Help Jonsered 2150 Not Starting

[charliek1204]

I have a Jonsered 2150 that just stopped working midway thru a cut. Looks like it has spark (new plug) and gas. I did the basic tests from the service manual. I have an automotive compression tester is there a way to test the compression? Any other ideas or tests? We are working on my sons BSA eagle project so any help would be apperciated.....

 

[DG2244]

Check the basics first, fuel filter and air filter. You can check the compression easily by screwing the tester hose into the spark plug hole and pulling the recoil started a half dozen times or so. Should be at least 150psi to run right. Sometimes a vent problem with the tank will give you that symptom. If you open the fuel cap and hear a sucking sound that's a vacuum problem.

 

[charliek1204]

Thanks. Did the compression test. Only 60 psi. Going to check the condition of piston/ring via the exhaust to see if it is scored. Or do i need need to really pull the cylinder to check it? Saw is about 10 years old is it worth it to fix it ? If so is there a kit? Thanks again

 

[ronT2]

Just pull the muffler and check for scoring. There are kits but I'd find out why it's scored, if it is?

 

[charliek1204]

Well from the exhaust i can see piston has scored. any suggestions would be appreciated.. if it is worth it can i get a rebuild kit someplace ? thx again

 

[Great Smokies]

What he said^^^

If you know the fuel /oil was right, then you must have an air leak somewhere. Was the saw running high rpms before it died? As for rebuild value- a new equivalent saw is in the $400 range, if you can do the rebuild at parts cost, and the saw is otherwise good, I'd do it.

 

[charliek1204]

thanks. fuel/oil mix was good. Yes the saw was running high rpms. Is it still possible to check for an air leak ?

 

[ronT2]

thanks. fuel/oil mix was good. Yes the saw was running high rpms. Is it still possible to check for an air leak ?

Yes…but you’ll still have to get the muffler off to do it. Check out this thread for more info.

http://www.arboristsite.com/chainsaw/42768.htm