Nutball
Here For The Long Haul!
- Local time
- 7:47 PM
- User ID
- 7732
- Joined
- Oct 31, 2018
- Messages
- 4,038
- Reaction score
- 11,009
- Location
- Mt. Juliet, TN
So, my 490 started out likely as a home depot return I got from a refurbisher for cheap. It looked nearly new, linear marks in the cylinder were few and couldn't be felt: they were just polished lines. After a port job and a thorough cleaning to ensure metal dust is removed, and 9 15" cookies later I take it apart since I used the wrong gasket maker and noticed the stuff liquefying. The saw ran very well the whole time. After I took it a part I notice many scratches in the cylinder that I can feel with my finger nail. WTH? Assembled with plenty of Benol... lots of it to avoid extreme initial wear from any left over metal dust. 40:1 fuel used.
The scoring seems pretty even around the cylinder, so the ring ends or ports don't seem to be the problem.
Guess I'll run it on 32:1 for the rest of it's life. I don't think new rings would be worth it would it?
EDIT: I just remembered when cutting cookies, on the 4rth or 5th in a row it seemed to loose a little power as if it was an old wore out saw getting hot. It didn't loose much though, and the cut times were only getting faster.
The scoring seems pretty even around the cylinder, so the ring ends or ports don't seem to be the problem.
Guess I'll run it on 32:1 for the rest of it's life. I don't think new rings would be worth it would it?
EDIT: I just remembered when cutting cookies, on the 4rth or 5th in a row it seemed to loose a little power as if it was an old wore out saw getting hot. It didn't loose much though, and the cut times were only getting faster.