myuserid Posted October 2, 2007 Report Share Posted October 2, 2007 I'm in the middle of cutting a tree down, but have a problem with my chainsaw. It starts and runs ok for the first 10 minutes, then it will start to get slower and slower then it cuts out. It will idle all day, seems to be only when you power it up a bit. I have done the following: Removed fuel filter & washed with petrol Replaced 2 stroke fuel (25:1) used a measuring can so its the correct ratio Checked the spark plug (was black and had black oil round it) The air filter had a small amount of two stoke fuel in it, is the normal? Thanks Quote Link to comment Share on other sites More sharing options...
benbaikal Posted October 2, 2007 Report Share Posted October 2, 2007 have you tried cleaning the exhaust out might be struggling to breath Quote Link to comment Share on other sites More sharing options...
Axe Posted October 2, 2007 Report Share Posted October 2, 2007 Sounds like its running too hot. But for the best advice, PM JJaxeman, he is a guru of all things chainsaw. Quote Link to comment Share on other sites More sharing options...
auto culto Posted October 2, 2007 Report Share Posted October 2, 2007 have a cup of tea every 10 mins Quote Link to comment Share on other sites More sharing options...
al4x Posted October 2, 2007 Report Share Posted October 2, 2007 Sounds like its running too hot. But for the best advice, PM JJaxeman, he is a guru of all things chainsaw. the running hot would make sense as 10 minutes is a long time to run ok if it's a fuel supply problem. Black and oil on the spark plug etc may be a sign its running rich. I'd play a bit then run it into a specialist for a look as there's nothing more frustrating than a saw stopping all the time Quote Link to comment Share on other sites More sharing options...
myuserid Posted October 2, 2007 Author Report Share Posted October 2, 2007 How old is it ? how much work has it done? as 2sroke engines the get hot and loose power quickley, it might be worth changing the piston rings as a lack of compresion has the same affect as you discribed hope this helps cheers Kev H O that advice sould cost you a donation to LBs charity bash This is the annoying thing, its about 12 months old and has only done about 20 minutes work. This is the first time I have actually used its for 10+ minutes. Quote Link to comment Share on other sites More sharing options...
al4x Posted October 2, 2007 Report Share Posted October 2, 2007 what make is it? Quote Link to comment Share on other sites More sharing options...
Axe Posted October 2, 2007 Report Share Posted October 2, 2007 I've just realised that JJ is on holiday for a week. However, I spoke to his colleague who has said its possibly the Diaphram in the carb. If its been standing that long, it may well have perished or split. I'd take to an aurhorised service agent and have it looked at, before you damage it severely. Quote Link to comment Share on other sites More sharing options...
robbsy Posted October 2, 2007 Report Share Posted October 2, 2007 may be worth a try at diluting the 2 stroke mix as it may be oiling up. i have a stihl chainsaw which runs on a mix of 50.1 and you are using 25.1 Quote Link to comment Share on other sites More sharing options...
myuserid Posted October 2, 2007 Author Report Share Posted October 2, 2007 I have just bought a new husqvarna from worldofpower, wanted to but a stihl but they have restricted internet sales, seems fairly stupid as I can buy other makes, their loss! Anyway if any of you are interested, this one its for sale make me an offer, 20-30 mins use, just checked the purchase date 13th march, cost £109. I can arrange UPS delivery for £15, pics below: Chain has got to be worth a tenner! Quote Link to comment Share on other sites More sharing options...
Axe Posted October 2, 2007 Report Share Posted October 2, 2007 Think you have been a bit quick to jump at an internet sale. Stihl are one of the finest saws available and the approved service centres are very well run. The reason they have cut back on internet sales is so they can concentrate on ensuring the brand name is at one with quality and service. Quote Link to comment Share on other sites More sharing options...
leeboy Posted October 2, 2007 Report Share Posted October 2, 2007 Try adjusting the mixture, you will probably find that sorts it. Quote Link to comment Share on other sites More sharing options...
myuserid Posted October 2, 2007 Author Report Share Posted October 2, 2007 It said 20:1 first 20 hours, then 25:1 thereafter, so I was using 20:1, switched over to 25:1 still the same. The manufacture says 25:1 so thats what I'm running it at. Decided to buy a decent chainsaw as I have a few large trees that need lobbing and I doubt this one could have handled it Quote Link to comment Share on other sites More sharing options...
al4x Posted October 2, 2007 Report Share Posted October 2, 2007 you won't regret it, the huskies seem to take a little more maintaining but generally are slightly more powerful than the stihl equivalent. Its probably the mixture on that saw as its new but who knows the problem you'll have is chainsaw dealers won't want to deal with it as parts will be a pain to get and its not what they're used to. Quote Link to comment Share on other sites More sharing options...
baikal boy Posted October 2, 2007 Report Share Posted October 2, 2007 i work with chainsaws most days of the week felling and carving and it could mean the carbs not set write you can do it yourself if you no wat your doing or if its still under garantee theyl do it at the shop you bought it from i dont think they would charge you much anyway even if it wasnt.or could be overheating like was said before. paddy. Quote Link to comment Share on other sites More sharing options...
myuserid Posted October 2, 2007 Author Report Share Posted October 2, 2007 Would anyone recommend running it on normal unleaded for a few seconds would that flush it? Could do with this chainsaw tomorrow as my new chainsaw is going to take a few days to arrive and have a tree half cut Quote Link to comment Share on other sites More sharing options...
al4x Posted October 2, 2007 Report Share Posted October 2, 2007 no definitely don't run it without 2 stroke oil, you'll wreck it very fast Quote Link to comment Share on other sites More sharing options...
myuserid Posted October 2, 2007 Author Report Share Posted October 2, 2007 So what do you think, 50:1 instead of 25:1 Quote Link to comment Share on other sites More sharing options...
al4x Posted October 2, 2007 Report Share Posted October 2, 2007 nope 25 to 1 if that is what it says in the instructions. too much oil will just make it smoke a bit rather than causing your symptoms after a few minutes work. Either the saw has a fundamental issue or its a carb problem. If you've the manual it may give some carb set up info in it you may find you can make small adjustments and get it running ok. Or nip it down to your local mower repair place and I'm sure they'll have someone who can play with it Quote Link to comment Share on other sites More sharing options...
Pushkin Posted October 4, 2007 Report Share Posted October 4, 2007 Is there not a website link in the manual you got with it? Most of these companies do good support service via websites these days Pushkin Quote Link to comment Share on other sites More sharing options...
myuserid Posted October 6, 2007 Author Report Share Posted October 6, 2007 Wright been havind a think about this( old 2stroke motercycle spanner man) DO NOT RUN WITH OUT 2STROKE OILfirst of all you run for 10 mins cuts out which would surgest loss of compresion (which may have been true but not likely as it is new) BUT COULD STILL BE A POSS What colour is the spark plug It should be DARK BROWN - BLACK IN HIGH PERFORMANCE 2STROKES WE ALLWAYS run them rich to prevent ceasure this was governd by the main jet and kneedle in the carbretter and air flow mixture screw and the last thing could be the spark plug is breakeing down under pressure If i was you i would 1) take out the spark plug cheque colour that tells you if it is running correctly mixture to fule ratio) and replace with a new one ") blow the carb through with compressed air be carfull not to much pressure if there are diophrams in there ( this will clear out anybits in the carb bole, main jet or float kneedle ) It could be that the float is set to low causeing fule starvation any way good luck let us know how you get on cheers I had a look at the spark plug and its covered in black oil, the engine has only got to be running for a few seconds and it turns black. It cuts out when I increase the speed of the engine once warmed up. I dont have any compressed air and dont really want to mess around with the carb. Quote Link to comment Share on other sites More sharing options...
berettaman1 Posted October 6, 2007 Report Share Posted October 6, 2007 I too had years riding and racing two strokes, if you say the plug is black and wet, and cuts out when you open the throttle then it could be the choke is fully on I E the cold starting mechanism, which would flood the engine when the throttle is opened, check that out first. Quote Link to comment Share on other sites More sharing options...
myuserid Posted October 6, 2007 Author Report Share Posted October 6, 2007 I took it to my local garden machinery shop and they say its either fuel or carb and the piston rings should be fine, it was going to cost £45 for a check up then £20 for carb adjustments, not worth it so listed on eBay. Had a look I'm sure its not the choke. It now ticks over fine but as soon as you power it up it cuts out, so could be a fuel problem. Its now listed on eBay so if you fancy a go at fixing it feel free to bid! I have a Husqvarna turning up on Monday so I can now finish off last weeks job Quote Link to comment Share on other sites More sharing options...
peter-peter Posted October 6, 2007 Report Share Posted October 6, 2007 I'm in the middle of cutting a tree down, but have a problem with my chainsaw. It starts and runs ok for the first 10 minutes, then it will start to get slower and slower then it cuts out. It will idle all day, seems to be only when you power it up a bit.I have done the following: Removed fuel filter & washed with petrol Replaced 2 stroke fuel (25:1) used a measuring can so its the correct ratio Checked the spark plug (was black and had black oil round it) The air filter had a small amount of two stoke fuel in it, is the normal? Thanks sounds like mixture adjustment, turn the mixture screw in clockwise, untill it starts to tighten turn it out 1 1/4 turns. srat the engine on choke and when running push choke in.if it stalls open up anti clock slightly and repeat. when you get it going and warm run on 1/4 throttle and adjust screw either way untill a smooth run is obtained. the plug should be brown black is overich white is too lean turn clockwise to lean anti clock to richen. if this doesn't work shoot the ******. Quote Link to comment Share on other sites More sharing options...
myuserid Posted October 8, 2007 Author Report Share Posted October 8, 2007 Got my Husqvarna this morning seems ok, would have expected slightly better quality from husqvarna but anyway. One of the things thats a bit annoying is that the bumper spike is an optional extra, for me thats one of the most important things. So, if anyone knows where I can get parts or if you have a spare spike let me know Quote Link to comment Share on other sites More sharing options...
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