Yamaha 50hp outboard block repair

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Got a couple questions before i respond to my customer that has a cracked engine case that needs repaired . so from what i have researched so far they used a propriety alloy for the engine case ydc-30 alloy i have turned up no info on this alloy ands its weldability. If anyone has done. Repairs on these motor cases that can shed some light on the subject i would greatly appreciate it ...kinda wish sundown was still on the board hereLast edited by WeldorWes; 06-10-2016 at 10:34 PM.Miller Xmt 350Lincoln Ln-25Ahp 200xSmith Gas Mixer AR/HTig is my Kung FuThrowing down dimes and weaving aboutInstagram http://instagram.com/[email protected]
Reply:What do you mean by engine case, the block?RyanMiller Multimatic 200 tig/spool gun/wireless remoteMillermatic 350P, Bernard/XR Python gunsMiller Dynasty 350, Coolmate 3.5 & wireless remoteCK WF1 TIG wire feederMiller Spectrum 375 XtremeOptrel e684Miller Digital EliteMiller Weld-Mask
Reply:Originally Posted by xryanWhat do you mean by engine case, the block?
Reply:Its a 2002 yamaha 50 hpSent from my LG-H811 using TapatalkMiller Xmt 350Lincoln Ln-25Ahp 200xSmith Gas Mixer AR/HTig is my Kung FuThrowing down dimes and weaving aboutInstagram http://instagram.com/[email protected]
Reply:Some Yamahas (same as mercury) are Magnesium. I can't quite imagine where that is. Is it just an external water jacket?
Reply:Originally Posted by WeldorWesIts a 2002 yamaha 50 hpSent from my LG-H811 using Tapatalk
Reply:Find the piece(s) that broke out and see if you can puddle, and add aluminum filler.  Can't imagine Yamaha would be too forthcoming with repair info on their engine cases.  Probably just have to go for it. The way I look at it - it can't get much more broken.....
Reply:If I remember that construction, is that just a water coolant cover? Or is it actually part of the block?
Reply:Yup, find a piece and see if it takes a weld. Can't ruin the part much more than it already is.12v battery, jumper cables, and a 6013.I only have a facebook page. https://www.facebook.com/pages/VPT/244788508917829
Reply:Originally Posted by blackbartIf I remember that construction, is that just a water coolant cover? Or is it actually part of the block?
Reply:Originally Posted by blackbartSome Yamahas (same as mercury) are Magnesium.
Reply:[QUOTE=Kelvin;7348091]Magnesium would last about 90 seconds in saltwater before it disappeared. You could put a zinc anode on a magnesium engine, and the magnesium would corrode before the zinc. (Magnesium anodes are used instead of zinc in freshwater because they're even more anodic than zinc.)I had been told a rumor that Johnson used to have beach parties where the bonfire had mercury magnesium blocks in it, probably a rumor.
Reply:went and saw the motor its item #2 pulling it tomorrow and repairing Sent from my LG-H811 using TapatalkMiller Xmt 350Lincoln Ln-25Ahp 200xSmith Gas Mixer AR/HTig is my Kung FuThrowing down dimes and weaving aboutInstagram http://instagram.com/[email protected]
Reply:going to use 4943 filler as per mine and shovelon's convo weld prep it then in goes into a ultra sonic hot soap bath then acid etch the weld zone with a combo of nitric and hydroflouric acidSent from my LG-H811 using TapatalkMiller Xmt 350Lincoln Ln-25Ahp 200xSmith Gas Mixer AR/HTig is my Kung FuThrowing down dimes and weaving aboutInstagram http://instagram.com/[email protected]
Reply:Good luck.  Let us know how it turns out.
Reply:Please tell me that you are not going to weld this with it still on the motor. If so I would not think I would do the job because you will contaminate the inside of the motor with metal particles.Klutch 220si mig , stick, and dc tigHobart 140 AHP ALPHA 200X 2016Lotos LTP5000DSmith O/P
Reply:Originally Posted by tinker001Please tell me that you are not going to weld this with it still on the motor. If so I would not think I would do the job because you will contaminate the inside of the motor with metal particles.
Reply:Nitric and hydrofluoric acids?
Reply:Originally Posted by blackbartI had been told a rumor that Johnson used to have beach parties where the bonfire had mercury magnesium blocks in it, probably a rumor.
Reply:Originally Posted by KelvinNitric and hydrofluoric acids?
Reply:Looks like it is a guide/slide for the shift mechanism? Is the cause known for the breakage?12v battery, jumper cables, and a 6013.I only have a facebook page. https://www.facebook.com/pages/VPT/244788508917829
Reply:Originally Posted by VPTLooks like it is a guide/slide for the shift mechanism? Is the cause known for the breakage?
Reply:Originally Posted by VPTLooks like it is a guide/slide for the shift mechanism? Is the cause known for the breakage?
Reply:not the worlds prettiest but thats a die casting for u now its off to the machine shopMiller Xmt 350Lincoln Ln-25Ahp 200xSmith Gas Mixer AR/HTig is my Kung FuThrowing down dimes and weaving aboutInstagram http://instagram.com/[email protected]
Reply:Should be good nuf, cast sucks most times.12v battery, jumper cables, and a 6013.I only have a facebook page. https://www.facebook.com/pages/VPT/244788508917829Originally Posted by WeldorWes not the worlds prettiest but thats a die casting for u now its off to the machine shop
Reply:Originally Posted by shovelonNicely done Wes. Did a lot of oil burn out?
Reply:Hydroflouric?Don't go near that stuff. You get that on you and they have to amputate the part you got it on to save your life, if your lucky.
Reply:Looks Good WesBacked my CATMA over your CARMA oops clusmy me  What would SATAN do ?? Miller Trailblazer 302 AirPakMiller Digital Elite  Optrel Welding HatArcair K4000Suitcase 12RC / 12 VSHypertherm PM-45Rage 3 sawRusty old Truck
Reply:Originally Posted by jackdawgHydroflouric?Don't go near that stuff. You get that on you and they have to amputate the part you got it on to save your life, if your lucky.
Reply:Just wondering what's different about that filler you used. Why was it the better choice for this job?  I've repaired a lot of outboards. Mostly skegs and cavitation plates. Don't recall doing any crankcases.  I've always used 4043. I tried 5356 once because Zap said 4043 was for billet  5356 was for cast.  5356 was too brittle in my opinion. But I was curious about the filler you used. Hoping to get educated. Sent from my SM-S902L using TapatalkMiller Bobcat 225AHP AlphaTig 200X
Reply:Originally Posted by SJCJust wondering what's different about that filler you used. Why was it the better choice for this job?  I've repaired a lot of outboards. Mostly skegs and cavitation plates. Don't recall doing any crankcases.  I've always used 4043. I tried 5356 once because Zap said 4043 was for billet  5356 was for cast.  5356 was too brittle in my opinion. But I was curious about the filler you used. Hoping to get educated. Sent from my SM-S902L using Tapatalk