[KonaKid]

I posted this a few weeks ago, and none of the suggestions seem to be helping. So here is a video that I thought may explain what is happening better.

When I sqeeze the accelerator trigger, this knob clicks and flips to the far left (as it is supposed to) and then it slowly dies. It slowly started bogging down over about a 2 hour period until it is now doing this. But if I manually turn this knob (as shown in the video) it will rev up to what is almost full speed - but if I click to full choke it backs off. Tried to show this in the video.

It is a fairly new blower (I year old - light farm use - 2-3 times a month for an hour). I use only ethanol free gas, and put a new fuel and air filter in which didn't help. Also tried spraying in some carb cleaner.

Any advice would be appreciated.

Link to Video

 

[hal]

can't see video, set to private....

 

[Stihl4lyfe]

My best guess would you need to adjust the carb, possibly valves

 

[KonaKid]

Thanks - Sorry about that - should be viewable now.

 

[KonaKid]

My best guess would you need to adjust the carb, possibly valves

Requires a special tool that I don't have. And if I take into the repair shop, I'll be lucky to get it back within a month. I'm on a smaller island in Hawaii.

It seems to run fine when I manually turn that knob - so a doubt it is valves. I remember that the knob would move on it's own when I accelerated - but whatever caused it to move when I applied gas is apparently no longer working. I don't know if it is a linkage that does that or "suction/air flow" that causes it to move. Whatever causes it to move doesn't do it anymore - but if I manually turn it it revs up just fine.

I thought the video might show what I am trying to explain. And it looks like any linkage is "behind" the carb and I have to take everything apart to get to it. I have never taken that apart before, and have no gaskets, etc. And I normally get the wrong parts when ordering them on line. And local Stihl guy here doesn't carry stuff.

Just have to think it is something simple as it is used so little, always stored inside, and always with good gas - and with new filters. Was hoping anyways. Thanks for reading.

 

[hal]

The 'high' jet is not getting the fuel to the engine, clogged, semi clogged and needs to be cleaned out. Run a good bit of seafoam through it, pour it right in the tank of gas (with 2 cycle gas) and run the crap (literally) out of it......

 

[KonaKid]

The 'high' jet is not getting the fuel to the engine, clogged, semi clogged and needs to be cleaned out. Run a good bit of seafoam through it, pour it right in the tank of gas (with 2 cycle gas) and run the crap (literally) out of it......

Thanks - worth a try. Never used it. Could you be more specific. I can get spray can or pour can. How much to pour in tank of gas. I can get it to rev by manually turning that knob. So, do I pour into tank, start, and then turn that knob to get it up to high revs. That is the only way I can get it to rev.

Only question is - if it is the high jet why won't it idle when knob is all the way over to left. It will idle when in the start mode idle. But once I pull trigger and knob clicks over to "low" idle, it dies. Why would clogged high jet cause that to happen. And why would it rev high when knob turned manually - does that "'by-pass" the high jet?

Always like to know the why with these things. So, that every repair I learn something.

 

[hal]

Pour bottle about 1/2 a tank with 2 cycle gas, just run it, hard, if it doesn't clear it up you will have to get it serviced at dealer

 

[KonaKid]

Thanks Hal - but a 16 oz bottle into 1/2 tank of 2 cycle gas seems like it will have almost more Seafood than gas. Is that correct? Is Seafoam a gas?

 

[Carolina Cuttin' Company]

...light farm use...

...I'm on a smaller island in Hawaii...

Just curious. What do people farm in Hawaii?

 

[KonaKid]

Cut and potted flowers (Orchids, Anthuriums, other exotics), palms, and Houseplants. Plus most of the landscaping plants for homes and resorts.

 

[windflower]

Totally agree it is running lean which is why adding choke will let it run better. The seafoam should do the trick. If it doesn't you could remove the carb and soak it in a carb cleaning solution. Gunk makes one in a gallon can.

 

[Brucey]

Remove the spark arrestor from the exhaust. It's probably clogged. Ignore if you've already checked this.

 

[sidemouse.ii]

Requires a special tool that I don't have. And if I take into the repair shop, I'll be lucky to get it back within a month. I'm on a smaller island in Hawaii.

I'm the other person who gave you the same advice, adjust the H screw.
You can order the special tool online, have it delivered to you.
It's Stihl 5910 890 2307
You can use google / duckduckgo, find it on ebay or amazon, order it, have it shipped to you.

We can't help you beyond our suggestions, we can't do it for you.

This screw:

 

[KonaKid]

Totally agree it is running lean which is why adding choke will let it run better. The seafoam should do the trick. If it doesn't you could remove the carb and soak it in a carb cleaning solution. Gunk makes one in a gallon can.

Thanks - will give it a try. Just picked some up. I never messed with a carb on one of these things. I didn't think they could get messed up so easily and soon. Still unsure how much Seafoam to put in a tank. Is half Seafoam and half gas too much?

 

[KonaKid]

Remove the spark arrestor from the exhaust. It's probably clogged. Ignore if you've already checked this.

Thanks for suggestion. That is my number one thing to do with these small engines. Everything is so wet here all the time, we never really need them. So, out they come at first sign of trouble. The screen on this one was super clean. So, I didn't think the carb could be messing up.

 

[KonaKid]

I'm the other person who gave you the same advice, adjust the H screw.
You can order the special tool online, have it delivered to you.
It's Stihl 5910 890 2307
You can use google / duckduckgo, find it on ebay or amazon, order it, have it shipped to you.

We can't help you beyond our suggestions, we can't do it for you.

This screw:
View attachment 528396

My dealer tried to steer me away from messing with those settings. Instead suggesting spark arrestor, fuel filter as most often the culprit. Convinced me that messing with those settings in a machine so new, and running great until it went downhill in an hour, would just get me in a deeper hole.

Really appreciate the feedback.

 

[sidemouse.ii]

My dealer tried to steer me away from messing with those settings. Instead suggesting spark arrestor, fuel filter as most often the culprit. Convinced me that messing with those settings in a machine so new, and running great until it went downhill in an hour, would just get me in a deeper hole.

Really appreciate the feedback.

Your dealer may not be entirely wrong, especially if you have no experience adjusting those.
However, your dealer should also be able to make those adjustments for a small fee.

 

[walkinonwater27]

I would go with carb needs to be broken down, one of your golden “needles” has some dirt on it. Doesn’t take much. Easy job imo just record taking it apart or get it done the same day so you don’t forget the steps.

 

[hal]

Thanks - will give it a try. Just picked some up. I never messed with a carb on one of these things. I didn't think they could get messed up so easily and soon. Still unsure how much Seafoam to put in a tank. Is half Seafoam and half gas too much?

Yes its fine, just make sure it has 2 cycle oil/gas mixed with it, just run it........