lukeshort

Low end needle was removed and reinserted. Book says start with 3/32 to 1/8 space between the needle and spray bar. But the parts don't match the sketch in the book. The spray bar goes all the way across the carb throat and is evidently slotted on the bottom so there is no way to determine any clearance. So engines recommend to start with the end of the needle screwed in flush with the carb body to start. What do I do to ge a starting point for this thing?

JohnBuckner

My Feedback: (1)

Perhaps look agine with the throttle open?

lukeshort

Thanks John but the throttle is open all the way and the spray bar is easy to see. What next?

da Rock

From the specs info on Tower's website for the Tower .61:

Tower really does give full info on most of their stuff, don't they.

lukeshort

Thanks, da Rock. Took carb offf and set the needle as you said. Was easy when you know how. What I like about this hobby. Always something new to learn even after 70 years.

w8ye

My Feedback: (16)

There are two different designs on the Tower carb

The old ones have the space between the idle needle and the bar when at full throttle

The newer ones line the end of the needle up with half way across the notch in the spray bar when at full throttle

lukeshort

Adjusted carb per Da Rock and did an engine test at the feild this AM. Turned low end screw in another 1/2 turn and ended up with hi end needle set at only one turn out. Engine ran very slightly rich but smooth at 9,800 - 10,000 and idle at 1,800 - 1,900. Thanks again guys.