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Solo 650 VA


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Greetings tree people. I was given a Solo 650VA saw a while back. After an exhaustive search for someone that would even look at it or for carb parts etc I have decided to take a look myself. I have been able to get it to run by squirting fuel directly into the carb but it seems to have a fuel draw problem.


I have checked fuel lines and that the tank is airtight etc. Now I'm more of a diesel Land Rover person myself and 2 strokes with tiny screws and sausage fingers do not mix. Anyhow now that I have disassembled it, and taken the "that will never work again" comment from my wife. I have discovered a third pipe that seems to originate from the crank case. I am guessing this is to either pressurize the fuel tank or create a vacuum in the carb to draw the fuel. But the carb only has 2 locations for connecting hoses and the pipe from the crank case has a screw in the end. So I sit here at my keyboard with petrol soaked oily sawdust on my head from scratching whilst pondering. Hoping that someone can point me in the right direction and prove my pessimistic wife wrong.


Thank you in advance





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there is always one pipe coming from the crank case to the carb, this produces pulses to operate the carbs diaframs.

so your saying there is a seccond pipe coming from the crank case? my only guess is that it is actually a breather from the oil tank.





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  • 13 years later...

Hi Wurzel, I am the owner of a SOLO 650VA chainsaw which my father bought in 1976 and still I am using nowadays with no problems and great performance! Having said that, from the pictures I see in this post, it is very clear the WRONG assembly of your chainsaw fuel lines: the BLACK pipe connected on the left side of the tank which goes to the carburator must actually be connected in the place where the breather/vent pipe (the one with the screw on its top) is now connected and vice-versa. The black pipe is the fuel intake to the carburator; The nipple on the left side of the tank where is now connected the BLACK pipe, it is in fact the breather of the fuel tank to prevent its vacuum. The metallic clamp just under the breather screw it serves to hold it upright in place with the same assembly screw that you will use to mount the white plastic carter that also covers the ON-OFF switch. Last detail: you should make sure that one of the fuel intake pipes is connected to the fuel draft filter from inside the tank. Hope my eplanation is clear enough to help you start again your chainsaw. 

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