Reply To: 2008 GV250 not wanting to start. May 16, 2020 at 2:56 PM #4431 Simon👤 Member Topics: 1Replies: 353 Your low range jetting is blocked by the sounds of it, going on what you said about the old fuel (which goes likle varnish) when left. Ultrasonic cleaning in order, a quick thing to check is there an air leak around the manifold.