eavega
Lieutenant
- Joined
- Apr 29, 2008
- Messages
- 1,377
Re: What did I do wrong?
I did notice that it was somewhat reddish. I have no idea of how the motor was run prior to it coming into my possession, so that is a definite possibility. Could this just be a simple case of metal fatigue, then? I'm really trying to find a learned lesson here other than "its almost 40 years old. Things break".
This has already turned into a recovery operation. Barring finding a cheap donor motor, the cost of just replacing the piston and welding the crankcase has me half-way to the cost of re-powering. Plus, I feel that my boat was underpowered with a 50, which may have led to its untimely demise. I've located a reasonably priced running 1976 70 HP Johnson that I'm gonna go test out on Saturday. I've already got buyers for a couple of parts off the motor, and I think I should be able to cover the cost of the 70 HP by selling off the Lower unit, starter, and remote control. These parts are hard to find in working order for the 1972 Evinrudes. Other random parts (ignition components, crank, rods, etc) that I can ebay away would just be icing on an otherwise bitter cake.
Thanks for the comments and observations.
-E
The piston that broke, almost looks like it was heated way up one time or another, the color of the rod looks to be off, which might be what caused the metal fatigue...
I did notice that it was somewhat reddish. I have no idea of how the motor was run prior to it coming into my possession, so that is a definite possibility. Could this just be a simple case of metal fatigue, then? I'm really trying to find a learned lesson here other than "its almost 40 years old. Things break".
Hell, I would go ahead and rebuild it. Tearing it down puts you half way there already. Just replace both of the pistons, hone the cylinders out and fix the holes in the crank.
This has already turned into a recovery operation. Barring finding a cheap donor motor, the cost of just replacing the piston and welding the crankcase has me half-way to the cost of re-powering. Plus, I feel that my boat was underpowered with a 50, which may have led to its untimely demise. I've located a reasonably priced running 1976 70 HP Johnson that I'm gonna go test out on Saturday. I've already got buyers for a couple of parts off the motor, and I think I should be able to cover the cost of the 70 HP by selling off the Lower unit, starter, and remote control. These parts are hard to find in working order for the 1972 Evinrudes. Other random parts (ignition components, crank, rods, etc) that I can ebay away would just be icing on an otherwise bitter cake.
Thanks for the comments and observations.
-E