G'day Norm and Aussietrev

There was never a dual carb model Trev, as this was a reed valve design,
acting through a single G4 carb and reed assembly, directly
mounted to the crankcase.

Your story - of engine replacement - is well-founded in the
Service Bulletins (see link). This must have been a costly
exercise for Victa!

Norm, to my knowledge, the problem was not with engine cooling,
but check the bulletin dealing with overheating of the carby!

The best post on this comes from the great Mr Davis, who reproduced
Victa Service bulletins. It appears the Twin was rushed into service
before adequate testing in the field ... a bit like the infamous Predicta
system on the Automatic.

https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=38878

Cheers
----------------
Jack