ChatterBank2 mins ago
Flymo (petrol) advice needed.
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Hello, I've got a Flymo L470 2-stroke hover mower. Used to work fine but now will only start with full choke on but dies as I ease the choke off. Any thoughts, anybody? Cheers, Andy
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While not familiar with the brand of equipment you're describing (I live in the U.S.) any two stroke engine I've worked on are the same in most respects.
If you gain acess to the carburetor (it's not actually a carburetor in the true sense of the word), especiall ehre you would apply choke to start the engine, you should notice three fairly small screws. One is the idle adjustment and it's noticeably seperated from the other two. We'll talk about that in a moment.
The other two are the low speed adjustment and the other the high speed adjustment. If youre engine is standard the low speed screw will be closest to the cylinder.
Start by screwing both screws in to their fullest... snug but not overly tight. Then, back off both about a turn and a half.
Start the engine and attempt to rev it to the fullest with the accelerator handle... while revving it turn the screw further in (it whouldn't take too much) until you achieve a slight drop off in revs, turn it ever-so slightly back out.... now, let's set the idle mixture. You may have to set the idle setting the seperate screw I mentioned to get it to idle. Then, rev the engine and let off the accelerator rapidly. Turn the low speed mixture screw in only slightly... maybe a quarter turn. Again, accelerate the engine and let off the throttle quickly... if it doesn't falter, turn the low speed idle setting in another quarter turn... repeat this process until the enigne does falter at idle the turn it back out even more slightly... say one eighth of a turn... Lastly, adjust the idle screw to your liking. Should be good to go unless the ports are dirty or corroded, in which case I'd say take it to a shop, although you can clean them yourself but you should have a manual to assist you.
Best of luck!
If you gain acess to the carburetor (it's not actually a carburetor in the true sense of the word), especiall ehre you would apply choke to start the engine, you should notice three fairly small screws. One is the idle adjustment and it's noticeably seperated from the other two. We'll talk about that in a moment.
The other two are the low speed adjustment and the other the high speed adjustment. If youre engine is standard the low speed screw will be closest to the cylinder.
Start by screwing both screws in to their fullest... snug but not overly tight. Then, back off both about a turn and a half.
Start the engine and attempt to rev it to the fullest with the accelerator handle... while revving it turn the screw further in (it whouldn't take too much) until you achieve a slight drop off in revs, turn it ever-so slightly back out.... now, let's set the idle mixture. You may have to set the idle setting the seperate screw I mentioned to get it to idle. Then, rev the engine and let off the accelerator rapidly. Turn the low speed mixture screw in only slightly... maybe a quarter turn. Again, accelerate the engine and let off the throttle quickly... if it doesn't falter, turn the low speed idle setting in another quarter turn... repeat this process until the enigne does falter at idle the turn it back out even more slightly... say one eighth of a turn... Lastly, adjust the idle screw to your liking. Should be good to go unless the ports are dirty or corroded, in which case I'd say take it to a shop, although you can clean them yourself but you should have a manual to assist you.
Best of luck!
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