water intrusion in cylinder

[ronuncw]

I have a 1991 evinrude 150 hp spitfire with water intrusion only in cylinder #1. I've heard it could be attributed to the lost foam casting process (glue seam leak). I've spoken to numerous mechanics and read older reader responses with regard to this matter. And yet I'm still no further in deciding if it can be reliably fixed. Some suggest tig welding the crack while others would use a special glue when resleeving that cylinder. I've spoken to shops in Florida who "specialize" in that repair, but I'm skeptical in dealing with someone out of state. Is there a particular shop anyone recommends? Any thoughts or suggestions would be greatly appreciated.

 

[clanton]

Re: water intrusion in cylinder

Precision in Clearwater Florida. DHadley may know of someone else.

 

[Dhadley]

Re: water intrusion in cylinder

I would use Precision myself or Mar-Fab. Either one. What other shops have you spoken to?<br /><br />A "special" glue aroung the sleeve will not fix it. You have to repair the glue seam itself.<br /><br />FYI -- Its very odd for a 91 to do it.

 

[ronuncw]

Re: water intrusion in cylinder

Here's my situation. I've 4 cylinders at .030 with OEM pistons and two at 040. with Wieseco. The #1 cylinder with water has minimal scoring, problably beyond honing but more likely could be bored to .040. I've even been told Wiesco goes to .064 for some blocks. Since the VRO system is disabled, I'm guessing that's the reason for at least one of the rebuilds. BTW, What other issues would allow water to enter only the #1 cylinder? Please advise.

 

[DHPMARINE]

Re: water intrusion in cylinder

okstfan, I hope you haven't over looked a bad head gasket,or O ring,if that is what it has.<br />A few years ago we had a 40 Johnson taking h2o on one cylinder.Finally separated the crankcase,and fill water passages.Water was entering between the cast block and cast in liner.Is that the glue seam?At anyrate OMC said no reliable fix.With nothing to lose,we tried J B Weld.Saw the motor a year later and it was still running fine.<br />DHP

 

[mship]

Re: water intrusion in cylinder

okstfan,<br />I had the same glue seam leak on the #1 cylinder on my 92 Evinrude 150 and scored that piston and sleeve because of water intrusion. I went the JB Weld route. I have been running the motor over a year now with no problems. If you need more info let me know. Does okst refer to the Cowboys? If so -- "GO POKES"

 

[ronuncw]

Re: water intrusion in cylinder

Originally posted by mship:<br /> okstfan,<br />I had the same glue seam leak on the #1 cylinder on my 92 Evinrude 150 and scored that piston and sleeve because of water intrusion. I went the JB Weld route. I have been running the motor over a year now with no problems. If you need more info let me know. Does okst refer to the Cowboys? If so -- "GO POKES"

How in the world did you find the fracture? I've looked with magnifying lenses (the ones jewelers use) and I haven't been able to spot anything. I've heard many people with this problem use the JB Weld with plenty of success, but no specifics on how they applied it, sanded it etc. I'm sure willing to try just about anything, given the alternative - another remanufactured block...OUCH! And yes OKSTFAN does bleed orange - class of '91. RIDE 'EM COWBOYS !

 

[mship]

Re: water intrusion in cylinder

okstfan,<br />The sleeve for that cylinder as well and crank and reed blocks must be removed.I made a block off plate and bolted it to the bottom of the powerhead to block off the water passages and reinstalled the heads. The pee hole must be blocked also. I added a connection in this plate for air pressure. I pressured up the block to 30 PSI and then soap and water tested to find the location and extent of the crack or separation. I then ground out a groove and roughed up the area for the JB weld thru the reed block opening. The crack was at the top close to the rectifier mount. I pressured up the block again to make sure that I got it sealed. Wish I had taken pictures. Good Luck and keep us posted.