This is a video of our most recent yellow lawnmower. It is a 5.5 HP gasoline engine. This lawnmower has already given us a huge increase with running 100% gasoline. We got curious and decided to play around with diesel. We were able to run this lawnmower on 100% diesel. This video shows that there is no fuel at all. We then hook up a bubbler to the flange on the small carburetor. The bubbler contains only 100% cold diesel. The temperature outside that day was in the 30's.