Help on Napier truck engine

I am a boat person looking for help on a truck engine.
I have an old fishing boat in Tasmania. A chap who worked on the boat as a boy, in 1952, said she had a Napier truck engine. He said "21 hp, has 12 spark plugs in her, 6 cylinders. She started on petrol, then switched to kerosene".
I can't find anything about Napier trucks or engines in Australia in 1952. Can anyone give me any leads?

Des
GuddayM8
Welcome to the truck forum

if u could get sum pix of the beast
this could help
I'll putup a pic of a Napier in Queensland n th@ might jog sum memories of the owners name 4 U
as he might have dun the ground work of findin bits etc



1912 Napier at the TWU day 2007 Brisbane, Queensland, Australia.


HCVC Truck show @ Chesterfield Farm Melb

Cya
[ch9787]

Ian Fordyce, ACES auto electrical (Auto Craft Electrical Service), Dyson ave, Sunnybank, Brisbane owns the one on the back of Swishy's truck. He's a nice bloke, but keep in mind if your giving him a call that he's running a business that he is pretty much the main part of when you give him a call. I havn't got his number on me, but that should be enough info to get it.

I think Napier were also into aircraft engines later on.

Napier designed the Leyland 300 diesel motor as fitted into the 1949 Comet. All development after that was done by Leyland. I think Napier had involment in a lot of projects around that era but didn't actually make much themselves. As a truck maker their last effort was a 2 tonner after ww1. They developed a 3 wheeler but sold rights to Scammael in 1931 and it became the Scarab

Napier's diesel in 1940s & 50s were primarily used in boats & locomotives. They even designed an aviation diesel.
The 2 cycle engines were of the opposed cylinder design to which Commer probably owes a debt.

Jules