So I'm looking at my latest y block acquisition here. Its a marine y block. Has the side draft intake set up. Ports drilled in the timing cover water castings. Big square oil pan. There are no numbers to be found on the block. I've looked at all the tell tale places to look and nothing. I wire brushed the same areas to see if someone has taken then off but it's all original casting. No grind or file marks at all. Funny. Any opinions out there??

Check in the area where the distributor mounts for some I.D. information.
Oldmics

This is a follow-up to Oldmics suggestion.  This web page on John Mummert's site may help...
http://ford-y-block.com/Block%20identification.htm


NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York

Looking at the front of the engine, look at the right side at the flat area below the deck to head parting line.  It’s found that most of the marine engines have the direction of rotation and the cubic inch stamped there.  L, LH, R, RH are some of the designations I’ve seen for the rotation stamped at the front of the block.

Lorena, Texas (South of Waco)

Yup. As I said. Nothing anywhere. Not even the rotation stamp. I tore it down last night and found it has been sleeved in 3 holes but has pitting in 2 due to water sitting in the cylinders. Not worth saving the block. Cam shaft is brand new. It's full of assembly lube and the rods have been line bored and bushed. Some good parts to go into my 272 + 0.060 find last month. Still verry odd though.

So theres No casting marks above oil filter area? If so as suggested check near distributor base area, seems strange if theres none.


  AussieBill            YYYY    Forever Y Block     YYYY

 Down Under, Australia

Whats on the main caps?
Oldmics

It's suspicious if there are no external casting numbers/letters..Maybe they were ground off at some point?  If so, that might be an indication that the boat & or motor was stolen at some point..


Paul

Let me add that the engine rebuilders bored a significant number of 272 blocks out to the 292 size.  Once doing this, they removed the 272 casting numbers (ECG) to keep the engine from being identified later as a 272.  If your engine has been previously rebuilt and is now a standard bore, then that raises the possibility that it started out life as a 272.  Not being stamped at the front could also mean the block has been changed out in the past.  Sonic testing the cylinders could help to prove or disprove this.

Lorena, Texas (South of Waco)