I have a 53 Hatteras. It has 2 banks of 4 8V195's. I have the 8V71N. I recently purchased the boat. Owner hadn't used much in the past 2 years so I'm having a lot of small issues to work through as I crank everything up. All my batteries were shot so I've replaced 1 bank with the 8V195's and have another 4 on order. Got them for $275 for what it's worth. During my sea trial, I was told by my desiel guy to hold the shutdown button while I hit the start button. Do this for up to 60 seconds to build pressure before releasing the stutdown button. My understanding was this limits the smoke and was just the norm thing to do with this vintage. I live in the Great Lakes so colder water so this may make sense given I don't have block heaters. Two questions, is this typical cold start process others are doing? Two, when I did it yesterday, my new battery bank died after about 40 seconds. Is it really possible it killed my new fully charged batteries after only 40 seconds cranking the engine or were they really not fully charged and I have another problem? Seems wierd to me it killed that whole bank in such a short period of time. The new bank had been charging about about a week prior to this start. Any advise would be appreciated.