National Heritage Machinery Association's 2019 rally to be held in Murray Bridge

Jayme Marshall readily admits his hobby has become an obsession.

His yard is filled with every manner of old engine, salvaged from farms or snared at clearing sales.

But he will be among his own kind this weekend, as more than 500 exhibitors descend on Murray Bridge for the National Heritage Machinery Association's annual rally.

Mr Marshall and a friend took an interest after they restored an old chaff cutter so his mum could feed her horses.

He bought his first machine, a seven-horsepower Austral used to run a shearing shed, for $3500 from North West Bend Station at Morgan.

Over the past 20 years his collection has grown to include water pumps, industrial engines, generators, grain grinders, stone crushers, tractors and road rollers.

"There's still a few out in the wild, but they're getting harder to get," he said.

"Thirty years ago it was all the old people who remembered using them ... now it's becoming a niche because they're all around the 100-year mark and it's cool again.

"If you get an engine that's absolutely knackered and needs a full resto, it gives you real buzz when you get the first fire out of it or see it running the way it should."

The rally will be held at Sturt Reserve from 10am-4.30pm on Friday and Saturday, March 22-23, with a 3.30pm finish on Sunday, March 24; and will feature a vintage tractor pull, paddlesteamer cruises, blacksmithing, classic cars and more.

Admission is $15.