Hi guys,

I'm trying to remove the flywheel from my TECUMSEH engine, but it won't budge. I found a puller in the shed, but need to get some bolts for it. One thing I noticed is the holes in the flywheel to screw the pulley into aren't tapped .. just wondering if anyone has tapped them before and can suggest a thread?

[Linked Image from i998.photobucket.com]

According to my Digital Calipers, I get a reading of,

- 5.7mm
- 0.22"

I grabbed a 15/64 drill bit and it seemed to fit into the hole (pretty snug fit).. and according to this website,

http://www.engineeringtoolbox.com/fractional-decimal-equivalents-d_1159.html

a 15/64 =

0.2344"
5.95mm

So should I tap the next size up?

Tap with M6 / M7 (course)

Tap with 1/4"

Because the hole looks to be an imperial size.. should I tick with imperial tap/bolt sizes ?

Thanks smile