Has anyone tried to do this to a OMC block?

[thaw ripper]

Take a OMC V6 235 hp crossflow 1978-79 block, bore size 3.500"/std pistons, and bore it out to fit 3.625"/ std pistons, sleeve walls would be very thin, but it's ported big time. Can it be done? ~tr~

[Propelled Marine]

Guy's have done it , but you have to change the heads.

[Jeff_G]

It has been successfully done with all the 3.5 inch bores and some guys resleeve all the cylinders with thick sleeves then bore. A cheaters trick with the v-4 when the ci limit was under 100 ci.

[berg969]

did it with a yamaha 3 cyl the only problem was the headgasket
http://forums.screamandfly.com/forums/attachment.php?s=&postid=511682

[thaw ripper]

Don't know if I'm going to try it, it's 30 over now and got some deep grooves in one of the sleeves. I'm going to try 44 over first.

[Propelled Marine]

You can just put in a new sleeve.......They're very inexpensive

About $30.00

[BarryStrawn]

Wiseco makes .064 oversize. I don't think you can bore it .125 over.