STIHL FS 80 BLOWN TOP AND AND CAUSES OF FAILURE

[@THEMOWERMEDIC1]

too much load on engine.....for each inch of line past the line cutter makes the engine temp creep 20-30 deg.....it also makes the clutch slip and that also generates a temendous amount of heat

[@THEMOWERMEDIC1]

lower octane "87" lacks the the resistance to burn thus causing preignition and higher octane resists those hot spots in the cylinder and keeps from spontaneously cumbusting before the spark plug does...i said nothing about power output....a lean mixture will indeed raise the temperature of any engine regardless of octane ratng used.

[@bradleydunford4350]

I have a fs80 string trimmer and once warmed up shut it off to trim and edge back yard it's hard to start back up but it does start

[@1anthonybrowning]

Thanks, I bought a carb to put on mine (no kit avail) and if its still bad after I put it on I'll know what to look for.

[@MHolt3573]

What should the compression be on a FS80?

[@wtbm123]

You always have good videos with helpful information.

[@TheJf5432112345]

Do you have a video that shows how to replace the seals? I have an echo that is wet around the exhaust. I looked at the piston thru the port and it looks great for now. Echo gt 2000 i think is what i have.

[@JohnMillerwashere]

Great videos as always, just wondering why not having a guard on the trimmer head would cause it to overheat?

[@jessicamckinney7508]

My piston has actual carbon buildup on it. Have compression and it runs good for 10 minutes then starts stalling and bogging down and quits. I have replaced everything else and it still gives me problems. Is the piston causing these problems. It's symptoms are the exact same as if the spark arrestor was clogged

[@mrscubaman66]

Hey, Jeremy whats the cost on a new top end just parts

[@goldenboy8951]

i need help, i have the same trimmer and its giving me problems! its always hard to start up sometimes even when the engine is hot! Than when its running for a long time out of know where the engine dies , and its a pain to turn it back up! i noticed that i didnt mix my oil good this last time, could that be the failure! please respond! i love my fs80 but i might just buy the fs90 if i cant find the solution soon..

[@Budro4764]

Hey Mon Ami I know this is a older video, but I'm trying to get with you on a part on that stihl ........... I need the the barrel and e clip off of the carb throttle plate....... It's the part that the cable pops in and holds it ....... You still got that carb or one from a 85 ?? Mine is a 85 Merci for a reply ~!~!

[@mAdAsZaC]

hey jeremy i have a cheapish chainsaw that has a scored piston and the rings are bad but the bore is good if i can measure up the piston could you help me find a place to order one? its a cheapish chainsaw but its to proove a point (plus i have been told if i can get it going i can have it)

[@velox731]

Thank you for the informative video, your doing an awesome job! We do appreciate it.

[@bradleydunford4350]

My fs80 is hard to start when it's hot. I cut and trim front grass go around back to cut and trim back yard and the trimmer is hard to start back up what could cause this problem and I run 93 in all my stihl products thanks

[@THEMOWERMEDIC1]

About 80 dollars

[@mAdAsZaC]

The flywheel is a fan, the fan is blowing the wrong way and does not cool the cylinder and head when its not shrouded

[@jeremylandphier692]

That's why battery is taking over !

[@faaeetiatofa3936]

Problem with fs stihl gasket blown

[@faaeetiatofa3936]

Blown gasket

[@malfaro4]

Excellent vidizo as always buddy, Very helpful !!

[@JohnMillerwashere]

Good to know, Thanks

[@rellmonger7935]

High Octane gas I only use

[@SoyMagnumOpus]

I'm using 93 octane with saber professional at 80:1

[@THEMOWERMEDIC1]

NOPE!

[@richardfitz2040]

i have an fs 80 and it cranks up...runs... idles. But its blowing white smoke bad. what would be the common problem with that.

[@faaeetiatofa3936]

Problems with fs stihl gasket blown

[@mAdAsZaC]

its worth fixing when the labour pays the bills :P

[@bobhumplick4213]

i always run 93. i can tell a difference

[@zx8401ztv]

lol :-) Another thing that decides is the country you live in, the uk seems too dam expensive for parts, too much bloody govenment tax added to everything. So sometimes its cheaper to scrap it, its sad, i dont like scrapping stuff :-((

[@jamesmalone646]

zx8401ztv somebody said that a weedeater blew up while they were using it causing burns on his arm. I dont believe it. What do you think?

[@666mrjimbo]

WHEN THE CYLINDER AND PISTON GETS THAT BAD IT WOULD COST AS MUCH TOO BUY A NEW MACHINE THEN TO REBUILD IT ESPECIALLY ON WEED EATERS! THATS MY OPINION ESPECIALLY WITH LABOR COSTSUNLESS OF COURSE ITS A $300. WEEDEATER

[@zx8401ztv]

Oh dear, piston/rings/bore all have to be replaced :-( Crank cases split and crank seals + gaskets replaced :-( Dont sound worth repairing jeremy :-(

[@raymorgan7177]

My FS 80 runs stalls under work load.125 compression