No mix in 2T machine

[Jack.P]

Just found out there was a mix up the other day and been running brand new Stihl long reach hedgecutter  on normal unleaded (run for about an hour and a half ) it didn’t sound quite right but didn’t realise at the time about the wrong fuel as 4t had been put into the 2T can 🙄

it seems to run ok but could this have done much damage to the engine and what should be done before running it again

Thanks for any input.

Jack

Edited February 22, 2021 by Jack.P
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[openspaceman]

21 minutes ago, Jack.P said:

Just found out there was a mix up the other day and been running brand new Stihl long reach hedgecutter  on normal unleaded (run for about an hour and a half ) it didn’t sound quite right but didn’t realise at the time about the wrong fuel as 4t had been put into the 2T can 🙄

it seems to run ok but could this have done much damage to the engine and what should be done before running it again

Thanks for any input.

Jack

Very unlikely not to have done some damage. Pop the exhaust off and have a look see if the ring is free in the piston and no smearing or scoring, it nearly always affects the exhaust side first.

 

You may be lucky and with fresh petroil in it it will run but take it gently.

[Stubby]

54 minutes ago, Jack.P said:

Just found out there was a mix up the other day and been running brand new Stihl long reach hedgecutter  on normal unleaded (run for about an hour and a half ) it didn’t sound quite right but didn’t realise at the time about the wrong fuel as 4t had been put into the 2T can 🙄

it seems to run ok but could this have done much damage to the engine and what should be done before running it again

Thanks for any input.

Jack

You have got the title of the thread wrong .  It should read No Mix .

[Jack.P]

25 minutes ago, Stubby said:

You have got the title of the thread wrong .  It should read No Mix .

That’s what it said 😀 must be getting old ...

Anyway I suspect there is some damage to a certain extent.may take it for a mechanical written report 

[Lowestoft Firewood]

I know of someone who ran their 2 stroke kombi on unleaded for weeks 

 

Was fine 

[Jack.P]

Interesting but hard to believe they got away with no engine damage  .was that anything like the new HL94 unit ? 

[Wonky]

I'd say if you take it to someone, ie a dealer, they will condemn it, as it may well be on the lower side of compression. 
If you take it to someone who’s prepared to put some love to it, you may find a light hone and new rings, maybe a piston. then it could be ok..

 it depends on if  and how much Ali transfer has occurred.

 

we had a strimmer where someone straight gassed it, and used 1/2 a tank. all was good once std mix was used. But the strimmer went down hill on the compression and it wouldn’t tick over after a few weeks, there was  no transfer when I looked through the exhaust , but a hone and new rings got it going. 

[Stubby]

1 hour ago, Jack.P said:

That’s what it said 😀 must be getting old ...

Anyway I suspect there is some damage to a certain extent.may take it for a mechanical written report 

Sorry , could have swarn it said wrong mix ...

[Jack.P]

5 minutes ago, Stubby said:

Sorry , could have swarn it said wrong mix ...

No wrong mix here ...😁

[openspaceman]

3 hours ago, Stubby said:

You have got the title of the thread wrong .  It should read No Mix .

He took your advice @Stubby because the thread I replied to was "Posted in Wrong fuel mix"