MTFCA Forum

I have a brass carb with a bent throttle arm up by where the lever from the steering post enters. I am thinking about heating it with a torch and bending it after it cools. May have to do a a few times if it work hardens too fast for one try.
Here's my question. Can I do this on this part considering it is a bronze casting. I've done it on extruded brass but never on a casting.

You have the right idea...go slow...minimal bends between heat cycles...bend stone cold...good luck...you don't appear to have much work to do so I would not personally be too worried.

Richard judging from your picture that’s a 4500, be gentle my friend. Scott’s right on the cold bend. I will say on a not so valuable arm off an H1 with a similar twist I slowly tightened a vise on it to straighten the throttle arm. Your mileage may vary.
Best John

Thanks Scoot and John. It is a Holley 4500 so I don't want to mess things up. Scott, would it be OK if I sent you an email re running this carb thru an ultrasonic cleaner. I purchsed a small unit and a gallon of cleaner but there may be some precautions re the type of cleaner, temperature etc . This will be a first for me.

Richard

that would be fine

If the bend you are referring to is the small twist in the arm, it should be an easy task to to take out that twist. Do it cold, as suggested. I'd use a 6" crescent wrench to do the twist, allowing the whole length of the arm to take the twist. The arms are not very hard.

Allan from down under.

Got 'er done. Carefully heated the arm, let it cool and bent it straight. Took a few passes as I was very careful and went slow. I still. need to bead blast the arm to remove the discoloration. Thanks for the comments.