Believe it or not a Coke can is the right dimension that's what I used.

@@pureblood324 you are correct, I’ve found that out since my earlier comment. Thanks bud 👍🏼

You don’t have to take them apart to clean the carbon Stihl makes a decarobonizer fluid that cleans the valves and combustion chamber. BR series blowers with the 4 mix engine time with the lobe up, FS series 4 mix time with the lobe down.

Yes it appears stihl quality isn’t there

@@LivingInFloridaPanhandle I mean great engine just needs a metal cam gear and would be perfect. A small turbo would be badass.

Take a picture of the camshaft and all of the internals of the engine and email them to me at themowermedic1@gmail.com

Hey medic , you ain't going to believe what was the problem , after breaking down the engine apart to check piston bearings and all the fun cleaning all that red silicone , I put it back together and did the same thing ,turned on well but in open throttle it would boug down 👇. I was upset 😭. Dam it boy . So I said last shot , had a used magnito from an old fs91R .and I said here goes nothing and it worked well the same power like when bought new . This has never happened to me ,just wanted to share . Before doing everything I did check the magnito . Thank you mower medic for your great videos they helped me alot to break apart my FS110 R and put it back together.

You can rotate the engine 1 time or 50million times as long as the arrow is pointing to the screw you’re good to go. The orientation of the arrow on the fly wheel stays the same, every time that arrow comes around the engine is it top dead center with the cam out. Put the camshaft in you would have two possible scenarios top dead center on the compression stroke or top dead center on the exhaust stroke Which would be easy to tell because the valve would be open

Thank you very much,MM1

The problem I'm having with those four mixes is not the camshaft wearing out but the axles for the cam and the cam followers wear out the engine case and the cover case and when this happens you might as well junk the engine because the Parts which include the whole cylinder barrel and piston and cover are worth as much as a whole unit

Did you make sure the engine was at TDC on the compression stroke and not on the exhaust stroke ? What gap did you set them at ?

😂good theory but your way off

@@THEMOWERMEDIC1 Feel free to correct me 🙂

It's plastic because it saves weight and is cheap to make.

Pitston is up

Up. TDC

Benefits are more power, less vibration less operator fatigue

Also more fuel efficiency and less noise, generally. I love these engines for the way they feel and sound, but you do need to be willing to put in the (very slight) extra maintenance to keep it in top shape. It's NOT hard to take off 4 screws and adjust the valves every once in a great while..

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I guarantee u do

@@THEMOWERMEDIC1 my cam was fine. Turned out my tank vent was bad. Your videos have refreshed my memory back when I got stihl certified a long time ago. Should be able to keep it running like a top now

I have no idea I work for a nonprofit organization

A wile back i came across a antique sthil 051 av electronic it was manufacturer in 1972 it did not run at all I had to apply my Magic Touch get it going got it going until the fuel line busted I was like oh man so I put it on the back burner for now got way too many lawn mower to work on this thing has a cast magnesium body you don't see those anymore

Heat, “string too long” lugging the engine.

I’d say heat and thermal breakdown. Those things run super lean! Thanks EPA!

This is the reason i prefer echos

@@victorrippe5845 amen, we have a whole fleet of 4mix trimmers n blowers where I'm employed and I'm always fixing something. JUNK, awesome idea in Theory but anything other than an edger or polesaw their junk otherwise.

@@jdclay1547 Yes man I totally agree Stihl went downhill with those 4mix junk I threw away thousands of dollars on them till I just gave up on them Echos little srm225 I garentee you will outlast any Stihl 4mix and it’s only a $219 trimmer it’s incredible I bought one of those little 225 4years ago man we have beat the living crap out of it and different employees use it and the thing still runs like a little champ I really under estimated those little units and man they sure hold up commercial work really well I never went below a 266 or a 2620 but hell it’s hold up with my big trimmers

I did no such thing

@@THEMOWERMEDIC1yes you did go back to the video 6.10 then watch to 6.20sec you clearly see you made a mistake and switched them over , go look

Any lawnmower shop near you is where you’d get parts

I explained it in the video you must’ve skipped over that part

I agree till you said 2 strokes have more power.