Uploaded June 2020 | Updated September 2026, 6 hours ago

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Video showing some fuel mixture testing. This engine was previously modified for use in a non-aviation application in the United States, probably a hydroplane or tractor puller. The fuel system was adjusted to suit higher rpm and boost pressures requiring rich running. I am feathering the slow running fuel cut-off control to weaken the mixture in order to ascertain at which speeds it is over fuelling.