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Mackpro

Ac Engine Pics And Info

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I'm new to the older Macks and would like some info and pics of the AC model engine, were they gas engines? 4or 6 cyl? were they made by Mack? Any info would be great! Thanks

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I have a '22 MACK AC.

The Engines are 50 hp, 4 cylinder, Gas engines with a magneto ignition system. They were produced by International Motors - who took on the MACK name in the mid 20'. The Cylinders are cast in pairs and have a Bore of 5" with a stroke of 6".

In the front view the left of the picture is the water pump and the right is the mag. This one is hand cranked, but has a small generator on it.

The side view shows the 2 double cylinder castings sitting on the aluminum block.

I don't have this one running just yet, but will soon.

Hopefully the pictures loaded correctly.

PDG X

1922 MACK AC

1917 Ford TT w/ Holmes 285 Wrecker

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Cool, thanks for the pics and info, hope you get it running, would you have to make your own parts?, we still have some gas powered Mack fire trucks running around here. We have a Mack bus with a gas engine in it, I wish I had time to pull the motor and mess . A tree fell on the bus and smashed it, it was already rusted out, the only thing left is the motor. Heres some pics

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Any idea what year that engine came from ?

PDG X

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Any idea what year that engine came from ?

PDG X

I think it was from the mid 50's. We used to have the serial# somewhere . When it get cold enough for the snakes to go unger ground I'll go out and gets some more info on it. Where did you get that AC?

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I picked it up in So California, just east of LA, last April

PDG X

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