Chain Saw Problem

Hi Roger
If you have changed the plug Is the spark plug reach too long and / or build up of carbon floating around

greenant

Most of these things have a compression relief valve that release the compression to allow easier starting, maybe it's blocked or stuck.

hi
it appears to me that the chain brake is jammed on??????
check it out!!!!!
mazcan barry

Does sound like the spark plug hitting the piston- too long wrong plug.

Cheers
Dave

Thanks everyone. I've removed the chain brake,and the problem still exists. The spark plug fitted, is the exact same one the saw was operating with until recently Plus, I put a rubber bung over the spark plug hole, and I still had the problem.That leaves the decompression device......all I have to do is find it, if one exists. It definately sounds like it might be the problem though. Thanks again everyone. I'll let you know the results. Cheers.

Roger B....

Hi roger,
blocked Exhaust, robber wasp love that

Hi Roger, sound like there is something amiss in the recoil starter mechanism.
Something might have brocken and gotten jammed.
Regards, Bruce.

Perhaps yo should take it to a chain saw mechanc.

throw it away and buy a stihl

That might just happen yet.

Gday Roger,
Buggered Spark Plug
Buggered Lead
Blocked filter
Old fuel
Not enough choke
Too Much choke
Crap in the fuel system ( carby etc )
Not pulling the cord hard enough
Not turned on
.................................
All of the above?????????????


Sorry mate.........But when cheap small engines dont work and you cant fix them yourself......throw them away...thats how they were designed .. and they will cost you more to send in for repair than they will to replce.

Good luck
Hairy

hi roger b
not sure whether i should stat another blog or add to this one as you may never see this now

after re -reading what you have done re talon chainsaw motor problem

i'm convinced the exhaust valve is carboned up to the point where the valve stem is jammed shut hence this is why you can get it to turn over with the spark plug out you proved and know it's not the plug but when replaced with a rubber plug in the plug hole it would;nt turn over
because simply the exhaust valve is not opening and when the plug is out it's using the plug hole as an alterative escape route i know the suggestion about a decompresion valve or lever does'nt apply to all single pot motors
they are only used in multi pot larger engines or older type diesels single pots that had very large flywheels on them and were hard to crank allowing one to wind it over then release the decompression lever in order for it to fire if you decompress a small single pot2 stroke motor such as a chain saw or simular while trying to start it,
it will never start in a million years simply because it's a single pot 2 stroke and needs compression to to make it fire also does'nt have a heavy flywheel to keep it rolling over between rope pulls
single pot engines have a habit of building up carbon on the ex valve stems and when you stop them hot the extreme heat from the motor has in the past burnt in the ex valve port/stem area and siezed many vlaves on chain saws /wipper snippers/ and briggs& stratton type motors they are notorious for it
think back to the last time your motor ran did you turn it off or did it stall stop either way the exhaust valve could till be jammed in the closed postion with carbon build up and it may have a broken a valve liffter and or camshaft on the exhause valve hoping htis trows a new light on the problem chers
mazcan barry

Thanks again Gents. Especially Mazcan Barry for that lengthy report. I think you've hit the nail on the head. I've got this thing stripped down of its casing and tomorrow I'll finish.The exhaust is clear,the starting mechanism is separated and fine, as previously said, there's no compression valve. So I'm betting on the exhaust valve now.If that is the case do you know if replacement parts are readily available, or is it more likely to be a job for the tip. Maybe a new saw. Cheers.

Roger B....

G'day Roger B, I have a small Talon 2 stroke chainsaw and apart from replacing the2 spring loaded pivoting lugs in the recoil start mechanism, have found it to be robust and reliable. The parts were readily available and cost about $15.00. Your problem is perplexing, however I will put my money on the compresssion release mechanism and I would be surprised if it does not have one.Lawnmowers have them and they look like a mushroom screwed into the motor block. I suspect they house a spring loaded diaphragm which closes up once the motor starts. If you have a 4 stroke motor, the problem is most likely with the valves and in my opinion not worth repairing if the saw if getting short in the tooth, unless you are prepared to do a complete reconditioning. Regards Pauper.