Gardenline CS3800 chainsaw won't start

asgaard

Dear Boardies,


I bought second hand chainsaw and it seemed to works fine, but I was informed there is no oil in it, so without looking for specific chainsaw oil I filled it with Autogear Power SYN 75W-90 and I think I did even worse as it's stopped working, so I replaced this one and filled with SL 15W-40, but still no joy. I took off the spark plug and it seems to be dry. Do I have to mix petrol with oil before I gonna fill it ? What should I do now? Do I have to spill out 15W-40 and fill it with petrol to clean oil tank? Chainsaw comes with two tanks.




https://www.imageupload.net/image/Dht3B
https://www.imageupload.net/image/Dhswp
https://www.imageupload.net/image/Dh4sO
https://www.imageupload.net/image/DhP8k


Thanks

archer22

There are two separate oils that go in a chainsaw.
One tank takes oil for the chain, the other takes a premixed petrol and two stroke oil combination.Depending on saw make the petrol/2 stroke mix is usually between 25/1 to 50/1.
The chain oil even if you used the wrong type should not affect the starting of the engine.
So the issue is what did you put into the fuel (petrol) tank?.

Doctors room ghost

Put chain oil in the chain oil reservoir and mix petrol and 2 stroke oil for the fuel tank.
Where did you put them oils you used

asgaard

https://www.youtube.com/watch?v=6hFKfT81yQA

I think I know where the problem is, instead of getting 2 stroke oil and mix it with petrol, I filled it with clean petrol. Question is: If I gonna spill petrol from the tank and if I fill it with mix (petrol with 2stroke oil) will it work?

listermint

For me based on what I'm reading so far.

Give the saw away.

archer22

asgaard wrote: »

https://www.youtube.com/watch?v=6hFKfT81yQA

I think I know where the problem is, instead of getting 2 stroke oil and mix it with petrol, I filled it with clean petrol. Question is: If I gonna spill petrol from the tank and if I fill it with mix (petrol with 2stroke oil) will it work?

It might work if the engine hasn't seized which is usual end result of using petrol without oil in them

asgaard

archer22 wrote: »

It might work if the engine hasn't seized which is usual end result of using petrol without oil in them

I will give it go and will keep u inform.


Thanks

Doctors room ghost

There’s a good chance that engine is damaged beyond repair if you ran it on straight petrol.
It’s a 2 stroke engine that you basically ran as a 4 stroke.
If it’s turning over on the pull you might get it going again but it’s most likely heat damaged internally.
Empty all the petrol out of it and put a strong mix of 2 stroke in it clean the plug and see will it fire.
Check the brake is on it aswell as the choke and obviously the stopper switch is turned to on.
The piston is surely scored on it though.

asgaard

It doesn't start, but i took of the spark plug and it doesn't give any sparks? Would it be possible that spark plug was working yesterday and now it won't. I cleaned it as well with metal brush, but no joy.

Thanks

archer22

asgaard wrote: »

It doesn't start, but i took of the spark plug and it doesn't give any sparks? Would it be possible that spark plug was working yesterday and now it won't. I cleaned it as well with metal brush, but no joy.

Thanks

You need a fairly dark place to check a chainsaw spark plug..often times they are sparking fine but you cannot see it if you are in brightness.
And you also should earth it to metal part of saw.

I take it you can still pull the starter cord ok on the Chainsaw then?

CJhaughey

Remove the spark plug and then put it back into the cap then touch the metal part of the sparkplug against the cylinder,then pull the starter.
The metal part of the plug has to earth against the chainsaw or it will not make any spark.
How long did the saw run with no oil in the petrol?

asgaard

CJhaughey wrote: »

Remove the spark plug and then put it back into the cap then touch the metal part of the sparkplug against the cylinder,then pull the starter.
The metal part of the plug has to earth against the chainsaw or it will not make any spark.
How long did the saw run with no oil in the petrol?

For about 5 minutes

asgaard

archer22 wrote: »

I take it you can still pull the starter cord ok on the Chainsaw then?

Yes

CJhaughey

asgaard wrote: »

For about 5 minutes

I would bet the exhaust side of the piston is badly scored and smeared.
That part gets hottest the fastest and will probably have smeared the piston over the rings which will reduce the compression and prevent starting.
To check compression fit the sparkplug and hold the saw by the starter handle, if the compression is good it will fall very slowly, If the compression is bad it will fall a lot faster within a few seconds.
You may be able to buy a new piston and cylinder but it won't be that cheap.
Basically unless you have a cheap P+C the saw is scrap.

archer22

asgaard wrote: »

Yes

If you can pull the starter cord then the engine isn't seized.
It may however have some damage.

Sometimes after straight gassing you can get only light seizing,if you are lucky, meaning you can still pull the starter cord but its a slow hard pull that won't start the saw.

This can often be cured, first step is to remove plug and pour a teaspoon of 2 stroke oil into the chamber...work the starter cord a few times to distribute the oil then leave for a few hours.
When you get back to it work the starter pull 40 or 50 times (without plug) then replace plug and try to start in normal fashion.
If it does start, let it idle for about ten minutes then rev it a bit then cut with it.
For first start use a strong fuel mix...at least 25/1 (thats probably what it takes anyhow).

asgaard

archer22 wrote: »

If you can pull the starter cord then the engine isn't seized.
It may however have some damage.

Sometimes after straight gassing you can get only light seizing,if you are lucky, meaning you can still pull the starter cord but its a slow hard pull that won't start the saw.

This can often be cured, first step is to remove plug and pour a teaspoon of 2 stroke oil into the chamber...work the starter cord a few times to distribute the oil then leave for a few hours.
When you get back to it work the starter pull 40 or 50 times (without plug) then replace plug and try to start in normal fashion.
If it does start, let it idle for about ten minutes then rev it a bit then cut with it.
For first start use a strong fuel mix...at least 25/1 (thats probably what it takes anyhow).

Instead of pulling the cord every second I did same thing as the guy https://www.youtube.com/watch?v=oRMwtZVFBbc forward to 5:11 minutes, I will try your ideas tomorrow.


Thanks a lot

archer22

asgaard wrote: »

Instead of pulling the cord every second I did same thing as the guy https://www.youtube.com/watch?v=oRMwtZVFBbc forward to 5:11 minutes, I will try your ideas tomorrow.


Thanks a lot

I think I would ignore what the guy in that video was doing, not quite sure that he knew exactly what he was trying to do...the people who commented underneath didn't seem to be impressed either.
The only thing that seemed to match in his video was the slow hard pull on the starter cord at the beginning..is that in yours now?

Regarding your spark plug...did you ever get to see a spark from it?
If not then it might just be possible that the friction heat from the straight gassing killed it (although I never seen that before, I wouldn't rule it out though). Anyhow plugs are cheap and so it would also be worth trying a new one, just to eliminate it as a possible factor if nothing else.

asgaard

So I bought new spark plug and it gives good spark as I've checked it, but obviously when I removed the spark plug it looks like it spills out the petrol, so I cleaned/dry the spark plug but still can't start it. It's still has good compression, cuz I checked it as well. Any ideas lads what else I can try?

Btw.

I can pull the starter cord without any issues.

longgonesilver

List out your whole start-up sequence.

asgaard

longgonesilver wrote: »

List out your whole start-up sequence.

I emptied the tank in the chainsaw and took of spark plug, there is still some petrol left, I pulled the cord couple of times already.

Btw. It's a gardencare instead of gardenline chainsaw

asgaard

Update: I checked the spark plug abd it looks like it doesn't get any fuel as it's still dry

Purgative

This guy knows his stuff:

archer22

asgaard wrote: »

So I bought new spark plug and it gives good spark as I've checked it, but obviously when I removed the spark plug it looks like it spills out the petrol, so I cleaned/dry the spark plug but still can't start it. It's still has good compression, cuz I checked it as well. Any ideas lads what else I can try?

Btw.

I can pull the starter cord without any issues.

I guess the next thing you need to do is take off the muffler and have a look at the piston as explained in the third video put up by Purgative...if its in something like that condition then there is no point proceeding further.

You said though it still had "good compression" how did you measure that?
When you pull the starter cord is it a soft straight pull like in the video or is it a stiff bumpy pull as it goes through compression strokes?

asgaard

I upload some photos of further investigations


https://www.imageupload.net/image/Dy5Q2
https://www.imageupload.net/image/Dymqq
https://www.imageupload.net/image/DyDGB
https://www.imageupload.net/image/Dyw6a
https://www.imageupload.net/image/DydBv
https://www.imageupload.net/image/DycXZ
https://www.imageupload.net/image/DyrCb
https://www.imageupload.net/image/Dy95r
https://www.imageupload.net/image/DyYz1
https://www.imageupload.net/image/Dyz4J

asgaard

I had a look once again at the third video, seems like I'm in need of another chainsaw as the current one strictly for parts or will be going into bin.

Thanks for your help

Btw. as it's stated in the third video piston is completely damaged and don't think it can be replaced.