slim_boy_fat
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Chain and an engine hoist? Unless you have a mate/neighbour with a small digger [or JCB]?
- Thread starter Kram
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Chain and an engine hoist? Unless you have a mate/neighbour with a small digger [or JCB]?
Kram
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Done may more holes, the borer siezed after a couple mins of full throttle, Im guessing overheated?! looking down the ports the piston is scored. Gave it some oil and a wiggle, it turns freely. Will it do any damage if I continue to use it? or best to get a new piston kit? will I need new barrel?
Need to do 3 more big holes this week. We have done 2 big ones and about 20 small ones.
Thanks.
Need to do 3 more big holes this week. We have done 2 big ones and about 20 small ones.
Thanks.
I presume it is a t/s?, did you use premix fuel?.
Kram
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Yes and I know nothing about them 
The instuctions say 25:1 so I measured 500ml petrol to 20ml 2T oil, shaked in a small bottle and half poured in the tank. I think it might have overheated but Im told it must have been running lean. Some of the bolts were starting to rattle out incliding the intake so thats possible..
I want to run it, not sure if good idea?
I dont know what size piston and bits will fit, very tempted to pull the barrel bit I will need a piston ring tool and new gaskets to get it back on?
The instuctions say 25:1 so I measured 500ml petrol to 20ml 2T oil, shaked in a small bottle and half poured in the tank. I think it might have overheated but Im told it must have been running lean. Some of the bolts were starting to rattle out incliding the intake so thats possible..I want to run it, not sure if good idea?
I dont know what size piston and bits will fit, very tempted to pull the barrel bit I will need a piston ring tool and new gaskets to get it back on?
Take the head off and check the bore, if it's not marked/scoured and there are no bits of piston stuck to it you may have got away with it, fit a new head gasket and torque it down. Just take it a bit easier with it, only rev as high as you need to do.
angellonewolf
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dont remove the head yes you will need gaskets and be a pig to get back together if the bore is scored you prob have not used the right fuel mix and is not gettting the right mix and yes that will score the bore is it black in the bore ?? if so its burnt the rings and is for the scrap heap will need a new head and pistion and rings
if its still turning ok get your self a proper mixing bottle and get the right fuel mix and you poss might get away with it
if its still turning ok get your self a proper mixing bottle and get the right fuel mix and you poss might get away with it
angellonewolf
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I don't personally trust the 'proper' mixing bottles...
I use a kitchen jug thing with the graduations on the side to measure the petrol, and a syringe to measure the 2t oil.
Don't listen to what I say though, I don't do it very often so I probably don't know what I'm talking about
(I do 5 litre batches, that lasts me a few full days - had one strimmer running off my mix for 3 years now, petrol long reach hedge trimmer 18 months, another strimmer just over a year, couple of seasons with a blower, sporadic usage of disc cutter and chainsaw - oh, and everything gets 40:1(5,000ml petrol : 125ml oil) whatever the cap says and lives with it because I cba messing with different mixes)
if @pdg uses that much 2 stroke take his word for it i dont use that much i only run hedge trimmer, grass trimmer 2 mini motos and do fixing on 2 stroke items that come my way as a hobbie for fun and to cut the grass
still stick by what i say on the mixing bottles if your not using that much you can leave in the bottle and shake it when you need it and it mixes the oil and fuel back up before your using it
as above if the unit still pulls and the pisten goes up and down freely might be worth a try with a proper fuel mix
and yes to much oil makes it hard to start fowls the plug and dont do the carb any good and possable does not do the bore any good but if got more oil in cant see that would damage the bore just make it hard to start and such
dobbslc
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If it's a new machine you could just return it.
Not sure what Stihl are doing by suggesting you put double the oil in if it not their own brand! Maybe they want you to foul the thing up as punishment for not spending your money with them
You must use good quality oil and not something from the local petrol station, I use Castrol 747 synthetic racing oil, a bit over the top but I have some left over from my racing days and it smells lovely!
As for the seized engine if it turns over ok them see if you can get a head and base gasket first then pull it apart and see if the piston is ok, a bit of scuffing is fine if it's not too bad just clean it up with some energy cloth. Clean the melted alloy off the barrel with some spirit of salts, it dissolves alloy but won't touch the steel liner careful though it's strong stuff! You won't need a piston ring tool for this just some decent finger nails! Make sure they go back the right way up, look at the ring ends where they meet the piston ring pegs they are shaped to fit one way only. Careful with the rings as they are easy to snap!
Get some racing two stroke oil the extra cost is worth it just for the smell
Not sure what Stihl are doing by suggesting you put double the oil in if it not their own brand! Maybe they want you to foul the thing up as punishment for not spending your money with them
You must use good quality oil and not something from the local petrol station, I use Castrol 747 synthetic racing oil, a bit over the top but I have some left over from my racing days and it smells lovely!
As for the seized engine if it turns over ok them see if you can get a head and base gasket first then pull it apart and see if the piston is ok, a bit of scuffing is fine if it's not too bad just clean it up with some energy cloth. Clean the melted alloy off the barrel with some spirit of salts, it dissolves alloy but won't touch the steel liner careful though it's strong stuff! You won't need a piston ring tool for this just some decent finger nails! Make sure they go back the right way up, look at the ring ends where they meet the piston ring pegs they are shaped to fit one way only. Careful with the rings as they are easy to snap!
Get some racing two stroke oil the extra cost is worth it just for the smell
8ob
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I dont buy Stihl oil either, we get through so much of it I buy in 20ltr tubs and double up. The info in this http://www.stihl.com/fuel-mix.aspx
worked out as a percentage its still only a trace of oil.
Bob
The gear we use is unbranded but never had issues with it in over twenty years and our saws get a proper hammering
angellonewolf
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half good quality oil same for small engines as it is for your car you would not put cooking oil in your car why do it on your tools
Kram
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Its not even 5 minutes, it will do a 8" 900mm deep hole in about 30 seconds. Bloody amazing tool, strongly recommended. With the ground I have here, hard clay, it would take hours with normal tools.
Kram
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About to try running it, will get a pic of the piston first.
As theres no head, the base gasket is the green gasket paper type which I assume I can make up myself as I have some or cornflake packet if I didn't?
I assume not a problem on a chinese, most stuff is made there these days, is it worth me inspecting the crank?
I did measure it accurately, first weighted the bottle up to the line with water then dried it, 2T oil used a syringe as I got a box of 50 for doing brakes need to use them up somehow! The oil was from screwfix, cheap 4 quid litre bottle.
As theres no head, the base gasket is the green gasket paper type which I assume I can make up myself as I have some or cornflake packet if I didn't?
I assume not a problem on a chinese, most stuff is made there these days, is it worth me inspecting the crank?
I did measure it accurately, first weighted the bottle up to the line with water then dried it, 2T oil used a syringe as I got a box of 50 for doing brakes need to use them up somehow! The oil was from screwfix, cheap 4 quid litre bottle.
angellonewolf
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that will do but gaskett paper is better
