stihl livin
Do the Dallas
- Local time
- 12:12 PM
- User ID
- 18
- Joined
- Dec 4, 2015
- Messages
- 5,177
- Reaction score
- 27,262
- Location
- At the farm
That’s interesting. I cleaned this piston crown fully, I then mixed up 32:1 Amsoil Saber and put it in my stihl fs36 weed eater. Manual says to tune 9200rpm.
I tuned it to 8700 max rpm which was in and out of 4 stroking - didn’t want to go leaner.
Then I extended the trimmer line a few extra inches to load the powerhead up and that dropped the rpm by 1000 and it no longer 4 stroked.
I then tied a cable tie around the throttle and let it run like that, loaded for 20 minutes (with about 5 minutes of idle and throttle blips to tune it before hand) without cutting grass, just the longer length of line loading the powerhead. This is the result.
I love the smell and colour of Amsoil, but this was disappointing. Then again, if they have designed it to run at 80-100:1 then really I’m the ignorant one trying to mix it at 32:1 and expect a clean engine.
I’m going back and forth in my mind if I should do 50:1 or 80:1
I have seen Richard Flagg do videos on both, 80:1 and it’s basically spotless, not much residual in the crank though, but the saws he’s working in have had 80:1 for years and work hard no provlems. 50:1 it has much more carbon build up and almost seems unnecessary with this oil.
Here is the strimmer, I’d suggest 70% of the piston is clean, 30% has carbon. The carbon is somewhat soft and a bit gooey. Besides one earlier run for 15 minutes, this is the only other run it has had. This piston was mostly shiny clean before this run.
View attachment 351949
View attachment 351944 View attachment 351945 View attachment 351946 View attachment 351947
Your pictures show exactly what Kevin described does it not?