Help Sachs Dolmar 120 Super

[sidehillgrowler]

My Sachs Dolmar 120 super runs good when not cutting. Rev's up ok but usually will dies within half a minute. I took it to the chainsaw shop and the mechanic said there was fuel coming out when you lay it on it side where the fuel line attaches to the fuel tank. The part where the fuel line attaches doesn't look like the one in the parts schematic for the saw so he doesn't know where to get a part that matches it. If you look at the picture it leaks out of the top of the black button looking part where the fuel line attaches. I'm attaching pictures and maybe some of you with a Sachs 120 could look and see if this what you have.

 

[pioneerguy600]

Have a look at this IPL below, my 120`s use part number 17 for the fuel pickup and vent lines,

http://s30387.gridserver.com/partsDiagrams/Dolmar 112 114 117 119 120 and 120S.pdf

 

[sidehillgrowler]

That is the same parts diagram that the service tech was looking at and it doesn't match what is on the saw so he didn't know what to do. This saw doesn't have a primer bowl as some saws have.

 

[pioneerguy600]

The line with part number 17 in it does not use the primer bulb, this unit allows for a feed line to the carb and a nipple for a vent line that runs up behind the carb air box. Most 120S saws had the primer bulb, I have both versions.

 

[sidehillgrowler]

The part on line 17 doesn't look what is on the saw from the picture I posted. So is there another part for this saw?

 

[pioneerguy600]

Is it possible someone put the wrong part on there? Parts for these saws have been difficult to find for close to 20 years .

 

[psuiewalsh]

I think it's missing the top of the valve. That is why it leaks fuel. The 120si used the same plastic tank with no primer setup I believe.

 

[psuiewalsh]

https://www.ebay.com/itm/184142419086

 

[sidehillgrowler]

Thanks for all the replies I ordered the fuel vent part hopefully it clears up my problem.

 

[sidehillgrowler]

okay I ordered the fuel vent a little different than the original but it fits. I have to put a little fuel in the carb to get it to start. After starting it runs strong at high speeds but as soon as I let off the throttle it dies. If I let the throttle down slowly it runs for a few seconds. Any thoughts would be appreciated.

 

[psuiewalsh]

Sounds like low side of carb needs adjust or cleaning if it's rich enough at full throttle.