1981 50hp Tilloston Carbs

[RKM]

50hp Mercury serial #6011979. Tillotson Carbs. In the process of a recarb. all has gone ok except for the extra part left over. It is a small rubbber O-Ring. I cannot find it in book or the breakdown I was directed to on the web. Any suggestions?

 

[RKM]

I did not find anything like it when I took them apart. Got a gut feeling these have been into before and all was not put back together right.

 

[beckerjs]

did you look inside the carb at the idle mixture screw

 

[RKM]

Yes Sir. I did not find anything like them in the disassembly. I just have a feeling they belong someewhere.

 

[RKM]

Mr. Beckerjs....(or anyone who might know the answer). I had also made a post in regards to a brass "screw" on the face of the carb. If the carb was on the motor this screw is in the two o clock position . It is not the idle adjustment. It is brass, slotted for a standard screwdriver and has a hole in the center. It looks like a jet. Is that what it is? In any case im missing one. Just trying to figure out what is is.

 

[beckerjs]

You might be refering to the vent jet, it vents the float bowl. Providing less than atmopheric pressure to the fuel bowl at mid range, which results in improved fuel economy (quote). You can change the size to make it richer, no jet = richer.

 

[beckerjs]

there are often parts in a kit that don't get used on every aplication, 1 kit for many carbs...jb

 

[coueytwo]

mercury part number 139-55733, JET-.092

 

[fastjeff]

May be the utterly useless and unnecessary jet gasket. I toss them out.

Jeff

 

[RKM]

Thx for all of the help.

 

[galamb]

Usually only see an o-ring on either the float valve seat or the drain screw (if equipped).

But as JB notes, carb kits often cover many models - OMC's are the worst - I end up with more gaskets and seals left over than were used on the carb...