Kohler Command Pro 27hp Connecting Rod Bolts Torque?

[Turbodriven]

The Kohler manual says:

Three different types of connecting rod bolts have
been used and each has a different torque value. If 8
mm straight shank type bolts are used, torque in
increments to 22.7 N·m (200 in. lb.). If 8 mm stepdown
bolts are used, torque in increments to 14.7
N·m (130 in. lb.). If 6 mm straight shank bolts are
used, torque in increments to 11.3 N·m (100 in. lb.).

But my bolts are 10mm? Or to be more specific, they take a 10mm socket. Straight shank for what it's worth. Are they talking about the thread measurement? I feel like they would have called it M6 or M8 if that was true? I don't want to over (or under) torque these vital bolts.

 

[ILENGINE]

Bolts are measured by thread diameter not what wrench is used.

 

[StarTech]

Screw size are the diameter of main part of screw (yes the threads) and not the hex head. Now a M10 step down screw will an un-threaded portion that is 10mm and a threaded section that is 8mm.

Normally M6 Flange head screws uses a 10mm wrench or socket. M10 flange head screws normally uses 13mm wrench or socket. But may had these specially made so head size might not be correct.