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What kind of fuel should I use in my Jonsered 621? i just got it today and can't find much about it

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Mix fuel 100:1 if your not sure or 50:1

Posted on Mar 02, 2009

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How do I change the sprocket on my Jonsered 621 chainsaw?


the sprocket is part of the centrifugal clutch assembly
go google and type in ---workshop manual for jonsered chain saws and there are pages of manuals
I opened one page named jonsered 2036 workshop manual --pdf download and it shows how to work on the chainsaw and includes other models in the procedures
that site is www.manualslib.com>brands>jonsered manuals> chainsaws>2036

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Have a jonsered 2240 chainsaw engine will start and idle on choke but cuts out when throttle is opened up it revs up then dies


Sounds like it might be fuel starvation. How long since you cleaned the fuel filter?

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I have a 1983 jonsered 520 sp and don't know the fuel ratio for this saw


You should run it at a 25-1 fuel oil mix, use a good quaility two stroke oil.

Oct 09, 2011 | Chainsaws

2 Answers

Fuel to oil mix for jonsered 490 chainsaw ?


its a 50 - 1 mix of 2 stroke oil to fuel or 2 1/2 ounces of oil to 1 gallon of gas

Apr 03, 2011 | Chainsaws

2 Answers

What kind of gas/oil mix does this use


Oil Mix Ratio:
The following ratios have been recommended for the last 10-15 years.
Dolmar, Echo, Efco, Homelite, Husqvarna, Jonsered, Makita, Oleo-Mac, Red Max, Ryobi, Shindaiwa, Solo, Spear & Jackson, Stihl & Tanaka; all recommend 50:1.
1 gallon of premium fuel to 2.6 ounces of quality 2-cycle oil.
4 liters of premium fuel to 80 milliliters of quality 2-cycle oil.
McCulloch, Poulan & Wen; recommend 40:1.
1 gallon of premium fuel to 3.2 ounces of quality 2-cycle oil.
4 liters of premium fuel to 100 milliliters of quality 2-cycle oil.
Chinese chainsaws recommend 25:1.

If you have more questions or need additional help please reply below and I will get back to you. HTH & Good Luck.
Lou
Thank You for using FixYa.

Aug 29, 2010 | Husqvarna Craftsman 36cc, 16 In. Gas Chain...

1 Answer

I lent my saw out and it came back with the fuel lines missing I need to look at a parts manual to see what parts I need I have a Jonsered 2045 turbo


A typical fuel system and a couple of tips:
http://www.fixya.com/support/r3706813-2_cycle_fuel_system_repair

The IPL (exploded parts list) for your saw is the only detail for fuel line routing and it is sketchy at best; components are listed but may be on different illustrations.
IPL courtesy of "gridserver.com" (may not be your saw) You can download an Operators Manual at Jonsered.com but no IPLs.
http://s30387.gridserver.com/partsDiagrams/Jonsered%202041%202045%202050.pdf
Husqvarna is the parent company. I would try a local Husky dealer for parts if JRed dealer close. It often saves shipping cost.
HTH
Lou

Feb 07, 2010 | Chainsaws

3 Answers

Need to know gas to oil ratio jonsered 535 chainsaw


50:1 is the mixture for the Jonsered 535. I bought mine new around 1991 and it's been a great saw.

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