It appears my Troy Bilt weed trimmer is seized. I'm considering injecting either Kroil oil or Marvel Mystery Oil through the spark plug hole. Which do you think would be better?

A new trimmer would be money better spent compared to all the work and money you've dumped into this one. If it's seized, it's junk.

__________________
Current stable:
1995 E320 149K (Nancy)
1983 500SL 120K (SLoL)

Black Sheep:
1985 524TD 167K (TotalDumpster™)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

Oh come on, this trimmer has provided me with hours of entertainment trying to figure what the h*ll is wrong with it!!

I'm thinking the Kroil will work the best........

Kroil. Good luck.

Ugh. Two strokes. You’re in for a treat if you find them entertaining. You’re going to have to pull the cylinder, and probably replace both piston and cylinder.

If this is the TB575 you've been posting about in other threads, it's an absolutely appalling POS. I have one at the office and every time I have to use it, I think about leaving it in front of the building "accidentally".

At the house I have an ancient TroyBilt 4-cycle trimmer from the late 90s with a Honda engine on it, and that thing is bulletproof. Talk about something with BALLS. Too bad it weighs about as much as a small moon. This new crap they sell is just rebadged Ryobi with a higher price tag. Low power, absolutely no torque, plastic camshafts that strip out or melt, flimsy shafts that wobble. It's an insult to the TroyBilt name.

__________________
Current stable:
1995 E320 149K (Nancy)
1983 500SL 120K (SLoL)

Black Sheep:
1985 524TD 167K (TotalDumpster™)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

Kroil, those who don't know it won't agree .

__________________
-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better

It's a 4 cycle engine, I'm thinking the Kroil won't hurt anything???

Kroil absolutely will not hurt anything .

I recently used it to unstick an engine that became stuck from sitting unused .

__________________
-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better

A couple years back I bought a battery electric string trimmer.

I will never own another gas one again. Ever.

__________________
617 swapped Toyota Pickup, 22-24 MPG, 50k miles on swap

Same here. The gassers need ethanol free to keep the engine alive. Might as well use electric rather than deal with the hassle and cost.

__________________
Greg Schwall

1983 300SD - 465,000 miles

Put some Kroil in through the spark plug hole this morning. I'll let it sit overnight and try turning it over tomorrow.

When I was little I had a car door slammed shut on my hand. I still remember it quite vividly.

Me too in our then new 1959 IHC Travelall, it was horrible .

In Massachusetts no less .

? What does hands slammed in vehicle doors have to do with this thread ? .

I'm old and easily confuddled .

__________________
-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better