Help!! Heli coil insert tap and installing tool problems

[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?

[Kenth]

The tap in my Heli-Coil kit is "bottom style", no issues.

[Cliff Ruggles]

There is a company that offers the both the 7/8"-20 and 1"-20 taps, pretty sure they are called "Recoil".

Those taps will not work well if at all.  I bought one for 1"-20 threads and it was useless.  Had to source out a genuine Heli-Coil tap and it works fine.....FWIW.....Cliff