G'day Bumps,

The standard outer spring for most 160cc engines [both full crank and PowerTorque] on mowers is the CRO3417A. But it would help to pin it down, if you could post the model number, or some pics of the mower.

This spring sets the governed speed of the engine, and each 50g increment in spring constant will increase the speed by 100-150rpm. You really need a tachometer of some sort to check this.

There's a collection of Victa Service Bulletins on the G4 in this past thread: https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=38908

See also the Service Manual G4 excerpt in Section 4 HERE

Cheers,
Gadge

"ODK Mods can explain it to you, but they can't understand it for you..."

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