Discussion in 'Chainsaw' started by alexcagle, May 4, 2019.
Stopped so fast it sheared the flywheel keyway.
I don’t think JBWeld is gonna work.
I thought "Rod Carnage" was a new pro wrestler.
Any ideas on why it failed like that?
With that bend the piston must have went out the port or the cylinder failed spectacularly!
Agreed. Do you have a picture of the jug? If it were a matter of something blocking the piston, there would be a 2nd bend somewhere in the rod. The fact that it's bent in 1 spot tells me that the rest of the energy was absorbed by something other than the rod.
How does a rod bend sideways?
One of the original wrist pin clips was in the bottom crankcase pan.
I'm assuming the wrist pin shifting to one side caused stress on the piston enough to rip a web out of it, then on the return stroke it slammed the piston hard enough to bend the stamped steel rod.
The cylinder and valves weren't damaged.
I was on my phone and didn't see that piece of junk stamped rod.
Looks like when a car hydraulics after travelling through deep water!
I had several junker 40mm HT130 engines I got a few years back to scavenge, and in under an hour, I pieced a nice strong trimmer together.
My guess.....too many RPM's jerked the wrist pin out of the bottom of the piston by breaking out the pin holes....and then the rod commenced to hammering the bottom of the piston and got bent as the crankshaft coasted to a halt!
The clip couldve be tossed there during the failure
Duhhh....guess I need to learn how to read!!!!
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