8V92TA Life

It depends. I've only seen them go 1800-2500 hours in Sportfish......they might go longer in a MY, depends on how they've been run and other factors.....I've seen a pair both have low compression in 1 cylinder with only 889 hours.......but the boat sat a lot........

I've found the local Detroit Diesel dealers are usually pretty good at giving accurate life expectancy figures for the type of boat they're installed in, HP package, and life expectancy.......

Just finished overhauling 2

For what it worth I just finished overhauling both 8V-92 TA DDEC in a Pacific Mariner with less than 2000 hours. Starboard engine cracked a head and put coolant into exhaust and oil. Owner decided to overhaul port engine at the same time. Spared no expense, Rather pricey. BTW this boat is for sale also. 65 footer completely redone inside and out. If you would like pictures let me know. As to engine life it depends on how much power they are putting out and how well they are taken care of. Anything can happen. Big horsepower equals big bucks.
I've got a customer who has 12V-92TA's and they are ready for overhaul. Engine hours around 2700.

not to hijack,,,,,but are they those ultra-modern,space-age,state of the art,non computerized tank gauges i see in the photo ????

It appears so ... with the valves open in order to better feed the fire.

I saw a boat leak fuel all over the marina the other day for that very reason. The owner didn't close the gate valves on the sight tubes and 1 started leaking. It only takes 10 seconds to close or open them, why on earth would one leave them open.

Hi,

Don't let the valve handles fool ya, think about a boiler sight glass vaves.

I thought the use of self closing valves on fuel or oil tanks was mandatory?

Why anyone would use a gate valve let alone a ball valve is beyond me.

All of the newer boats I manage have spring loaded valves that keep them in the closed position. A lot of older yachts I manage or have been on, say pre-2000 have manual valves ball and gate both, that can be left open.

Those Home Depot ball valves don't fool anyone!

Boiler gauge glass valves (at least on propulsion boilers and most large donkey boilers) use this sort of operator ... you pull the chain to open or close. They should be closed after checking the level so a failure of the glass doesn't disturb the watch engineer.

BTW, the valves both operate at the same time by pulling on a chain that passes over both chain wheels. Those valves are located about 10 or 15 feet above the floor plates.

Hi,

Quite an elaborate system there Marmot.

I was led to believe this is what a Donkey Boiler was fitted with.

http://www.spiraxsarco.com/images/resources/steam-engineering-tutorials/3/7/Fig_3_7_10.gif