my FS55 trimmer wont run off idle unless the choke is on and then it dies. I put a carb kit in it but still won't. any suggestions?
already told you
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The first thing you should check is your exhaust screen. The outlet of your muffler will have a 5/16 inch nut, remove this and there is a cone shaped screen inside the muffler that acts like as a spark arrestor, if it is plugged up with carbon your engine will not run past an idle. If it is clear then it may be in your carburetor. Even though you have rebuilt it there could be a blockage or a welch plug that is leaking. If your unit is less then 2 years old then you can bring it into your dealer and ask that they warranty the carb. They should without an issue, If not or if your machine is out of warranty then you can replace the entire carburetor. The new part number with upgraded sealant resistant to ethanol is 4140(NNN) NNN-NNNNand will only run you $29.90
never thought of the exhaust and i will check it but it sends out lots of smoke when it runs. where can I get and exploded diagram of the carb in case I didn't put it back together properly? also there are 2 little cover things I didn't change because they look like they are oressed in. also i should tell you it is not my unit. The local stihl dealer Watts small engine is 3 weeks behind even looking at stuff so I am trying to help a friend. the new carb sounds good and I should be able to get that from the dealer correct?
The dealer should be able to get you the carb without a problem. The 2 cover things are the jets, these should not have to be touched that is why they are capped. Which carb do you have and I will get you a breakdown
I went out to the shop and removed the arrestor thing and it looks plugged. does it have to be in there for the motor to run as it still just runs on idle and as soon as I touch the throttle it quits. so annoying. the kit says RB 89 rebuild kit. that is the only number i have. You have been very helpful. I ask a lot of questions.
No it does not need to be in there to run, if you are still having issues remove the muffler itself and check the exhaust outlet and the inlet to the muffler
Found your muffler, here is a breakdown;
Gold certified Stihl tech, Service Manager for a rental/repair shop.Certified in most small engines
Ok, I will try that. hope screw #21 doesn't have to be set too critical. I have it at 2 1/4 turns from the seat.
Screw #21 does not effect the operation of the engine or mix air and fuel. It simply sets the low speed of the engine by contacting the arm that moves the throttle plate inside the carb. If your idle is too low turn it up, too high just back it off a little until the head does not spin
I finally got it working like a charm. I think the exhaust thing was most of the problem.
must remember that the exhaust has to get out freely as well as the fuel needs to get in. hope I get you again the next time I have a problem and I have lots :o)
I see that a lot on the exhausts. The number one reason for that is running your engine at less then full throttle. 2 cycle engines Also you can always ask for me by name if you need help with another project
want to ask you another question but how do I get you?
I believe you can ask for certain experts, or you can just address the question to me. Add my name into the title and I will get right on it