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TOPIC: Power for a Thompson Speed Demon

Power for a Thompson Speed Demon 11 months 3 weeks ago #130033

  • Terrydi
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Hey All,

Working with a buddy to select a correct motor for this 1952-53 11’ Thompson Speed Demon.



He is a Johnson guy but got him convinced to go Merc. I found a 1955 Mark 20 but I think he will need a short shaft.



Any ideas or suggestions would be appreciated.

Thanks,
Terry
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Re:Power for a Thompson Speed Demon 11 months 3 weeks ago #130034

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www.liquidassetsonline.org , 63\'PowerCat14-C w/twin64\'650\'s,14\'Glen-L Zip w/Mark58E,58\'TeeNee,
Mark55AE,Mark55E,PairMark58E\\\'s,Mark58AE,Mark78AEL, 6-7RBM\'s.Keep EM\' Alive! Always looking to add to collection.

Re:Power for a Thompson Speed Demon 11 months 3 weeks ago #130035

I would say a mark30H or mark 55H. mark 20H may be small. That is a racing bo
at. the block was added for a short shaft service motor. 10ft was a B classMark 20H
11ft would be a C class. Mark 30H

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