Found a great link on Leak Down test's

http://www.carcraft.com/techarticles...er/index1.html

Not that I plan on doing one myself, but still interesting article.

is number 7 the common bad cylinder ?

Does a compression test tell you the same thing as a leak down? If not then please educate.

Compression test gives you what the cylinders will build in pressure,,a lead down test will tell you the condition of the rings and if the valves are sealing properly..

what is the minimum amount of air pressure that should be used for a leak down ?

Use 100 psi.....it makes the math really easy!

does less pressure say 32 psi not provide sufficient results

u r gunna need a bigger air compressor

You got a bicycle tire pump your using?

Im looking at buying another boat and the guy did a leak down using 32 psi ..my mechanic will do a 100 constant pressure ..just looking for opionions