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<SEC-DOCUMENT>0000950123-08-005435.txt : 20080509
<SEC-HEADER>0000950123-08-005435.hdr.sgml : 20080509
<ACCEPTANCE-DATETIME>20080509160805
ACCESSION NUMBER:		0000950123-08-005435
CONFORMED SUBMISSION TYPE:	SC 13D/A
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20080509
DATE AS OF CHANGE:		20080509

FILED BY:		

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

	FILING VALUES:
		FORM TYPE:		SC 13D/A

	BUSINESS ADDRESS:	
		STREET 1:		4650 GORDON DRIVE
		CITY:			NAPLES
		STATE:			FL
		ZIP:			33940
		BUSINESS PHONE:		9412628577

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 13D/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-34225
		FILM NUMBER:		08818532

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13D/A
<SEQUENCE>1
<FILENAME>y57828a3sc13dza.htm
<DESCRIPTION>AMENDMENT NO. 3 TO SCHEDULE 13D
<TEXT>
<HTML>
<HEAD>
<TITLE>SC 13D/A</TITLE>
</HEAD>
<BODY bgcolor="#FFFFFF">
<!-- PAGEBREAK -->
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>
<DIV style="font-family: 'Times New Roman',Times,serif">


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>SECURITIES AND EXCHANGE COMMISSION</B>
</DIV>

<DIV align="center" style="font-size: 12pt"><B>WASHINGTON, D.C. 20549</B>
</DIV>

<DIV align="center" style="font-size: 18pt; margin-top: 12pt"><B>SCHEDULE 13D/A</B>
</DIV>

<DIV align="center" style="font-size: 10pt"><B>(Rule&nbsp;13d-101)</B></DIV>



<DIV align="center" style="font-size: 12pt; margin-top: 12pt"><B>INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO<BR>
FILED PURSUANT TO RULE 13d-2(a)</B>
</DIV>


<DIV align="center" style="font-size: 12pt; margin-top: 12pt"><B>(Amendment No.&nbsp;3)</B>
</DIV>

<DIV align="center" style="font-size: 24pt; margin-top: 12pt"><B><FONT style="border-bottom: 1px solid #000000">Gencor Industries, Inc.</FONT></B>
</DIV>

<DIV align="center" style="font-size: 10pt">(Name of Issuer)</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 12pt">Common Stock</DIV>

<DIV align="center" style="font-size: 10pt"><DIV style="margin-top: 1px"><FONT style="border-top: 1px solid #000000">(Title of Class of Securities)</FONT></DIV></DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 12pt">368678108</DIV>

<DIV align="center" style="font-size: 10pt"><DIV style="margin-top: 1px"><FONT style="border-top: 1px solid #000000">(CUSIP Number)</FONT></DIV></DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 12pt">Lloyd I. Miller, III, 4550 Gordon Drive, Naples, Florida, 34102 (Tel.) (239)&nbsp;262-8577</DIV>

<DIV align="center" style="font-size: 10pt"><DIV style="margin-top: 1px"><FONT style="border-top: 1px solid #000000">(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)</FONT></DIV></DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 12pt">May&nbsp;7, 2008</DIV>

<DIV align="center" style="font-size: 10pt"><DIV style="margin-top: 1px"><FONT style="border-top: 1px solid #000000"> (Date of Event which Requires Filing of this</FONT></DIV>
Statement)</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">If the filing person has previously filed a statement on Schedule&nbsp;13G to report the acquisition
that is the subject of this Schedule&nbsp;13D, and is filing this schedule because of Rule&nbsp;13d-1(e),
13d-1(f) or 13d-1(g), check the following box <FONT face="Wingdings">&#254;</FONT>.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt"><I>Note</I>. Schedules filed in paper format shall include a signed original and five copies of the
schedule, including all exhibits. <I>See </I>Rule&nbsp;13d-7 for other parties to whom copies are to be sent.
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt">(Continued on following pages)
</DIV>


<DIV align="Center" style="font-size: 10pt; margin-top: 6pt">Page 1 of 5 pages

</DIV>


<DIV align="left">
</DIV>
<DIV align="Center" style="font-size: 10pt; margin-top: 6pt">

</DIV>

 <DIV align="left">
<DIV style="font-size: 3pt; margin-top: 16pt; width: 18%; border-top: 1px solid #000000">&nbsp;</DIV>
</DIV>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD width="96"></TD>
</TR>

<TR valign="top">
    <TD nowrap align="left"><SUP style="font-size: 85%; vertical-align: text-top; ">1</SUP></TD>
    <TD>&nbsp;</TD>
    <TD>The information required on the remainder of this cover page shall not be deemed to be
&#147;filed&#148; for the purpose of Section&nbsp;18 of the Securities Exchange Act of 1934 or otherwise subject
to the liabilities of that section of the Act but shall be subject to all other provisions of the
Act (however, <I>see </I>the <I>Notes</I>).</TD>
</TR>

</TABLE>


<P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio -->
</DIV>

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<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
<TD width="1%">&nbsp;</TD>
<TD width="1%">&nbsp;</TD>
<TD width="20%">&nbsp;</TD>
<TD width="55%">&nbsp;</TD>
<TD width="1%">&nbsp;</TD>
<TD width="1%">&nbsp;</TD>
<TD width="9%">&nbsp;</TD>
<TD width="1%">&nbsp;</TD>
<TD width="1%">&nbsp;</TD>
<TD width="1%">&nbsp;</TD>
<TD width="9%">&nbsp;</TD>
</TR>
<!-- End Table Head -->
<!-- Begin Table Body -->


<TR valign="bottom">
<TD valign="top" nowrap><DIV style="margin-left:0px; text-indent:-0px">CUSIP No.</DIV></TD>
<TD>&nbsp;</TD>
<TD align="center" valign="top"><DIV style="border: 1px solid #000000">368678108&nbsp;</DIV></TD>
<TD align="center"><b>13D</b></TD>
<TD align="left" valign="top">Page</TD>
<TD>&nbsp;</TD>
<TD align="center" valign="top"><DIV style="border: 1px solid #000000">2&nbsp;</DIV></TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">of&nbsp;</TD>
<TD>&nbsp;</TD>
<TD align="center" valign="top"><DIV style="border: 1px solid #000000">5&nbsp;</DIV></TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>

<P>&nbsp;<DIV style="width: 100%; border: 1px solid black"><DIV align="center">

<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="1" width="100%">
<!-- Begin Table Head --><TR style="font-size: 1px">
<TD width="5%">&nbsp;</TD>
<TD width="1%" style="border-left: 1px solid #000000">&nbsp;</TD>
<TD width="5%">&nbsp;</TD>
<TD width="5%">&nbsp;</TD>
<TD width="1%">&nbsp;</TD>
<TD width="83%">&nbsp;</TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
<TD valign="middle" align="center"><FONT style="font-size: 18pt"><B>1</B></FONT></TD>
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left">NAME OF REPORTING PERSONS<BR>
<BR>
Lloyd I. Miller, III</TD>
</TR>
<TR valign="bottom">
<TD>&nbsp;</TD>
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left">&nbsp;</TD>
</TR>
<TR style="font-size: 1px">
<TD style="border-top: 1px solid #000000">&nbsp;</TD>
<TD style="border-left: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>

<TR valign="bottom">
<TD valign="middle" align="center" rowspan="3"><FONT style="font-size: 18pt"><B>2</B></FONT></TD>
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left">CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)<BR><BR></TD>
</TR>
<TR valign="bottom">
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left">(a)&nbsp;&nbsp;&nbsp;<FONT face="wingdings" size="2">&#111;</FONT>&nbsp;</TD>
</TR>

<TR valign="bottom">
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left">(b)&nbsp;&nbsp;&nbsp;<FONT face="wingdings" size="2">&#111;</FONT>&nbsp;</TD>
</TR>
<TR style="font-size: 1px">
<TD style="border-top: 1px solid #000000">&nbsp;</TD>
<TD style="border-left: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>

<TR valign="bottom">
<TD valign="middle" align="center" rowspan="3"><FONT style="font-size: 18pt"><B>3</B></FONT></TD>
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left">SEC USE ONLY</TD>
</TR>
<TR valign="bottom">
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left">&nbsp;</TD>
</TR>
<TR valign="bottom">
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left">&nbsp;</TD>
</TR>

<TR style="font-size: 1px">
<TD style="border-top: 1px solid #000000">&nbsp;</TD>
<TD style="border-left: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>

<TR valign="bottom">
<TD valign="middle" align="center" rowspan="3"><FONT style="font-size: 18pt"><B>4</B></FONT></TD>
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left">SOURCE OF FUNDS (SEE INSTRUCTIONS)</TD>
</TR>
<TR valign="bottom">
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="11" align="left">&nbsp;</TD>
</TR>
<TR valign="bottom">
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="11" align="left">PF-AF-OO</TD>
</TR>

<TR style="font-size: 1px">
<TD style="border-top: 1px solid #000000">&nbsp;</TD>
<TD style="border-left: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>

<TR valign="bottom">
<TD valign="middle" align="center" rowspan="3"><FONT style="font-size: 18pt"><B>5</B></FONT></TD>
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left">CHECK  BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)</TD>
</TR>
<TR valign="bottom">
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left">&nbsp;</TD>
</TR>
<TR valign="bottom">
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left"><FONT face="wingdings" size="2">&#111;</FONT></TD>
</TR>

<TR style="font-size: 1px">
<TD style="border-top: 1px solid #000000">&nbsp;</TD>
<TD style="border-left: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>

<TR valign="bottom">
<TD valign="middle" align="center" rowspan="3"><FONT style="font-size: 18pt"><B>6</B></FONT></TD>
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left">CITIZENSHIP OR PLACE OF ORGANIZATION</TD>
</TR>
<TR valign="bottom">
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left">&nbsp;</TD>
</TR>
<TR valign="bottom">
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left">United States
</TD>
</TR>

<TR style="font-size: 1px">
<TD colspan="3" align="left" style="border-top: 1px solid #000000">&nbsp;</TD>
<TD align="left" style="border-top: 1px solid #000000; border-left: 1px solid #000000; border-right: 1px solid #000000">&nbsp;</TD>
<TD align="left" style="border-top: 1px solid #000000">&nbsp;</TD>
<TD align="left" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>

<TR valign="bottom">
<TD align="center" colspan="3">&nbsp;</TD>
<TD valign="middle" align="center" rowspan="3" style="border-left: 1px solid #000000; border-right: 1px solid #000000"><FONT style="font-size: 18pt"><B>7</B></FONT></TD>
<TD>&nbsp;</TD>
<TD align="left">SOLE VOTING POWER</TD>
</TR>
<TR valign="bottom">
<TD align="center" colspan="3">&nbsp;</TD>
<TD>&nbsp;</TD>
<TD>&nbsp;</TD>
</TR>
<TR valign="bottom">
<TD align="center" colspan="3">NUMBER OF</TD>
<TD>&nbsp;</TD>
<TD align="left">156,045</TD>
</TR>

<TR style="font-size: 1px">
<TD colspan="3">&nbsp;</TD>
<TD align="left" style="border-top: 1px solid #000000; border-left: 1px solid #000000; border-right: 1px solid #000000">&nbsp;</TD>
<TD align="left" style="border-top: 1px solid #000000">&nbsp;</TD>
<TD align="left" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>

<TR valign="bottom">
<TD align="center" colspan="3">SHARES</TD>
<TD valign="middle" align="center" rowspan="3" style="border-left: 1px solid #000000; border-right: 1px solid #000000"><FONT style="font-size: 18pt"><B>8</B></FONT></TD>
<TD>&nbsp;</TD>
<TD align="left">SHARED VOTING POWER</TD>
</TR>
<TR valign="bottom">
<TD align="center" colspan="3">BENEFICIALLY</TD>
<TD>&nbsp;</TD>
<TD>&nbsp;</TD>
</TR>
<TR valign="bottom">
<TD align="center" colspan="3">OWNED BY</TD>
<TD>&nbsp;</TD>
<TD>762,121</TD>
</TR>

<TR style="font-size: 1px">
<TD colspan="3">&nbsp;</TD>
<TD align="left" style="border-top: 1px solid #000000; border-left: 1px solid #000000; border-right: 1px solid #000000">&nbsp;</TD>
<TD align="left" style="border-top: 1px solid #000000">&nbsp;</TD>
<TD align="left" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>


<TR valign="bottom">
<TD align="center" colspan="3">EACH</TD>
<TD valign="middle" align="center" rowspan="3" style="border-left: 1px solid #000000; border-right: 1px solid #000000"><FONT style="font-size: 18pt"><B>9</B></FONT></TD>
<TD>&nbsp;</TD>
<TD align="left">SOLE DISPOSITIVE POWER</TD>
</TR>
<TR valign="bottom">
<TD align="center" colspan="3">REPORTING</TD>
<TD>&nbsp;</TD>
<TD>&nbsp;</TD>
</TR>
<TR valign="bottom">
<TD align="center" colspan="3">PERSON</TD>
<TD>&nbsp;</TD>
<TD align="left">156,045</TD>
</TR>
<TR style="font-size: 1px">
<TD colspan="3">&nbsp;</TD>
<TD align="left" style="border-top: 1px solid #000000; border-left: 1px solid #000000; border-right: 1px solid #000000">&nbsp;</TD>
<TD align="left" style="border-top: 1px solid #000000">&nbsp;</TD>
<TD align="left" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>

<TR valign="bottom">
<TD align="center" colspan="3">WITH:</TD>
<TD valign="middle" align="center" rowspan="3" style="border-left: 1px solid #000000; border-right: 1px solid #000000"><FONT style="font-size: 18pt"><B>10</B></FONT></TD>
<TD>&nbsp;</TD>
<TD align="left">SHARED DISPOSITIVE POWER</TD>
</TR>
<TR valign="bottom">
<TD align="center" colspan="3">&nbsp;</TD>
<TD>&nbsp;</TD>
<TD>&nbsp;</TD>
</TR>
<TR valign="bottom">
<TD align="center" colspan="3">&nbsp;</TD>
<TD>&nbsp;</TD>
<TD align="left">762,121</TD>
</TR>
<TR style="font-size: 1px">
<TD style="border-top: 1px solid #000000">&nbsp;</TD>
<TD style="border-left: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>

<TR valign="bottom">
<TD valign="middle" align="center" rowspan="3"><FONT style="font-size: 18pt"><B>11</B></FONT></TD>
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left">AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</TD>
</TR>
<TR valign="bottom">
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left">&nbsp;</TD>
</TR>
<TR valign="bottom">
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left">918,166</TD>
</TR>

<TR style="font-size: 1px">
<TD style="border-top: 1px solid #000000">&nbsp;</TD>
<TD style="border-left: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>

<TR valign="bottom">
<TD valign="middle" align="center" rowspan="3"><FONT style="font-size: 18pt"><B>12</B></FONT></TD>
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left">CHECK  BOX IF THE AGGREGATE AMOUNT IN ROW (11)&nbsp;EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)</TD>
</TR>
<TR valign="bottom">
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left">&nbsp;</TD>
</TR>
<TR valign="bottom">
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left"><FONT face="wingdings" size="2">&#111;</FONT>
</TD>
</TR>

<TR style="font-size: 1px">
<TD style="border-top: 1px solid #000000">&nbsp;</TD>
<TD style="border-left: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>

<TR valign="bottom">
<TD valign="middle" align="center" rowspan="3"><FONT style="font-size: 18pt"><B>13</B></FONT></TD>
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left">PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)</TD>
</TR>
<TR valign="bottom">
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left">&nbsp;</TD>
</TR>
<TR valign="bottom">
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left">11.5&#37;</TD>
</TR>

<TR style="font-size: 1px">
<TD style="border-top: 1px solid #000000">&nbsp;</TD>
<TD style="border-left: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>

<TR valign="bottom">
<TD valign="middle" align="center" rowspan="3"><FONT style="font-size: 18pt"><B>14</B></FONT></TD>
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left">TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)</TD>
</TR>
<TR valign="bottom">
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left">&nbsp;</TD>
</TR>
<TR valign="bottom">
<TD style="border-left: 1px solid #000000">&nbsp;</TD>
<TD colspan="4" align="left">IA-IN-OO</TD>
</TR>
<!-- End Table Body --></TABLE>
</DIV>
</DIV>

<DIV style="font-size: 10pt; margin-top: 3pt">
</DIV>

<DIV style="font-size: 10pt; margin-top: 3pt">
</DIV>

<DIV style="font-size: 10pt; margin-top: 3pt">
</DIV>

<DIV style="font-size: 10pt; margin-top: 3pt">
</DIV>


<P align="center" style="font-size: 10pt">



</DIV>



<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>
<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>SCHEDULE 13D/A</B></DIV>

<!--TOC-->
<!--/TOC-->

<!-- link1 "Item 1. Security and Issuer" -->

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;1. </B><U><B>Security and Issuer</B></U></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">This constitutes Amendment No.&nbsp;3 (the &#147;Third Amendment&#148;) to the statement on Schedule&nbsp;13D, filed on
behalf of Lloyd I. Miller, III (&#147;Miller&#148; or the &#147;Reporting Person&#148;), dated June&nbsp;19, 2007, as
amended (the &#147;Statement&#148;), relating to the Common Stock, par value $0.10 per share (the &#147;Shares&#148;)
of Gencor Industries, Inc. (the &#147;Company&#148;). The Company has its principal executive offices at
5201 North Orange Blossom Trail, Orlando, Florida 32810. Unless specifically amended or modified
hereby, the disclosure set forth in the Statement shall remain unchanged.</DIV>

<!-- link1 "Item 4. Purpose of the Transaction" -->

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;4. </B><U><B>Purpose of the Transaction </B></U></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Item&nbsp;4 of the Statement is hereby amended and restated to read in its entirety as follows:</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Reporting Person previously disclosed the following:</DIV>

<DIV style="margin-top: 6pt">
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<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left"><B>&#149;</B></TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The Reporting Person decided that it would be in his best interest, and those of other
stockholders, to attempt to influence the governance of the Company.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left"><B>&#149;</B></TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The Reporting Person urged the Company&#146;s Board of Directors to investigate strategic
alternatives to maximize shareholder value, and to enhance disclosures to the Company&#146;s
public stockholders regarding each of the Company&#146;s lines of business and prospects.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left"><B>&#149;</B></TD>
    <TD width="1%">&nbsp;</TD>
    <TD>On November&nbsp;20, 2007, the Reporting Person sent a letter to the Company informing the
Company&#146;s Board of Directors of his intention to nominate himself, Lloyd I. Miller, III,
for election by the common stockholders to serve on the Board of Directors of the Company.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left"><B>&#149;</B></TD>
    <TD width="1%">&nbsp;</TD>
    <TD>On February&nbsp;15, 2008, the Reporting Person filed with the Securities Exchange
Commission, a proxy statement (the &#147;Proxy Statement&#148;) nominating himself, Lloyd I. Miller,
III, to be elected by the common stockholders to the Board of Directors of the Company.</TD>
</TR>



</TABLE></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;At the Company&#146;s annual meeting of stockholders on March&nbsp;6, 2008, the Reporting Person
was elected to the Company&#146;s Board of Directors by a vote of the common stockholders, as
announced at the annual meeting. On May&nbsp;7, 2008, Miller resigned from the Board of Directors of the Company. By winning
election to the Board of Directors in a proxy contest, Miller believes that he has demonstrated the
support of the common stockholders for his positions as stated in the Proxy Statement. Miller has
taken the opportunity of winning his proxy contest to ask the Company to consider nominating
independent new directors for election by the common stockholders to serve on the Board of
Directors. Miller concluded that he was unable to influence the policies of the Company further as
a member of the Board of Directors, and accordingly he has resigned as a director.</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Except as described above in this Item&nbsp;4 and herein, the Reporting Person does not have any
specific plans or proposals that relate to or would result in any of the actions or events
specified in clauses (a)&nbsp;through (j)&nbsp;of Item&nbsp;4 of Schedule&nbsp;13D. The Reporting Person reserves the
right to change plans and take any and all actions that the Reporting Person may deem appropriate
to maximize the value of his investments, including, among other things, purchasing or otherwise
acquiring additional securities of the Company, selling or otherwise disposing of any securities of
the Company beneficially owned by him, in each case in the open market or in privately negotiated
transactions, or formulating other plans or</DIV>

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<DIV style="font-family: 'Times New Roman',Times,serif">
<DIV align="left" style="font-size: 10pt; margin-top: 6pt">proposals regarding the Company or its securities to
the extent deemed advisable by the Reporting Person
in light of his general investment policies, market conditions, subsequent developments affecting
the Company and the general business and future prospects of the Company. The Reporting Person may
take any other action with respect to the Company or any of the Company&#146;s debt or equity securities
in any manner permitted by applicable law.
</DIV>

<!-- link1 "Item&nbsp;7. Materials To Be Filed As Exhibits" -->

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;7. </B><B><I>Materials To Be Filed As Exhibits:</I></B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;99.1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Letter of resignation of Lloyd Miller dated May&nbsp;7, 2008.
</DIV>


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</DIV>

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<DIV style="font-family: 'Times New Roman',Times,serif">



<DIV align="left" style="font-size: 10pt; margin-top: 6pt">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.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 12pt">Dated: May&nbsp;9, 2008
</DIV>


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    <TD colspan="3" align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
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    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000" align="center">                                          /s/  Lloyd I. Miller, III
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="center">Lloyd I. Miller,III&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>

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<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>y57828a3exv99w1.htm
<DESCRIPTION>EX-99.1: LETTER OF RESIGNATION
<TEXT>
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<TITLE>EX-99.1</TITLE>
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<DIV style="font-family: 'Times New Roman',Times,serif">


<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
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<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>Lloyd I. Miller, III</B><BR>
4550 Gordon Drive<BR>
Naples, Florida 34102
</DIV>


<DIV align="right" style="font-size: 10pt; margin-top: 12pt">Telephone: (239)&nbsp;262-8577<BR>
Telecopier: (239)&nbsp;262-8025
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt">May&nbsp;7, 2008
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Gencor Industries, Inc..<BR>
5201 North Orange Blossom Trail<BR>
Orlando, Florida 32810<BR>
Attention: Corporate Secretary

</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Dear Sir or Madam:

</DIV>
<DIV align="left" style="font-size: 10pt; margin-top: 6pt">I hereby resign as a member of the Board of Directors of Gencor Industries, Inc. effective May&nbsp;7,
2008.
</DIV>


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<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">Sincerely,<BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD colspan="3" align="left">/s/ Lloyd I. Miller, III
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD colspan="3" align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
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    <TD>&nbsp;</TD>
</TR>

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