Got a new Stihl 4-mix, now what?

[trickasabrick]

Hi everybody, first post after lurking a while. Been getting opinions on trimmers, (and boy, are there lots of opinions :confused:). Finally settled on a Stihl FS90R. Used it yesterday for about an hour, and it runs great and has very good power.

My question now is what are some things that I can do to keep it running like this. I've read horror stories about carbon induced valve failures and such, and I'd really rather avoid that if possible. I plan on using the Stihl Ultra synthetic oil and 93 octane gas. Is there anything else that can help with these engines? Has anybody tried using a small amount of Seafoam in the gas to help keep the carbon buildup down? I've used it in lots of other engines, and it seems to help.

Anyway, great site, and appreciate any info.

Dave

[KCfireman]

well, you start it up, and you use it!

[B&A lawn care]

We own two FS110, one of them is in its fourth season. The only issue we have had with them was when we were using regular oil and fouling plugs. Since we went to Ultra that is fixed. Should be no carbon issues with Ultra @50-1. There is a valve setting proceedure at XX hours that we should look into.

[trickasabrick]

well, you start it up, and you use it!

I figured that one out already:p

[davido30093]

It will do no good and could actually do harm.