carb setting, wont tick over

[upyourkilt]

my engine is a chrysler 55 hp single carb (tillison) and i have been playing about with the brass srew at the top of the carb ,does anyone know what it is ? is it tick over or mixture and what setting should it be on ? anything under 1/4 revs and it will stall any help appreciated .

 

[roscoe]

Re: carb setting, wont tick over

"Is it tick over? " Huh? whats that? you guys talk funny. Just kidding, but I don't know what you mean by "tick over".<br /><br />Its hard to believe we all used to speak the same language.<br /><br />As for the brass screw, it is the idle mixture screw (needle valve).<br />Should be turned out 1.25-1.5 turn from lightly seated.<br /><br />It is number 15 in the photo in this link:<br /><br /> http://www.mercruiserparts.com/Show...0.1/8B.png&inbr=1725&bnbr=60&bdesc=CARBURETOR <br /><br /><br />What is "tick over"?

 

[Dunaruna]

Re: carb setting, wont tick over

Originally posted by roscoe:<br /> <br />What is "tick over"?

Idle RPM's.

 

[upyourkilt]

Re: carb setting, wont tick over

see its not us brits or the aussies who speak a different language its you yanks , just joking , thanks for your time, you have been a good help cheers

 

[roscoe]

Re: carb setting, wont tick over

Ahhh, I understand now.<br />I'm afraid if I suggested adjusting the tick over, I may get a bop in the nose from some guys.

 

[12Footer]

Re: carb setting, wont tick over

LOL. Well, it is not a tick over then.This c arb doesn't have a screw for RPM adjustment really. It has a cable/cam adjustment for RPM.<br /><br />Welcome to iboats <br /> It is a mixture screw. Be carefull not to tighten it, or bottom it out too snugly, as it will ruin it, and possibly the needle seat too.<br />Start at 2 and one-half turns from bottom.<br />Adjust underway with a warm engine, at fast idle.<br />Slowly, one-eighth turn at a time, turn the screw CCW. Allow at least 10 seconds before going another 1/8"....Do this until the motor begins to stumble (this is rich max). Turn the adjustment screw back clockwise, one-QUARTER turn. The carb is now adjusted.<br />If you have problems with setting a steady speed long enough to adjust it, you have a fuel delivery problem. Clean fuel tank, replace fuel pump diaphram, and rebuild the carb if you need to. There are many Force/Merc experts here, like Roscoe,Eurolarva,qab999 and many others, so post your progress here, or if you have any questions you think they might be able to help you with. Also, the archived posts go back to 2000! --- gobs of posts relating to this,only a search away.