter is shown on the right in the above photo.

Note: Some rebuilt starters may have the shorter "low torque" field coils inside a "high torque" field frame (housing). Removing the end cover to examine the field coils is the only way to be sure a starter is truly a "high torque" version.

 

[Scott Danforth]

a newer (and significantly lighter) PMGR (Permanent Magnet Gear Reduction) starter will be about 2-3 times as powerful as any of the old direct drive.

why not use a much better and lighter starter?

 

[sdowney717]

a newer (and significantly lighter) PMGR (Permanent Magnet Gear Reduction) starter will be about 2-3 times as powerful as any of the old direct drive.

why not use a much better and lighter starter?

Of course I agree, except why spend the money, as in extra couple hundred, if I got a working one?

Black starter came from a friends boat. I replaced it for him, and he let me have the old starter, which needed new brushes. And brushes were cheap so a year ago, I repaired for a backup.

 

[Lou C]

The faster lighter PMGR starters also draw less current much easier on your batteries….

 

[sdowney717]

I know that, the old blue starter has worked fine for couple decades.
I cleaned up the black starter and am painting with some bright colored paint I have here. This is a dual engine boat.
It mounts under the exhaust manifold, meaning it has to be removed to remove starter.
And the battery box too as it gets in the way. Since these are fresh water cooled, had to drain the manifold coolant. I found a good way to easily collect coolant, use a wet vac, remove 1/8 drain plug, and suck it straight into the vacuum as it drains. no mess.

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[sdowney717]

It definitely IS a high torque starter now. It cranks that motor much faster.
I noticed immediately first crank
Makes me want the same high torque for the other port engine. I always thought these engines lacked cranking speed when starting.