old 3.5 carb with no high speed

[nitrorc5]

a friend gave me a boat with a 3.5 k&b engine but when i turn it on it only reves than stops.im prety sure its not the lines but the card only has a needal to control the fuel not the air is this normal it also does not goin to the carb hole all the way(half milimeter gap)is this normal.
thank you

[MECOA]

I'm not sure if this answers you question. The 3.5 carb only has a main needle valve. No air mixture adjustment for idle.

Look at the exploded view...
http://www.mecoa.com/kb/carbs/carb35.pdf

and read this
http://www.mecoa.com/faq/carb/needle_marine.htm

[nitrorc5]

yea thats it except the nedal is round at the end with a brass grip but theres a littel stump at the end where i think the wire brok
and the body is iron not red black or gold
are these the same carbs?

[MECOA]

No carbs had an iron body. Perhaps you have a perry carb, black or silver plastic body with a brass mixture control disk on the side where the needle goes.

or does your engine have an exhaust throttle? This type would have a fixed wide open venturi (carb) on it.