2 Cycle Trimmer Only Runs on Choke | Won't start - How to Diagnose & Fix

i got this echo trimmer it's a hedge trimmer but this is going to apply to hedge trimmers weed eaters whatever two cycle engines you have and this came from a large landscaping company and there's a story behind it one of the employees used this and was in a rush and put regular gas in here so he burned up the piston burned up the cylinder wall and had to do something about that so they went ahead and instead of just ordering the cylinder wall and the piston they got the whole engine because it was just a little bit more so they put the engine on there put it all back together and this thing is basically brand new they just got it paid 460 bucks for it the engine cost them 129 and they thought they just put that on and off they'd go well they put that on and it'll only run on choke now they said so i got it and i'm gonna walk you through with me to try to figure out what's wrong with this they couldn't figure it out they worked on it worked on it and finally gave up and said can you look at it and see if you can come up with something so let's do it well first let's go ahead and see if we can get it started primer bulb is full pushing fluid switch it on that's not very encouraging yeah move the choke lever and it won't run they actually told me they did a hedge trimming job running it on choke so and i don't know how they did that but i'm not getting anything out of this i got the choke off now they also said that they took the carburetor off took it all apart made sure everything was clean the screen was clean nothing no blockage and like i said this thing's new so and obviously we've got fire so i'm gonna walk through the simplest steps first and see if we can figure out what's wrong and hopefully it'll get this going and help you first thing i like to do is check the fuel look in the tank make sure there's no water in the fuel put a little bit in the glass jar and if there's water in there this will be separated and i don't see any separation at all so that looks okay just to show you what it looks like if you do have water in your fuel you probably see the line there the fuels on top the water's on the bottom and you don't need to take this much out but if you just put a little bit in a glass jar if you got water your machine's not going to run and you want to change that out you want to get fresh fuel in your tank next thing i'm going to do is check the fuel filter my handy hemostat grab the fuel line pull it out and they did say that they cleaned the filter and there it is looks like the ends off it but the screen's still on there just to make sure that that's open i'm going to pull the line off at the carburetor and blow on it make sure that's not clogged and now that i've blown that through i'm going to suck on it i'm not recommending you do this it's just what i do i just want to make sure this is open and not cloud so that's not our problem even though that's not right we'll hook that back up put that back down at the bottom of the tank and another thing that can create problems is this vent line you want to make sure your vents not clogged so i'm going to pull this off and actually i'm going to try to start it without this on and i want to make sure this line's not clogged i'm just blowing in it you have to pull the cap off otherwise you'll create pressure in there so the line's not clogged let's go ahead and try to start it and see if that'll fix this switch on prime it choke on choke [Music] halfway just doesn't seem like it's pulling fuel now one thing that seems a little odd to me on this is this uh purge or primer bulb it just seems like it's pulling gas but it's also pushing air so i'm gonna make sure they hook this up right we know the black line is the fuel supply line because we pulled the filter out and that was on the black line so it should be pulling fuel through this black line and then out and back into the tank so i'll go ahead and try it without this on and just make sure that they hook these lines up right we got nothing [Music] oh [Music] and because of that i'm going to switch this over aha look at that they had those lines uh backwards which would explain i could get a little fuel in the carburetor probably pulling through this purge line the return line and it burned off from the carburetor and then it wasn't pulling anymore through the filter let's see if that fixes our problem choke on that's a nice firm bulb now too look at that beautiful switch on now we got it idling but it won't throttle up there's two adjustment screws the high side that little brass hole right in there i don't know if you can see that and the long sides they seem okay on the low side but that adjustment's right there there's limiter caps on those and i'll show you how to get those off so we can adjust this carburetor now they just asked me to see if i could find out what's wrong because they know how to work on this equipment somewhat and obviously just had a an oversight there but i'm going to go ahead and remove those limiter caps and just try to fine tune it a little bit and let them take care of the rest but what i do i don't have the tool there's an extraction tool that you can get to take those plastic caps off but i just take heat from my little propane tank light that up and heat up this a little glasses screwdriver very very handy and it fits right in the hole so i heat the tip of that up just takes a 10 seconds get it glowing red probably can't see it in the day there you go see that and then you just stick it in the hole and i hold it there for about 30 seconds you can feel it sink in there's a plastic cap in there and after 30 seconds i just turn it and pull and there you go that cap pops right out we'll do the same thing with the top the low side it's right in this a barrel type carburetor it's right in the middle some people say these are hidden and they kind are but i'll do the same thing heat that up i hold it right in the center after it melts in just turn it i turn it counterclockwise or sometimes both ways and then slowly pull it out and now i can get at the adjustment screws i haven't done this one yet but this is a flat head screwdriver and this is locked in now i can adjust that so i'm having a hard time throttling up i'm going to go ahead and start it up and adjust that and see if we can get it to throttle up little bonus tip for you [Music] so ah [Applause] well i couldn't get that adjusted right as you could hear and so i'm going to go ahead and pull this off and even though i can pull air through it i do see some dirt in there and maybe that's restricting it a little bit so let's try that without that and see if that allows us to get it running nice oh yeah now watch i'll put this back on and it won't want to throttle up you have to wait for the tank to get lose all the air and it'll pop up that pulls air into the tank so that the tank the gas in the tank can pull into the carburetor if you block this off then there's no air to pull to pull the fuel into the carburetor so while this is running it's not getting enough air and over time it'll choke it [Music] i'll pull this off pulling there how about that they actually have two problems if this video was to help you give it a thumbs up if you haven't already please consider subscribing i look forward to helping you with other projects online

Channel: Helping U online

Views: 811,966

Keywords: 2 cycle engine only runs on choke, 2 cycle engine won't start, 2 stroke engine only runs on choke, 2 stroke won't start, trimmer only runs on choke, weed trimmer only runs on choke, blower only runs on choke, weed eater only runs on choke, string trimmer won't start, string trimmer only runs on choke, 2 Cycle Trimmer Only Runs on Choke

Id: dyXTq7eKgUc

Length: 14min 4sec (844 seconds)

Published: Tue Sep 06 2022