What the fuck can have caused this? Am I not getting enough oil or fuel?

What the fuck can have caused this? Am I not getting enough oil or fuel?

...

well as it looks like its picked up on the bore and skirt, imma say not enough oil

overheating... blown headgasket?

but why would overheat?

Any number of reasons can cause overheating

It ran nicely until suddenly the engine temperature shot up and I lost all compression in one of the cylinders.I think one of the injectors must have clogged or something and it ran dry. The piston rings seem pretty burned. I had a shop rebuild this engine 300 miles ago.

It's a 2 stroke snowmobile engine btw.

name 4

Using too thick of an oil.

If its just that piston skirt looking fucked id start with the injectors, spark plug/ coil and valve train. Maybe even the lobes on your camshaft for that cylinder are worn and cause the valves to lag causing over-compression.

lots of shit that could potentially be the problem.

>valve train
kek
>lobes on your camshaft for that cylinder are worn
double kek

Didn't even see it was a fucking 2 stroke....

It ran super lean, probably caused it to overheat

timing
exhaust
lean tune
cooling system clog
cooling system leak
low oil
low coolant
fan not working
water pump impeller problems
missing belt

HEAT

This guy knows. Did you run the proper mixture? Looks like it was dry as hell in there. I can't see any oil residue anywhere.

Well I only asked for 4 so I'm not giving any credit for the other 6.

You didn't use premix. No oil.

Checked the other pistons/walls?

It looks like it ran dry of oil. Overheating usually makes more deformation and flaking

>oh nooooo.jaypeg

No need for premix.

On a 2 stroke? Doubt Is had

you do

The other cylinder and piston looks fine.
The engine has a oil pump and a seperate oil tank.

Well that sounds like your problem. Is it a moped? The oil pumps fail on those all the time. Highly recommend you run premix from now on.

...

Never trust an oil pump on a vehicle like that

My point still stands.

The fucking company that rebuild the engine went "bankrupt" And the same fucking guys started another company in my town and legally there's nothing I can do about it.