Home | Classifieds | History | Technical | Links | Store | About Us | Email
Topics Topics Edit Profile Profile Help/Instructions Help Member List Register  
Search Last 1|3|7 Days Search Search Tree View Tree View  

Lycoming UAB vs UAC

Old Marine Engine » Multi Cylinder Gas Inboards » Lycoming UAB vs UAC « Previous Next »

Author Message
Top of pagePrevious messageNext messageBottom of page Link to this message

wheels4u22
Member
Username: wheels4u22

Post Number: 11
Registered: 10-2012
Posted on Sunday, September 08, 2013 - 09:47 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Can anyone tell me what the difference is between these 2 engines other than what shows on the posted item? I believe many components are the same but still approx 40lbs difference. Also interesting that they are similar Hp up to 2000rpm or so and the chart stops at 2400 for the UAC. Which makes sense being a workhorse engine instead of higher speed runabout engine like the UAB.
image/bmp
IMG_0003.bmp (118.8 k)
Top of pagePrevious messageNext messageBottom of page Link to this message

bruce
Senior Member
Username: bruce

Post Number: 404
Registered: 07-2002
Posted on Monday, September 09, 2013 - 01:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I think the UAC may have the starter generator where the UAB does not ?????
Top of pagePrevious messageNext messageBottom of page Link to this message

oldwatercar
New member
Username: oldwatercar

Post Number: 2
Registered: 11-2008
Posted on Monday, September 09, 2013 - 01:47 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Contact Dave Triano
dtriano@mac.com


Dave is president of the Dodge Boat Owners association and will have all the info you need on the lycoming.
Top of pagePrevious messageNext messageBottom of page Link to this message

ldobbins
Senior Member
Username: ldobbins

Post Number: 126
Registered: 12-2002
Posted on Wednesday, September 11, 2013 - 11:10 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

The UAB and UAC are the same engine. Rated at 45 HP. The UAC has a reduction gear if I remember correctly.

The above post is correct, Contact Dave Triano in South Lake Tahoe as he has collected a lot of Lycoming information as they were used in Dodge boats.

The UAB and later UAE (58 HP) were also used in the Mullins Sea Eagle line of boats.

Cheers,

Lew
Top of pagePrevious messageNext messageBottom of page Link to this message

wheels4u22
Member
Username: wheels4u22

Post Number: 12
Registered: 10-2012
Posted on Wednesday, September 11, 2013 - 11:46 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hi All,

I have been in contact with Dave in the past as well as on this question and he has no info on the UAC.
The UAC has lower compression @ 5:1 vs UAB at 6:1 (some publications say 6.25:1). So far only the head seems different with different stampings on it and a larger dish for the cylinders. All of the externals are the same and so far all of the valves and lifters. The top of the block has stamped in it UAC right by the intake and it looks like it was done at factory to differentiate it from a UAB. Also the UAC has a straight 1" diameter out shaft vs I think 3/4 or 7/8 tapered. I am disassembling one for parts and am trying to see how much I can use to resurrect a UAB. I was hoping some one could tell me if the crank/pistons/ cam etc are the same.

Thanks,
Chris

Add Your Message Here
Post:
Bold text Italics Underline Create a hyperlink Insert a clipart image

Username: Posting Information:
This is a public posting area. Enter your username and password if you have an account. Otherwise, enter your full name as your username and leave the password blank. Your e-mail address is optional.
Password:
E-mail:
Options: Automatically activate URLs in message
Action:

Administration Administration Log Out Log Out   Previous Page Previous Page Next Page Next Page

Home | Classifieds | History | Technical | Links | Store | About Us | Email
&copy 2005 OldMarineEngine.com, P.O. Box 188, Forest Dale, VT 05745-0188 • Phone: 802-247-4864 • All rights reserved.
   Marine Engine Seloc Repair Manual Lookup Tool

marine gas engine repair and restoration