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Help!! Heli coil insert tap and installing tool problems

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Mr.Pontiac:
I recantly bought a special 7/8-20 SFI tap .940 o.d. size for the 7/8-20 heli coils, after installing tool into fuel inlet area it bottoms out to bottom of carb. to hold heli coil insert.,Groove is approx. 3/4 deep. am i using wrong insert tool?? advice please.

Cliff Ruggles:
Did you purchase a genuine Heli-Coil brand kit, or something else?....

Mr.Pontiac:
Heli coils themselves are a brand kit of 5 in a package, Tap was purchased with advice from Heli coil themselves.

tayto:
I've taken taps to the belt sander in order to get threads "deeper" I would guess your Heilcoil tap was not cheap though.

Cliff Ruggles:
So it's not a genuine Heli-Coil tap?

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