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Thread: 0-320 widedeck

  1. #1

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    0-320 widedeck

    What was the first year a wide deck 320 was used in a supercub

  2. #2

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    Any ideas

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    S2D's Avatar
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    I think the first wide deck came out in 63 an IO-320 B1A. and the rest were phased in after that. somewhere around 68 sticks in my mind but really don't know.
    I may be wrong but that probably won't stop me from arguing about it.

  4. #4
    RaisedByWolves's Avatar
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    Quote Originally Posted by S2D View Post
    I think the first wide deck came out in 63 an IO-320 B1A. and the rest were phased in after that. somewhere around 68 sticks in my mind but really don't know.
    Mines a 68 and has a wide deck, same S/n engine it left lock haven with


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  5. #5

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    I’m working on an original 66 and it came with a widedeck

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    www.SkupTech.com mike mcs repair's Avatar
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    would the parts book have that info?

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    NDRII's Avatar
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    Mine came out of the factory April ‘66 it still has the original by serial number, it is a wide deck. It’s first overhaul was 2003.

  8. #8

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    There is a 61 here with original and his narrow deck

  9. #9

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    According to sky ranch engineering book lycoming started wide deck engines in 1964 and 1971 for the 540’s
    Thanks Steve Pierce thanked for this post

  10. #10

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    Some time in 66 the first wide deck Super Cubs were built.
    dave

  11. #11

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    Would the b designation on the data plate(ie, -b1a, -b2b etc) confirm it as a wide deck engine, or did lycoming make some high compression 0-320's with narrow deck cases and cylnders?
    ...he was so far behind the airplane, he wasn't even a good witness to the crash
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    i think wide deck engines the (serial number) ends with the letter A.
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  14. #14

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    Quote Originally Posted by tempdoug View Post
    i think wide deck engines the (serial number) ends with the letter A.
    For O-320s, the “A” at the end of the serial
    Number specifies wide deck. You can have either narrow or wide deck engine for most any model. Look at the cylinder old down nuts to tell narrow or wide deck. Narrow deck has internal wrenching nuts. High compression narrow deck engines have the banana plates under the nuts as well. Wide deck engines have normal hex nuts.


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  15. #15

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    FWIW, my brand new IO-390 uses internal wrenching nuts on the cylinders.
    Thanks Dave Calkins thanked for this post
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  16. #16
    skywagon8a's Avatar
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    Quote Originally Posted by stewartb View Post
    FWIW, my brand new IO-390 uses internal wrenching nuts on the cylinders.
    Are they the same as the original internal wrenching nuts or do they require another set of wrenches? Will my old in good condition wrenches work on the new nuts, or is Lycoming wanting to sell me a new set?
    N1PA

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