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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0000950123-07-001418.txt : 20070206
<SEC-HEADER>0000950123-07-001418.hdr.sgml : 20070206
<ACCEPTANCE-DATETIME>20070206161200
ACCESSION NUMBER:		0000950123-07-001418
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20070206
DATE AS OF CHANGE:		20070206

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			GENCOR INDUSTRIES INC
		CENTRAL INDEX KEY:			0000064472
		STANDARD INDUSTRIAL CLASSIFICATION:	CONSTRUCTION MACHINERY & EQUIP [3531]
		IRS NUMBER:				590933147
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0930

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-34225
		FILM NUMBER:		07584636

	BUSINESS ADDRESS:	
		STREET 1:		5201 N ORANGE BLOSSOM TRAIL
		CITY:			ORLANDO
		STATE:			FL
		ZIP:			32810
		BUSINESS PHONE:		4072906000

	MAIL ADDRESS:	
		STREET 1:		5201 N ORANGE BLOSSOM
		CITY:			ORANLANDO
		STATE:			FL
		ZIP:			32810

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MECHTRON INTERNATIONAL CORP
		DATE OF NAME CHANGE:	19880128

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MECHTRON GENCO CORP
		DATE OF NAME CHANGE:	19720411

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MECHTRON CORP
		DATE OF NAME CHANGE:	19690909

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MILLER LLOYD I III
		CENTRAL INDEX KEY:			0000949119

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		4650 GORDON DRIVE
		CITY:			NAPLES
		STATE:			FL
		ZIP:			33940
		BUSINESS PHONE:		9412628577
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>y29906esc13gza.txt
<DESCRIPTION>AMENDMENT #1 TO SCHEDULE 13G
<TEXT>
<PAGE>

                       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. 1)*

                             Gencor Industries, Inc.
                                (Name of Issuer)

                                  Common Stock
                         (Title of Class of Securities)

                                    368678108
                                 (CUSIP Number)

                                December 31, 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).

<PAGE>

                                  SCHEDULE 13G

CUSIP NO. 368678108                                            PAGE 2 OF 5 PAGES


- --------------------------------------------------------------------------------
1    NAME OF REPORTING PERSON
     S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

     Lloyd I. Miller, III               ###-##-####
- --------------------------------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

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

- --------------------------------------------------------------------------------
4    CITIZENSHIP OR PLACE OF ORGANIZATION

     United States
- --------------------------------------------------------------------------------
               5    SOLE VOTING POWER

                    9,000
  NUMBER OF    -----------------------------------------------------------------
   SHARES      6    SHARED VOTING POWER
BENEFICIALLY
  OWNED BY          672,221
    EACH       -----------------------------------------------------------------
  REPORTING    7    SOLE DISPOSITIVE POWER
   PERSON
    WITH            9,000
               -----------------------------------------------------------------
               8    SHARED DISPOSITIVE POWER

                    672,221
- --------------------------------------------------------------------------------
9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     681,221
- --------------------------------------------------------------------------------
10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

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

     8.2%
- --------------------------------------------------------------------------------
12   TYPE OF REPORTING PERSON

     IN-IA-OO**
- --------------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

**   See Item 4.

<PAGE>

                                                                     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 9,000 of the reported securities as (i) a manager of a
     limited liability company that is the general partner of a certain limited
     partnership and (ii) an individual. The reporting person has shared voting
     and dispositive power with respect to 672,221 of the reported securities as
     an investment advisor to the trustee of certain family trusts.

     (a)  681,221

     (b)  8.2%

     (c)  (i) sole voting power: 9,000

          (ii) shared voting power: 672,221

          (iii) sole dispositive power: 9,000

          (iv) shared dispositive power: 672,221

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>

                                                                     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>

                                                                     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: February 6, 2007                 /s/ Lloyd I. Miller, III
                                        ----------------------------------------
                                        Lloyd I. Miller, III
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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