Tweet
Hi all I’ve got a Yamaha f40bet 2004 model it start idles fine but when take it out and put it under load it seem to get up to about 4/6 knots then dies I’ve had carbs off ultrasonic cleaned three times new fuel pump, fuel lines, fuel filters new spark plugs but still not able to get more than 6 knots and bogs down any help would be much appreciated cheers