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2024/05/29 19:29:39

Bilito

I think I screwed up my Stihl tools

Hi new guy here with a prøblem.
I recently bought a 4 pak of stihl 2 stroke oil in the little oraange 1 0z bottles from ace hardware
I mixed what I thought was 1 oz of stihl oil in a fresh gal of gas
I filled the tanks of my 3 tools KM55RC KM55R & BG56 and my wife and I started to work with them, after about 20-30 min one after the other stopped working.
I tried and tried to start them back up and all I got was a snap or a cough and that was that
That is when I discovered that those little bottles of stihl oil were not 1 oz as I though, but 2oz. The bottle are the same size at first glance but then I found they are a little fatter, very deceptive
What damage have I done to my tools and how can I fix it?????

22 comments Leave a comment

Mikel1

Check spark arrestor in exhaust. I used a higher oil mix once on km55 and it clogged spark arrestor, cleaned it and still runs.

2024/05/29 20:02:06

SRTsFZ6

Ok, the label shows one container to one gallon of fuel.

How much oil did you mix with one gallon of fuel?

.

2024/05/30 08:30:44

Bilito

I checked the spark arresters, most were OK, but I cleaned them all anyway, no help at all
I did not read the label because the jar looked just like the original jars I have been using for many years. Just poured it all in to a 1 gal fuel container, but the label does read, "Makes Two Gallons"
Someone on another site suggested boiling the carb for 5 to 10 minutes. He gave no other info, such as, how to, in what, etc. I wrote back w/questions, no answer....yet

2024/05/30 10:14:46

Mikel1

Could be fuel filter or the small screen in the carb. Edited because I misread og post. Don’t boil these carbs, just no. Not a bad idea to clean spark plug also.

2024/05/30 11:06:23

Bilito

All my problems started shortly after we added fuel with accidentally double the oil amount to gas. Something must have clogged up somewhere on all 3 motors within 20-30 minutes after we started using them. IT was very strange.
Looking up Carb rebuild kits the only one specific to my machine BG56 I have in my cart to order from Hippa
but I cannot find any kit that is specific to KM55 or KM55R or KM55RC, I suspect they all have the same carb. Can any one help me there?

2024/05/30 11:43:37

Mikel1

Should have numbers on carb to get right rebuild kit. I think km55r has the C1q Zama but I think they were a few different models for it though. I’m at work so can’t look right now

2024/05/30 12:06:31

SRTsFZ6

You don't need to rebuild the carbs, period..

Obviously, dump all the fuel, put in the correct mix.
If the machine has a primer bulb, prime it a bunch to flush it.

Pull the spark plug and spin the engine over a couple (to clear it out).
The old spark plug is possibly fouled so install a new one, .020"..

If the machine does not start normally, hold the throttle WIDE OPEN, choke open.
It should now kick and likely smoke a bit for awhile.

.

2024/05/30 16:43:26

Bilito

I took the carb apart, there was some crud in the pump side but looking at the little screen I saw nothing on it.

I just put the parts in my ultrasonic cleaner along with a carb cleaner solution

Is there a schematic avail of these little carbs to show how the fuel flows etc?

Correct me if I am wrong but the primer bulb has a double function, press down and it push's fuel, primes, but when you let it up a suction forms to suck fuel up into the carb pump section.

2024/05/31 09:51:13

Mikel1

https://zamacorp.com/carburetorsystem-as249.html

2024/05/31 11:50:07

Bilito

I went to that HTML and got this message

page error try again later

2024/05/31 17:11:27

Mikel1

Interesting, works fine for me. Opened on my iphone and my laptop. Can you open zamacorp.com website?

2024/05/31 17:51:16

SRTsFZ6

Worked for me as well, on a lap top..

2024/05/31 18:22:28

Bilito

The site finally worked for me too.

It have it running now, it idles fairly well but it will not rev up, it starts to rev up but then it dies down.
Turns out I have two carbs for this kombi unit, one is the original Zama, the other is a cheapy. It will run with the original but will not even Fart with the cheapie unit
It seems as if it is not getting enough fuel as it starts to rev up, I can swap out parts between the two carbs. what should I do??
My wife is pushing me to buy a battery Kombi unit but the 350.00 price tag is money I don't want to spend.

Something is still blocked from my mistake with the fuel oil mix

2024/06/01 10:21:30

Mikel1

Did you try replacing fuel filter?

2024/06/01 12:13:22

Bilito

NO I did not, it looks clean and I suspect it is a bear to change

2024/06/01 12:22:02

Mikel1

Replacing Stihl fuel lines and fuel filter is easy. Just pop green cap out from tank

2024/06/01 12:43:30

Bilito

I wrote a nice answer to the fuel filter question, and pushed the "submit post" button, nothing happened, so I went to the very top and hit the "reply to post" button and my message just vanished. What happened?? where did it go??

2024/06/01 16:51:39

Mikel1

Lost to the matrix, 😂. No idea

2024/06/01 20:15:36

SRTsFZ6

Yep, sounds like it's not getting enough fuel.

You already cleaned the carb filter (I believe), Flush out
the in tank filter. You can pull the filter out the tank W/O draining..

Also, does the carb(s) have mixture screws on the side of it?
If so, there's often limiter screws there but you can adjust a little.
To richen the mix, turn the screws CC to richen the mix.

The screw closest to the air filter is the High speed adjuster, which should help

.

2024/06/02 07:28:24

Bilito

Back to the fuel filters. As was suggested I got the filter out of the tank of one of my motors, I did the old suck and blow test and it seemed OK, then when I did the same with one of the brand new filters, WOW what a difference. I guess when the oil heavy fuel mix got in there and it clogged up the filters just enough to be noticeable with the very light suction of the tiny carbs but just enough to starve the motors of fuel at normal operating speeds.
The basics are correct, clean or replace the spark plug, replace the fuel filter with a new one, alway use fresh fuel with the correct oil/fuel mix

2024/06/03 15:51:24

SRTsFZ6

So all machines are back up and running normally?

.

2024/06/03 16:32:46

Bilito

2 out of three, I only had two new filters,
it was mostly because of the help and suggestions that I received here.

2024/06/03 17:06:33

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I think I screwed up my Stihl tools

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