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Toro 6.5 hp rebuilt - Won't start
- Thread starter stevehenri
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- Oct 30, 2012
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Before I tell my story, THANKS FOR ALL OF THE SUGGESTIONS !!!
I checked compression today and I was at 30 lbs. Took the block apart and found:
a) piston must have hit something
b) one side of piston squashed tight on oil rings
c) outside of piston and inside of cylinder wall have matching gouges
d) may have even bent the valve stems
So, between the oil rings not moving and the valve seats not squared up, I think I found the issue. This one goes in the junk heap but I sure learned a lot !
Stevehenri
I checked compression today and I was at 30 lbs. Took the block apart and found:
a) piston must have hit something
b) one side of piston squashed tight on oil rings
c) outside of piston and inside of cylinder wall have matching gouges
d) may have even bent the valve stems
So, between the oil rings not moving and the valve seats not squared up, I think I found the issue. This one goes in the junk heap but I sure learned a lot !
Stevehenri
you could always bore it .030 over and get a new .030 over piston & rings. Check also your crank pin and con rod for scoring. With a new piston/rings and a freshly bored/honed cylinder, and assuming the lower end is OK, you would $ave a lot of money plus it would be a good winter project and be "like new". If you "DO" elect to rebuild, remember this forum. There are "many" here that will help and guide you through the rebuild process.
With this engine boring and refitting would be more coatly than purchasing a new unit. It you think that way short block would be the way to go, but still costly. Purchasing new unit probably the best.
Before I tell my story, THANKS FOR ALL OF THE SUGGESTIONS !!!
I checked compression today and I was at 30 lbs. Took the block apart and found:
a) piston must have hit something
b) one side of piston squashed tight on oil rings
c) outside of piston and inside of cylinder wall have matching gouges
d) may have even bent the valve stems
So, between the oil rings not moving and the valve seats not squared up, I think I found the issue. This one goes in the junk heap but I sure learned a lot !
Stevehenri
After reading all the posts I am wondering what got into the cylinder where the piston knocked the chunk out of it and the wall as well? I know she's headed for the bone yard, and I keep all my old engines as well for that purpose. The only thing I could think of that would cause such damage is if a valve dropped down. Hardly anyone rebuilds an engine these days, just either short block it or get a new unit. That's why there are so many throw-away mowers by the trash and in the dumps these days.
After reading all the posts I am wondering what got into the cylinder where the piston knocked the chunk out of it and the wall as well?
I have seen "many" times where the small screws that hold the choke/throttle butterfly(s) to their shafts, come loose and get sucked into the engine. Sometimes I have found them stuck under the exhaust valve, preventing the valve from closing, and sometimes they score the cylinder.