Potential cracked block

[dpancheri]

I have posted here with questions a few times before and you have all been very helpful. So here's my current problem. I have 1970 115 Evin. with a jet pump on it and I took it out for the first time this year a few days ago as the ice has just recently cleared out of the river to do some fishing so the water temp. was about 35deg. I noticed water running down the outside of the of lower end unit. So I pulled the cover off and had my son take the wheel so I could watch it while under power and a few small droplets of water were oozing from the head gasket on the #3 cyl.. There was additional water leaking from somewhere else on the back side of the motor but I could not lean over far enough to see where it was coming from. I pulled off the exhaust inspection cover back at my shop and a white frothy water/oil mixture could be seen on both port side exhaust ports. I am thinking it is a warped head ,but how common are cracked blocks. Could it be possible that a bit water froze in cyl. water jacket over the winter and cracked the block? Also I felt the cyldrs. at the same time and they were not even luke warm.
Thanks for any help.
Dave

 

[ezeke]

Re: Potential cracked block

It may well be nothing more than a blown head gasket or exhaust cover gasket. Take the cylinder head off and see what has happened.

BTW, keep those cylinders over oiled until you get past the water problem.

 

[tashasdaddy]

Re: Potential cracked block

if you stored the motor in the down operating postion, the block is self draining. i agree pull the head.

 

[dpancheri]

Re: Potential cracked block

Thanks for the help on the cracked block, I have already pulled the head and cannot tell by looking if the head is warped so I will have to scrape off the gasket and lay it on a flat plate of glass and look at. I did find something else though, the middle ring on the #3 piston is gone and the top of the piston and the cyl. hd.dome are all gouged up however the exhaust ports look fine, I can see where the head has been sanded like it has been warped before. The piston and head damage look old like it has been running this way for awhile. I think maybe someone has tried fix a warped head and jury rigged it back together. I have another block with 3 good pistons in it and if they are within wear spec I might hone this cylinder a little bit and put new rings on one of those pistons and reassenble it and run it. I don't use it alot and I am careful with it so I might be able to get by with it for awhile. Do any of you with some rebuild experience see any real problem with doing this? I know its not the correct way but do you think I can get away with it. I have had alot experience rebuilding 2 strokes just not Outboards so I need you guys opinion.
Thanks once again.
Dave P.

 

[R.Johnson]

Re: Potential cracked block

You could get away with that. It depends on what you find when you get it apart.