got flames commimg out of the pipe is that normal??

My project is still going have changed A few things the servo box failed it kept the water out while it was closed once I released the pressure seal it let water stored in the lid straight in, what a bummer should of tested it before
Mounting the servos. For the new box I have used brass ball bearing catches to hold the top down and whether seals to make it water tight got some very minor leakage nothing a bit of sika can't fix. Also changed the stuffing tube and the carbi linkages the later design should have less hassals , engine seems to be running ok almost reaIdy for testing