"WRXasaurus" (wrxasaurus)
05/25/2016 at 17:42 • Filed to: Mowerlopnik, John Deere, Briggs & Stratton
2
7|
"WRXasaurus" (wrxasaurus)
05/25/2016 at 17:42 • Filed to: Mowerlopnik, John Deere, Briggs & Stratton | 2
| 7 |
Here was the aftermath when I pulled the case apart on my Briggs and Stratton 11.5HP engine, lots of metal bits.
After I got the piston out this is what I found after I cleaned up the bore, unbelievable how just that one divot is all the damage.
And here is the culprit of the whole thing. As you can see, the rod is just not in one piece anymore.
Thankfully one of my coworkers is going to give me his old spare engine so after some paint and elbow grease my mower will look much better and run once again.
RamblinRover Luxury-Yacht
> WRXasaurus
05/25/2016 at 19:40 |
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Is that a set of quiet package IC crank counterweights I see? Also saying “IC”, the steel bore, obviously.
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WRXasaurus
> RamblinRover Luxury-Yacht
05/25/2016 at 19:45 |
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Yeah, I think the majority of it is the rest of the rod
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RamblinRover Luxury-Yacht
> WRXasaurus
05/25/2016 at 19:52 |
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Kind of a shame, really. A quiet package IC that should have run for a really long time yet going “FOOOM”. We had a 12hp that got some sand-tracking in the counterweights and needed them replaced, but the crank and bore didn’t get damaged like this.
zeontestpilot
> WRXasaurus
05/25/2016 at 20:36 |
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Is all that oil suppose to be in the engine?
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WRXasaurus
> zeontestpilot
05/25/2016 at 21:10 |
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Looks like quite a bit but the engine is upside down there. All that was the residual after I drained it down. There is a plate that I have no idea what’s for there.
You can tell a Finn but you can't tell him much
> WRXasaurus
05/26/2016 at 16:19 |
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That plate is probably a windage tray. I’m assuming the oil pan sits below that, but I’m not super familiar with small engines like that. From your other video it looks like the piston sits horizontally and the shaft hangs down below the tractor where there is a belt and pulley system to run the mower deck and maybe the drive. The windage tray keeps the wind blown around by the moving crank from foaming up the oil too bad.
The rod looks like the big end exploded, but somehow enough stayed together to keep the rod bolt held in place so that is what dinged the cylinder bore. Too bad, if wasn’t for that ding you could probably have gotten a new crank, piston and rod and been good to go. Maybe you still could if that ding is below where the rings are at BDC. There may be other problems that aren’t super obvious though with it grenading so bad. Plus it is probably difficult to actually source those parts and cheaper to just get a new engine.
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WRXasaurus
> You can tell a Finn but you can't tell him much
05/26/2016 at 19:40 |
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Yeah, I figured it was something like that but the correct term eluded me. I got another block from a co-worker and just got done changing the starter, throttle linkage, carburetor and timing sensor changed over to it. Everything on the one I got was damaged and it was gravity feed not vacuum feed like mine. Now I just need to finish repainting the body and re wire it so I actually have lights.