I have had 2 or 3 mowers this last year with what I suspect was diesel and I have no good way of checking either
Once was a loncin chonda motor, the guy was pretty irate and when I sprayed some carby cleaner it blew massive smoke. Drained the tank and I was 90% sure it was diesel. His son later admitted it could quite possibly have been diesel
Another was a sanli from memory
The other was a flat head briggs – the guy brought it down and said he had been trying and trying – the whole deck was smeared in oil out of the muffler – but he assured me he hadn’t tipped it. He realised he bought a jerry can of diesel for his van and had put it in
Only way I can think of is tip a bit on concrete and throw a match at it.
