1972 Mercruiser 3.0L Choke Heat Riser Tube

[reavesga]

The choke heat riser tube is broken. Does that part just press into the exhaust manifold is the repair to just bend up a new tube, drill out the one in the manifold, and push the new tube into the hole? If so does anyone know the right size drill bit? Should I braze the new tube into the hole when done?

 

[Bondo]

If so does anyone know the right size drill bit?

Ayuh,.... The same size as the tubin' yer gonna use,....

 

[Scott06]

Just pressed in. Usually there is a hot air tube coiled inside the exhaust manifold that this connects to these can get corroded.

 

[harleyman1975]

I did many electric choke conversions on these on older gm cars back in the day...just a thought.