can this block be welded?

[gazza2007au]

i should have checked this out before hand but i have only just gotten around to cleaning it and i have found on two of the 3 cylinders small areas where the cylinder wall is is only 2/3rds as thick as it should be will i be able to get this welded? yes its a salt water engine and probably has been its whole life
if not any anyone owns a outboard wreckers and willing to ship a powerhead to my in australia please PM me
johnson 1975 70hp

 

[alangf]

Re: can this block be welded?

i should have checked this out before hand but i have only just gotten around to cleaning it and i have found on two of the 3 cylinders small areas where the cylinder wall is is only 2/3rds as thick as it should be will i be able to get this welded? yes its a salt water engine and probably has been its whole life
if not any anyone owns a outboard wreckers and willing to ship a powerhead to my in australia please PM me
johnson 1975 70hp

I think you can use your original block without problems. The gaskets seal the combustion chambers on the surface of the steel (or cast iron) inner sleeve which is pressed into the aluminum casting. Make sure there are no areas where the aluminum has "blistered" away from the sleeves as this will result in hot spots around the cylinders and cause trouble.

 

[gazza2007au]

Re: can this block be welded?

yeah its all fine just the corrosion around the top of the cylinders is the problem

 

[14ftgrumman]

Re: can this block be welded?

I still have some bridges for sale.

 

[Sherman]

Re: can this block be welded?

That block only has ten or fifteen years left in it. Just put it back together after honing and a new set of rings.

 

[kenmyfam]

Re: can this block be welded?

I think you are still good to go for a while.

 

[Cofe]

Re: can this block be welded?

I'm with Sherman. The compression sealing surfaces look good. No welding necessary. Just get a new motor in 10-15 yrs.

 

[a70eliminator]

Re: can this block be welded?

I'm no outboard engine rebuilding expert so I was waiting to see some replies before said anything, but after these replies I've got to say it now, I would have never thought cylinders walls in that condition could be honed and put back together, the pitted areas look like it would take at least .010 to clean up, or is it not as critical with outboard motors? I wouldn't give that rebuild 1 year let alone 10-15 doing nothing but running a hone through the bores.

 

[kenmyfam]

Re: can this block be welded?

I'm no outboard engine rebuilding expert so I was waiting to see some replies before said anything, but after these replies I've got to say it now, I would have never thought cylinders walls in that condition could be honed and put back together, the pitted areas look like it would take at least .010 to clean up, or is it not as critical with outboard motors? I wouldn't give that rebuild 1 year let alone 10-15 doing nothing but running a hone through the bores.

Reading the post I don't believe the bores are the issue in question.

 

[1946Zephyr]

Re: can this block be welded?

myself, being an outboard mechanic of some 17 years, I would just look around and see if you could find a good block for a good price. The 70hp was quite a popular engine and should be easily obtained. One that has seen a lot of salt water use, really isn't worth spending a lot of time and effort on. In these current times, you should be able to find a replacement block for a decent price.