Starting My 6-92s while the boat is beached.

Removing the impellers is good if your going to run them dry. How long you run them will determine what else needs to be done. I am in a yard where gensets are regularly run out of the water at full load so anything is possible.

Closing the exhaust pipes is something that comes to my mind!

Spray them in with T9

What was really done to winterize them? This may have to be done again.

Expanding exhaust pressure may disturb any settled antifreeze in the raw systems even if run for just a few seconds. Plan on pumping coolant/antifreeze back down the system. You are not going to bring anything up to temperature. No exhaust discharge protection with out raw water flowing.
If you insist on running them, I suggest several water hoses dumping into the strainer (sea cock closed) and run normally protecting the exhaust system. Then re-winterize.

I am sorry your ship is sitting.
Hate it when that happens.

I wouldn't. Just wouldn't. I'd make sure it was correctly winterized, double and triple check and leave it alone. Just seems to me that any scheme involving starting the engines has very little benefit and more risks than benefits. It doesn't appreciably change the fact they're sitting unused and sitting two years isn't a death knell by any means.

Hand rolling them may squirt some fuel into the cylinder. Washing away any oil still on the rings.
Unless you ran them dry, this could be counter productive.
If it was mine, let them sit.

It bugs the heck out of me when my engines sit for weeks. I can understand it's probably a buz in the back of your mind looking at two years.

Just pouring in fuel treatment without it circulating may be a lost cause also. Do you have plastic fuel tanks?

I'm sorry to keep the negatives coming.

Now, ship your ship south and we can warm it up for you and run her often.......

If you haven't seen this set up yet here is a link to it. http://www.groco.net/seacocks.htm. Groco has a combination flush and emergency pump out valve that lets you idle the engine with dock water and pump in antifreeze for winterization. Go to the site and click on the Engine Flush Kits. They have a pluming diagram there as well. It is not inexpensive but it does offer a lot of utility.
David

Your welcome. Let us know how it goes.

What size hose do you have?

I have a set of 2 1/2" SSC-2500's that have never been used, I can sell you for half of what new ones are going for?

Still in the boxes.

Let me know.

Any one else with 2 1/2" intake hose?

Mine are 2 7/8 as well.