Asim:

We use to use a hair blower set on no or low heat. Have son hold it by drain hole. Don't want to build up to much pressure so hold/move away - hold/move away. Get a squirt bottle full of very soapy water. Spray all over boat connections and hulls. Where bubble shows is a leak. If a bleed hole leave open. But look for cracks. My Mystere 4.3 was taking about 1 1/2 gallons in starboard hull from small cracks. I used some PC-11 two part epoxy from Kemah Hardware and and a cheap puddy knife and now not a drop. Cheap $5 fix.

Hope this helps and when will we see you at Dike again?

Doug