SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                ----------------

                                  SCHEDULE 13G
                                 (RULE 13d-102)

             INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
           TO RULES 13d-1(b) (c) AND (d) AND AMENDMENTS THERETO FILED
                            PURSUANT TO RULE 13d-2(b)
                               (AMENDMENT NO. __)*

                             Gencor Industries, Inc.
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                                (Name of Issuer)

                                  Common Stock
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    368678108
             ------------------------------------------------------
                                 (CUSIP Number)

                                  June 23, 2006
             ------------------------------------------------------
                  (Date of Event which Requires Filing of this
                                   Statement)

     Check the appropriate box to designate the rule pursuant to which this
                               Schedule is filed:
                                [ ] Rule 13d-1(b)
                                [X] Rule 13d-1(c)
                                [ ] Rule 13d-1(d)

                                   Page 1 of 5

                    ----------------------------------------


* The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).


                                  SCHEDULE 13G


CUSIP NO.  368678108                                         PAGE 2 OF 5 PAGES

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 1     NAME OF REPORTING PERSON
       S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
       Lloyd I. Miller, III                                          279-42-7925
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 2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*               (A) [ ]

                                                                       (B) [ ]
--------------------------------------------------------------------------------
 3     SEC USE ONLY

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 4     CITIZENSHIP OR PLACE OF ORGANIZATION

       United States
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                          5    SOLE VOTING POWER

                               25,700
         NUMBER OF       -------------------------------------------------------
          SHARES          6    SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY              417,920
           EACH          -------------------------------------------------------
         REPORTING        7    SOLE DISPOSITIVE POWER
          PERSON
           WITH                25,700
                         -------------------------------------------------------
                          8    SHARED DISPOSITIVE POWER

                               417,920
--------------------------------------------------------------------------------
 9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

       443,620
--------------------------------------------------------------------------------
 10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
                                                                            [ ]

--------------------------------------------------------------------------------
 11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

       5.4%
--------------------------------------------------------------------------------
 12    TYPE OF REPORTING PERSON
      --------------------------------------------------------------------------
         IN-IA-OO**
--------------------------------------------------------------------------------
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

** See Item 4.





                                                                    Page 3 of 5



                                                                          
Item 1(a).    Name of Issuer:                                                   Gencor Industries, Inc.

Item 1(b).    Address of Issuers's Principal Executive Offices:                 5201 North Orange Blossom Trail
                                                                                Orlando, FL 32810

Item 2(a).    Name of Person Filing:                                            Lloyd I. Miller, III

Item 2(b).    Address of Principal Business Office or, if None, Residence:      4550 Gordon Drive, Naples, Florida
                                                                                34102

Item 2(c).    Citizenship:                                                      U.S.A.

Item 2(d).    Title of Class of Securities:                                     Common Stock

Item 2(e).    CUSIP Number:                                                     368678108



Item 3.       IF THIS STATEMENT IS FILED PURSUANT TO RULE 13d-1(b) OR
              13d-2(b) or (c), CHECK WHETHER THE PERSON FILING IS A:

              Not Applicable, this statement is filed pursuant to 13d-1(c)

Item 4.       OWNERSHIP: The reporting person has sole voting and dispositive
              power with respect to 25,700 of the reported securities as (i) the
              custodian to accounts set up under the Florida Uniform Gift to
              Minors Act and (ii) as an individual. The reporting person has
              shared voting and dispositive power with respect to 417,920 of the
              reported securities as an investment advisor to the trustee of a
              certain family trust.

             (a)  443,620

             (b)  5.4%

             (c)   (i) sole voting power:   25,700

                   (ii) shared voting power: 417,920

                   (iii) sole dispositive power: 25,700

                   (iv) shared dispositive power: 417,920

Item 5.       OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS:

              Not Applicable

Item 6.       OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON:

              Other than shares held directly by Lloyd I. Miller, III, persons
              other than Lloyd I. Miller, III have the right to receive or the
              power to direct the receipt of dividends from, or the proceeds
              from the sale of, the reported securities.

Item 7.       IDENTIFICATION  AND  CLASSIFICATION  OF THE SUBSIDIARY  WHICH
              ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING
              COMPANY:

              Not Applicable




                                                                    Page 4 of 5


           

Item 8.       IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP:

              Not Applicable

Item 9.       NOTICE OF DISSOLUTION OF GROUP:

              Not Applicable

Item 10.      CERTIFICATION:

              By signing below I certify that, to the best of my knowledge and
              belief, the securities referred to above were not acquired and are
              not held for the purpose of or with the effect of changing or
              influencing the control of the issuer of the securities and were
              not acquired and are not held in connection with or as a
              participant in any transaction having that purpose or effect.






                                                                    Page 5 of 5

                                    SIGNATURE


     After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.





Dated: July 19, 2006                              /s/ Lloyd  I.   Miller, III
                                                  -----------------------------
                                                        Lloyd I. Miller, III