Husqvarna
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This sounds very much like a blocked fuel tank breather, when the saw dies quickly slacken off the fuel cap, if it picks up again it is the breather, the breather is on the r/h top side of the fuel tank, it is a grrn valve pushed into the tank, pull it out and replace.
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The engine is likely to stall when the filter gets plugged with dirt and dust as too much air is filtered which deprives the engine of adequate air which is necessary for combustion. The air filter on a chainsaw is located at the rear. Loosen the fasteners and remove the filter to inspect for any dirt.
The correct mixing ratio for your Husqvarna is detailed in the warranty handbook. As a general guide, a fuel / oil ratio of 50:1 is recommended in Husqvarna products up to and including 75cc. In certain heavy use applications, models above 75cc may be run on a mix of 33:1.
The most likely cause is a build-up of sawdust and chain oil on the cooling fins. Clean your saw after every use. It could also be an inadequate amount of oil in the gas oil mix, or too much alcohol in the gasoline washing oil off of internal parts. That would cause an increase in heat due to poor lubrication.
Covered or clogged exhaust port
This is mostly because fumes leaving the exhaust port are warm, and if they can`t leave the chainsaw properly a good part of the chainsaw`s ability to give off heat into the surrounding air will suffer, causing it to become more hot than it normally would be.
If your chainsaw does not start, the fuel may be too hot. To prevent this from happening, always use fresh fuel and reduce your operating time when the weather is warm. If your chainsaw will not start, place it in a cool area away from sunlight for at least 20 minutes.
A fuel / oil ratio of 50:1 is recommended for all Husqvarna 2-stroke products.
A 100ml bottle is suitable for mixing with 5 litres of fuel to achieve a 50:1 fuel-oil ratio.
If you take good care of your Husqvarna riding lawn mower and follow the standard maintenance procedures mentioned above, it should last for many years to come. With regular use and proper care, you can expect your mower to last around 600-800 hours or more.
Summer maintenance – get your lawn mower ready for summer. With the right maintenance, your mower can live well and strong for about 15 years. With the peak season of mowing approaching: here are Husqvarna`s best tips on how to care for your machine.
There could be various causes: incorrect fuel mixture, carburation not calibrated properly, or a wet spark plug. In spite of their power and robustness, chainsaws are actually rather delicate machines that require careful and precise maintenance at every stage of their life cycle.
Before you refuel your Petrol Chainsaw, allow the engine to cool for 5 minutes. Petrol vapour can easily be ignited by a spark or even a hot surface while refuelling your Chainsaw.
If your chainsaw still starts and then stops working, check the air filter. Clean or replace the air filter if it is dirty or damaged. Another reason that your chainsaw starts and then stops working could be that the spark arrestor is dirty or clogged. If this is the case, clean it with a wire brush.
If the filter becomes clogged, not enough fuel will reach the engine for it to run properly. Because your chainsaw will idle, but dies when it is revved up to full power, it means that the filter is only partially clogged; it will allow enough fuel to the engine to run on idle, but not enough to sustain full throttle.
The “Bog” simply means the engine is not receiving enough fuel when you go to wide open throttle. While there are other issues that may cause similar reactions within the carburetor, often the problem can be traced back to the accelerator pump system. Incorrect adjustment is the typical culprit.
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Have a craftsman 16″ chain saw 358.360260. Could not initially get it started after it had sat for a couple years with fuel stabilizer in it. When I went to use it the fuel had all evaporated and the fuel pick line was rotted. I replaced that with some difficulty but finally got it on. Saw still wouldn’t start. Replaced the fuel filter. Still wouldn’t start. Pulled the carb apart and cleaned and recleaned everything. Diaphragms were good and I didn’t adjust any of the mixture screws because as I said it ran fine before storage. Non of the carb passages were clogged. Fresh gas 40:1, good spark plug and good spark. Airfilter is good. Engine has maybe about 4 hours of total run time on it. It’s a ZAMA (?) carb. It will run for about 30 seconds when I manually prime it by pouring a small amount of fuel directly though the carb. When I was disassembling the carb the vent hose that goes back into the fuel tank seemed to have a small out of ?substance? in it which I cleaned out. It was right at the end the of the hose that goes back into the fuel tank and not up by the carb. It didn’t appear to be like your typical gummy deposits/varnish though. I hope it wasn?t some type of spongy check valve stuff that is supposed to be in there. That might explain some of my problems. Anyway, I also can not seem to get the primer bulb to fill. When I open the fuel tank, look in side and depress the primer bulb, air bubbles come out of the fuel filter. But when I let the bulb reexpand there’s no fuel that gets sucked up the hose. I can however seem to fill the primer bulb when the fuel tank is full and the chainsaw is laying on it?s pull cord side and the bulb is depressed a bunch of times. The saw will also start and run again for about 15 seconds then die. It’s definitely not getting/fuel and probably running out . Thanks.
ANSWER :
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I have a husqvarna 323L string trimmer. I stored it after running the tank & carb dry for about two years. I fueled it, then started it, & it ran for a minute then died like I turned the switch off. Since it would not restart, I found the fuel filter had broken off the hardened fuel line & it sucked gummy crap out of the tank & into the carb. Failing at cleaning the carb, I finally put a new carb on it & replaced the pump, hoses & filter. It has ran good till this year. I winterized it with stabilizer & left it with a full tank over the winter. The gas in the tank was gone when I got ready to use it this year. I filled the tank with premix, checked for leaks, then started it. It would run fine for about half a tank, start idling poorly (lean) then cutoff & refuse to restart till I refilled the tank. I finally found the tank had cracks & was letting pressure out of the tank & apparently this was causing the carb to lose it’s ability to siphon gas out of the tank. So I replaced the tank which came with new hoses & a filter, which I properly installed to the carb. It cranked right up, but when it runs a half tank, the carb quits sucking gas out of the tank. When I pump to prime the carb, it moves the fuel into the carb, but the pump never gets hard like it does when I prime the carb when the motor is cold. I have to keep refilling the tank, prime, & then it starts & runs until the tank gets about half empty. The new fuel filter is down in the gas tank properly, but It will not run after it shuts off until I refill the tank & prime. I’m baffled. New tank, new hoses, new filter, new carb, & I can find no leaks in the fuel system. It runs strong. The 323L is a two-stroke & it always cranks on the second pull from cold on a full tank. Any ideas?
ANSWER :
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I have a Craftsman Gold 6.0 mulching mower with a B&S engine on it that has been idle for about 10 years. It was only lightly used before that and I ran the gas tank dry before putting it away. Today I put gas in the tank pressed the primer bulb 3X and pulled the cord a few times without it starting. I noticed gas dribbling out of the little hole in the center of the primer bulb. It continuously drips and the gas is puddling on the top deck of the mower. Is this likely a problem with the primer bulb or something else? Thanks.
ANSWER : Sounds like the primer bulb dry rotted from sitting &/or the float is stuck in carb. If gas is indeed leaking from bulb. It will need to be replaced. While it is apart, clean carb inside & out with spray carb cleaner.
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Troybilt trimmer primer bulb collapses. it will start occasionally but will only run a few minutes.i have replaced the primer bulb and gas lines and still have the same problems.
ANSWER : It should have a small vent in the fule tank cap if its blocked the primer bulb will be sucked in as the fule pump can **** any fule from the tank
check the tank cap first,,,,,
check the tank cap first,,,,,
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I just put new fuel line on my trimmer now i cant start it not getting fuel the line never fills with fuel but i can **** fuel out so i know it not pinched it a weedeater brand ght-17
ANSWER : Make sure the little valve under the tank if you have one is fully turned clockwise. Make sure there is nothing clogging the tiny screen inside the fuel tank. Check or test your primer bulb it may be leaky. If carb or intake is leaking, you won’t get gas either. If you have a filter on this model, try changing it.
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Why won’t the Prime bulb fill on blower and how to fix?
ANSWER : YOU HAVE THE PRIMER BULB HOOK UP WRONG TRY CHANGING THE FUEL LINES
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Primer bulb will not take in the fuel in it seems block
ANSWER : A fuel system inspection is needed here. You need to check the intank fuel filter,(make sure its not clogged) the condition of the fuel lines,(soft, not brittle with no tears or cracks) ,the ventin the gas cap,(little rubber tube must allow air in). Foremost, check the condition of the bulb itself:sets in (primer base assembly) that has very small check valves inside it controlling the inflow and outflow of fuel. There cannot be any air leaks as the bulb on the carb and one mounted remotely from the carb depend on a vacuum effect to operate correctly. So some disassembly and acute inspection will be required.
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The primer bulb has quite an air bubble in it so I am wondering does this mean that it leaks?
ANSWER : No. If you pump it and it draws gas, you are fine
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