I have accidentally put diesel in a petrol run TCM Forklift, not sure if this is the correct model.
Either way I put about 20 litres of Diesel in the tank and drove it a short distance before realising my mistake. I immediately syphoned the tank and filled it with normal unleaded. Even through all of this when i went to start it it just sh*t itself and wouldn't start. It is turning over, but there is no real sign of the fuel igniting. Im not sure if i have stuffed the spark plugs or completely stuffed the engine. If you have any experience with this issue I would really appreciate your help with steps to take to fix / remedy my problem, including signs of what could be indicitive of different issues that may have arisen from my stupidity.

Cheers!