mercruiser 140 block compatability

[rolmops]

Hello Guys.
I have been offered to buy a running mercruiser 140 engine (#2960713)1968 to 1972 for $150. The owner told me that it runs and has not been over bored and the compression is 120/120/120/70.
My own engine is a 1984/5 that has one low cylinder (90). Can I over bore (if necessary) the older block and rebuild my 1984 on this restored block or is it too different?
Thank you for your advice and opinions.
Cornelis.

 

[Bondo]

Re: mercruiser 140 block compatability

Ayuh,.... As far as I know, the only major change to that block, since it's beginnin', is 'round '90, the crank seal changed to a 1 piece...

There for, Yes, you should have little to No problems with yer plan...

Those blocks should easily take a .030 over-bore...
Yer Machinist can better answer any in detail questions 'bout their compatibility...

 

[rolmops]

Re: mercruiser 140 block compatability

Thank you Bondo. How is the walleye fishing in the trench?

 

[Bondo]

Re: mercruiser 140 block compatability

Ayuh,.... Donno,.... My neighbor says they're hittin' in Black River Bay, 'n 'round Point Peninsular,...

I Just finally got the houseboat moored in front of the house, 'n Hopefully, the Fishin' Barge will get launched This weekend...
What's normally a 4 hour operation(the houseboat), turned into a 2 week nightmare...
I still gotta service the Fishin' Barge, 'n drag it out to Chaumont...

Spring really got the jump on me this year,... I'm runnin' 'bout a month behind....