If you've ever owned a stand up jet ski, you'll know that they are pretty compact and hard to work on with the gas tank in side the hull. So we took the gas tank off and cleaned it all out. We decided to put a jerry can in it's place and just put the gas lines inside so it could suck up the gas but the jerry can was a lot smaller and it allowed for more room. We were having a tough time getting it to go, so we were taking out the reserve line and dripping gas directly into the carb while trying to start it. So gas was dripping into the bottom of the hull. Once in awhile when we would hit the start button it would crank for awhile and then backfire. I guess one time it back fired and knocked the spark arrestor and the pipe apart without us noticing. Next thing I know theres a huge bang, sparks, and then a fire in my new jet ski. Luckily we had a fire extinguisher and got to it soon enough so there was absolutely no damage what so ever done to the ski, the gas lines didn't even melt. It was on fire for probably a whole 6 seconds but it felt like a minute or 2 haha.
Needless to say we got it running about a half hour after but it'll need some work done to it
And before anyone says anything, my dad is a licensed mechanic and we do know what we're doing but we didn't see the spark arrestor come apart as it's beind the pipe and under the hull, but the jerry can idea and dripping gas was a stupid thing to do. But we also didn't expect it to blow up haha, oh well no harm done and I have a good story to tell!