K Mac Posted January 13, 2019 Report Share Posted January 13, 2019 Hi folks I could do with some advice and help please I've got a Husqvarna chainsaw and it won't start it was playing up so. I put a new spark plug ,carburettor,fuel filter, fresh fuel and the air filter is clean. And the spark plug is sparking so all the usual stuff checked off. When trying to start after a few pulls I get what seems to be the ignition of the fuel gases that have built up in the exhaust and a puff of smoke. Not Anything like it trying to fire up then nothing till this happens again. I'm stuck anyone knows what the problem is? Thanks Quote Link to comment Share on other sites More sharing options...
panoma1 Posted January 13, 2019 Report Share Posted January 13, 2019 Not an expert with the ICE but if it has a spark, and wont fire, Would it be fuel? Quote Link to comment Share on other sites More sharing options...
yod dropper Posted January 13, 2019 Report Share Posted January 13, 2019 I seem to recall I had the fuel line in the tank come off once on my Husky . Quote Link to comment Share on other sites More sharing options...
ditchman Posted January 13, 2019 Report Share Posted January 13, 2019 if that was mine i would replace the fuel lines before going any further......... Quote Link to comment Share on other sites More sharing options...
amateur Posted January 13, 2019 Report Share Posted January 13, 2019 How long have you had it, and could the exhaust be blocked with oil and carbon? Quote Link to comment Share on other sites More sharing options...
Bazooka Joe Posted January 13, 2019 Report Share Posted January 13, 2019 Two screws on the side of the carb, screw them all the way in, then both out one full turn, then try starting it again. Quote Link to comment Share on other sites More sharing options...
walshie Posted January 13, 2019 Report Share Posted January 13, 2019 Take a look at the spark arrestor mesh in the exhaust. This can get blocked. i know it stops it running right, but if I don't know if it would stop it starting. Quote Link to comment Share on other sites More sharing options...
johnphilip Posted January 13, 2019 Report Share Posted January 13, 2019 39 minutes ago, ditchman said: if that was mine i would replace the fuel lines before going any further......... And the priming bulb check its not cracked . Quote Link to comment Share on other sites More sharing options...
Kalahari Posted January 13, 2019 Report Share Posted January 13, 2019 Huskies sometimes just lose the fuel pipe connection to the carb, if so that is just a push fit. David. Quote Link to comment Share on other sites More sharing options...
ditchman Posted January 13, 2019 Report Share Posted January 13, 2019 10 minutes ago, johnphilip said: And the priming bulb check its not cracked . well done....i forgot that.................i rekon 90% of all failures i have done on chainsaws and strimmers have been fuel lines and primer bulbs Quote Link to comment Share on other sites More sharing options...
K Mac Posted January 13, 2019 Author Report Share Posted January 13, 2019 Newish fuel line but will replace. no priming bulb so not that. the exhaust has been checked and cleaned. no spark arrest or on this one not that. bran new carburettor comes set to run and tried that with old one. new fuel running the same batch in other saw no problem. I can't fathom this one at all thanks so far Quote Link to comment Share on other sites More sharing options...
figgy Posted January 13, 2019 Report Share Posted January 13, 2019 Have you pulled the spark plug and tried pulling the starter to make sure your getting g fuel air mix to the chamber. It should come out the spark plug hole like a fog. Check the spark plug is sparking against the engine. After that and as others have said exhausts clear I'm stumped. Quote Link to comment Share on other sites More sharing options...
bornfree Posted January 13, 2019 Report Share Posted January 13, 2019 Has the flywheel key sheared causing the timing to be out? Quote Link to comment Share on other sites More sharing options...
ditchman Posted January 13, 2019 Report Share Posted January 13, 2019 try super flooding it............block the carb and pull it over............ Quote Link to comment Share on other sites More sharing options...
Ricko Posted January 13, 2019 Report Share Posted January 13, 2019 Take the plug out. Squirt some fuel down the hole. Screw the plug in. Pull it over. Does it fire and run after that? If not there's a chance that the diaphragm in the carb need replacing. Over time the diaphragms stretch and weaken due to petrol. Quote Link to comment Share on other sites More sharing options...
oneshot1979 Posted January 13, 2019 Report Share Posted January 13, 2019 Model of saw would help a lot. Early huskys are easy fixers, later stuff not so much. Quote Link to comment Share on other sites More sharing options...
johnphilip Posted January 13, 2019 Report Share Posted January 13, 2019 I had a problem with one i had , the guy who sorted it said i had flooded it he stripped it , and said never pull it on full choke more than 4 times . He said it kicks , but you can not always here it. I did as he said 4 pulls choke half in and it would fire every time . I got a sthil after that . Quote Link to comment Share on other sites More sharing options...
K Mac Posted January 13, 2019 Author Report Share Posted January 13, 2019 It's a 365 special made 2002 just pulled the spark plug out pulled it a few times no fog coming out just a slight smell of fuel will look at it tomorrow as wouldn't be popular running a saw at this time of night thanks folks keep the advanced coming Quote Link to comment Share on other sites More sharing options...
amateur Posted January 13, 2019 Report Share Posted January 13, 2019 2 more thoughts If you have had it a while, perhaps the crankshaft seals are leaking. Spray some easystart aerosol down the sparkplug hole and try again. That seems to start most engines Quote Link to comment Share on other sites More sharing options...
stuartc44 Posted January 13, 2019 Report Share Posted January 13, 2019 How long since it last ran? And I assume it is just run on petrol / oil mix. Quote Link to comment Share on other sites More sharing options...
oneshot1979 Posted January 13, 2019 Report Share Posted January 13, 2019 First things first, is there good compression? Quick field test is to place saw on floor and try to lift it by the pull start. Saw should lift from floor without pull cord coming out. If the saw starts to "bump" down the cord too fast remove spark plug and pull off the exhaust have a look in the port, and slowly pull the cord looking at the piston as it travels past the opening. If there is heavy scoring or blending of aluminium over the rings then it's time for a rebuild. Whilst the exhaust is off check to see that any spark arrestor fitted is not clogged. Next refit plug and spray a little fairy liquid around the decompression button and pull it over, any bubbles appearing mean a leak. After that assuming you have good compression try and start the saw, after ten or so pulls whip the plug out and have a look at it, is it wet or dry. If it's dry check the impulse line from the crankcase to carb for splits, any leak here will stop your carb from priming and therefore stop your fuel supply. As already mentioned a small squirt of fuel/brake cleaner down the carb throat and then pull it over will prove its a fueling issue. Also check your tank vent isn't clogged. If the plugs wet then check your carb settings, in to face and out 3/4 of a turn should get it fire and run with a bit of throttling. If not then you've deeper issues. Try it and let us know. Quote Link to comment Share on other sites More sharing options...
mick miller Posted January 13, 2019 Report Share Posted January 13, 2019 When my stihl did this it was a break in an electrical cable, didn't suspect a problem as both end contacts looked solid, check cables with multimeter, wiggle, test again. Quote Link to comment Share on other sites More sharing options...
CaptainBeaky Posted January 14, 2019 Report Share Posted January 14, 2019 Another one to try - especially off you have had the filter cover and/or the carb off - check you have got the carb and filter seals in place. If they are slightly mis-placed, the thing won't start. Don't ask me how I know... Quote Link to comment Share on other sites More sharing options...
Pistol p Posted January 14, 2019 Report Share Posted January 14, 2019 Ethanol in the petrol can cause fouling of the carb bowl and jets. Quote Link to comment Share on other sites More sharing options...
mellors Posted January 14, 2019 Report Share Posted January 14, 2019 Had the same with mine changed plug, ignition module, new carburettor kit, checked wiring and stop switch. Finally sorted new piston ring no compression. Quote Link to comment Share on other sites More sharing options...
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