Husqvarna small chain saw won't stay on and now won't start

Mitch:

Adjust the fuel and air mixture screws while the saw is running... you'll find that "sweet spot"... it just takes a little patience! Small adjustments... If you over adjust and the saw quits running or starting, GENTLY turn both screws in all the way (don't damage the needle valves or seats) and turn both out one and a quarter (1 1/4) turns out. The saw should start, then adjust from there.

Faulty crankshaft oil seals.

if it is hard to start and smokes sounds like the fuel is to old and the oil to gas mixture is wrong start off with some fresh fuel gas is only good for 30days in small engines

Had this happen to mine when I was limbing stuff that was too small. I know better. There is probably a burr on one or more of the guide portion of the links where they run in the bar. This causes that link to be tight in the bar at this point. The chain probably hit something on the body of the saw when it flew off. Take the bar off the saw and run the chain through the groove in the bar. If you have any links with nicks, they will bind, causing the chain to stick and not run freely. Once you've identified the problem links you can remove the nicks using 120 grit paper backed up with a flat piece of steel so you only remove the high spots.

Does the brake seem to 'snap-over' like it should? Pull it back to release position, and remove the drive cover. Check the entire brake for debris accumulation or bent/damaged brake band. Check the chain to see if it is being oiled. Remove the bar/chain and clean the entire assembly, particularly the small oil passages in the drive end of the bar. Start the engine and watch for oil oozing out of the small side port where the bar fits. If ok, reassemble the bar/chain. If no oil comes out, investigate the oil pump, lines, and filter/valve in the oil tank. Mount the side cover, but leave the fasteners finger tight. (The chain teeth cut toward you on the bottom run) Tighten the chain until the lower run comes up to the bar, but can still be turned by hand. Tighten the fasteners and recheck the tension. Trip the chain brake and make sure it locks the chain, then release it and make sure it turns freely. Check the chain oiling by running the bar tip at speed near some cardboard--it should leave a thin line of oil on the board. Hope this helps!

Take the bar and chain from the saw. Clean the two small ports that run from the large oil holes at the drive end of the bar out to the chain groove on each side. Clean the entire chain groove. Start the engine with these parts removed--oil should ooze out from the side port in the engine case with the engine running at med speed. If it doesn't, then there is trouble near the pump inside the case. When everything is back together, run the saw at full speed with the bar tip near a piece of cardboard--it should throw off a thin line of oil onto the cardboard after a few moments of running. Hope this helps!

Hello,

some times this can be something easy sometimes not just follow a few simple steps:

Have you replaced the bar and chain recently?

#1 Remove bar and chain and blow out all sawdust esp around your bar studs dont get to close with the air as you can sometimes pop seals...

Start your saw see if oil comes out around bar studs if so the oil holes in your cutter bar may be blocked...

#2 If that doesnt work remove your oil filler cap and use a piece of wire with a bend on the end to remove your oil filter remove it from oil line and clean in fuel and blow out with compressed air replace on hose and place back into tank and try start chain saw again...
if that doesnt work then take it in to small engine repair shop as the pump may be blocked or unservicable and need replacing

Hope this Helps

Kind regards
Brad

First off, take off the bar and chain, clean up the grooves and the small oiling holes in the bar. Then without the bar on, start the saw, see if oil comes out of the oiling hole, if not, dump the oil out of the saw, put some gas in, rinse out well, spray brake cleaner works well, too. Refill with oil and see if its oiling yet, make sure to check if it has an adjustable oiler, open it up a bit if need be. Use only bar and chain oil, not car oil!

Turn the Hus 345 chain saw upside down, you may see a little Icon of a oil droplet and a + - arrow by the chain. THe adjustment screw is not pictured in any of the standard user manuals,. but it is a small black slot headed screw over a rectangale metal tab by the chain. I believe if you turn it counter-clockwise, it will give you more oil,, It did for me. If you have the bar off, you can start the saw and see it come out the hole, that would verify your oil pump is working. Make sure the holes on the bar are clean also. running the saw at a fast idle for 1 min should oil the chain well enouth that it starts spraying off the end of the bar when you gun the engine.

Replace the bar. Your bar has gone bad and that is why you are losing power. Bars are made by the chain saws to be completely oiled at all times. When the bar does not get oil the bar will start to warp and that is what will cause you lack of power when trying to due a top cut