2-Cycle Tiller
How to Identify and Fix Common Gardening Problems ?
We provide a variety of viewpoints on how to identify and fix common gardening problems. Our sources include academic articles, blog posts, and personal essays from experienced gardeners :
Fuel Vein Blockage
Eventually the blockage can cause a complete stoppage of fuel going into the engine, therefore causing it bog down and stop. If you suspect you have a blockage, the best cause of action is to strip down the carburettor and blow down the fuel veins with an air line or air blower.
Poor Gas Quality
The fuel used for your outboard motor can be one of the primary reasons why your outboard motor is bogging down. And this is most likely caused by the ethanol content of the gas.
2 stroke bogging before powerband
If the engine is bogging before it gets to the powerband, then the air-fuel mixture is most likely off. When the engine isn`t burning the proper amount of fuel and air, it won`t produce power and accelerate, giving you the annoying and dangerous “bog”.
Once you are done cleaning your boat carburetor, you need to check your float level. The float level determines the amount of fuel in the carburetor bowl. If the float level is too low, it means that not enough fuel will be flowing through your carburetor, causing a bog.
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.
Often a faulty CDI unit will see intermittent or no spark on cylinders and may only breakdown when your engine warms up. Receiving voltage from the CDI unit the coil will amplify voltage and shoot it through to the spark plug. Faulty or damaged coils will have weak or no output.
This can happen when the pump itself is not working properly or when the fuel pressure regulator is not maintaining the proper fuel pressure in the fuel system causing the engine to starve for fuel.
Loose fuel line connections, pinched or blocked fuel lines. It would be best to inspect all fuel lines for any bad connections, damage to the line, and leakage issues. Replacing a damaged fuel line is typically the best course, as repairing a damaged line naturally leads to further problems within a short period.
What happens if the mixing ratios in a 2 stroke engine are incorrect? If you put too much oil, it can generate additional carbon build-up, making it difficult to start the engine, blow excessive smoke which is particularly bad for the environment and may (with time) cause the engine to stop operating correctly.
It`s important to get your fuel-to-oil ratios right when mixing two-stroke fuel. Too much oil, and your engine may struggle to start or run, generate carbon buildup on engine internals, blow clouds of smoke and perform poorly in general.
Engine RPM bog down occurs as the engine is loaded beyond its torque-producing capabilities. This occurs when engine RPMs are allowed to decay below the design specification. Bog down can occur during ground start, taxi, and the landing roll.
You most likely have a filter problem or fouled plugs. That could be why your boat motor is losing power. Solution: Replace the in-line fuel filter.
If the engine is low on power, it will bog down when you try to accelerate. This could be caused by a number of different issues, including low compression, a bad timing belt, sucking too much air, or even a head gasket leak.
One of the more common questions we get concerns either the overwhelming smell of gas coming from the carburetor or fuel leaking out of the bowl or overflow. Both conditions are typically caused by a stuck or worn float needle valve.
If the engine is low on power, it will bog down when you try to accelerate. This could be caused by a number of different issues, including low compression, a bad timing belt, sucking too much air, or even a head gasket leak.
Worn piston rings can cause incomplete sealing, resulting in lower compression and more difficulty in starting. Worn piston rings or reed valves that are no longer sealing properly may be the cause of the poor startability characteristic.
An engine bogs down in low end rpms if the valve overlap is too much, if it can`t build up compression, if the mixture is too weak, if the fuel isn`t atomised well, if the spark isn`t timed correctly, or if the spark is too weak. These are in general the only reasons an engine could bog down, at low rpms.
Discover Relevant Questions and Answers for Your Specific Issue
the most relevant questions and answers related to your specific issue
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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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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Why will My weed eater only run with the choke fully on and cant give throttle?
ANSWER : It sounds like the carb needs adjusted. Things can even happen to new weed eaters.
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Wont run, not getting fuel. disconnected fuel filter, still nothing. Can spray a shot of carb cleaner directly into carb, and will run until it burns the fuel then dies. Check and getting good spark.
ANSWER : You say it’s not getting fuel? when you bypassed the filter was gas coming out of the fuel line right where it connects to the carb? If it runs on ether, carb cleaner or pouring fuel in the carb then your problem wont be the the carb or motor it will be something like a cracked, dryrotted or pinhole in the fuel line. Or something restricting the flow from the tank to the carb.
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TORO 6.5 RUNS FOR 4 SECONDS AFTER PRIMING THEN DIES.pUT IN NEW SPARK PLUG,new gas,but after priming run for several seconds.. it dies again….can you help…sounds like dirt in carb??/ It had run perfectly for past 3 weeks,but problems now..
ANSWER : Did you check the filter? If the engine doesn’t get air they it could cause it to die out like that. Also make sure that there isn’t anything in the air line to the carb. Did you check the gas line and make sure that you are getting enough fuel?
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I have a 266 se husky saw and I can not get it to start, there is spark and fresh fuel in the saw, I have put a kit in the carb and the saw will fire but stop, it appears to flood with fuel after a short period of time while attempting to start it.The saw was running fine until the carb came loose on the barrel but I have been unsucessful at getting it to run since I have replaced the gasket between the carb and cylinder.
ANSWER : It probably damaged the diaphram when the carb came loose. you could try adjusting the carb. that will solve it every once in a while.
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Can get it to start, but runs about three seconds and stops. the choke is pushed in. But seems to want to run longer with the choke out. 4 seconds…
ANSWER : Its the old problem,,,,,,,short of fule, or no fule getting to the carb,,,,, clean out the tank filters and then clean out the carb and all the jets in it as well put in fresh fule and then it will run all day and with out the choke being on,,, thats a lot longer than 4 seconds!
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My 26bv blower vac starts and runs fine but shuts off after between 1 and 3 minutes. It will usually start again immediatly but then shuts off again. Any idead what the problem is?
I have adjusted the carburetor because previously it would only run on half choke. Now it runs fine but won’t stay running as described above. What are the factory settings for the carb?
ANSWER : I have exactly the same problem. Has anyone an answer as to how to fix the problem? I can keep turning the knob from choke to medium choke to keep engine from stalling but it is a constant battle to keep engine going.
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