repairing diesel engine on the dry

[leogallant]

Sorry, thought it was from his channel. I'll find the one I meant and post a link.

[Minnewaska]

I've done this a thousand times with outboards, as The hose water just spills around the "muffs". Some even have hose fittings.

However, I dislike running the diesel on the hard, particularly if you're up on stands. The vibration worries me for starters. If you pressurize a hose into some diesel raw water cooling intakes, you very well may flood the cylinders. Trying to draw from a bucket is a good solution, but you need a space where bucket overflow and exhaust discharge can freely spill to the ground. Oily, diesel exhaust can be messy, albeit you are also pumping it into the water during the season. Finally, if you're drawing from a bucket, it most likely needs to be very close to the level of the hull intake. Your pump may not have he lift to get it up from the ground.

I do winter work, close all seacocks, and test after launch.

[TQA]

Originally Posted by FSMike

Why not just stick a hose into the raw water intake?

Bad idea in principle due to the risk of getting water into the engine via the exhaust.

Bucket in cockpit idea is much better.

[leogallant]

Here's the link I was thinking of. Not MaineSail but a good example of "how to"

http://youtu.be/F5SxA4tZlOk

[Rockter]

Putting a hose onto the intake will work, as long as you do not leave it running pressured with the motor off. If you do, you will fill up the exhaust system and at least one of the cylinders with water, and possibly the sump too.

The bucket is a better idea, really. Have a friend use the hose to keep the bucket topped up. Don't let the water level in the bucket drop too low, or the cooling system may get air-locked with a slug of air. This tends to happen with an older (and worn) water pump.

Have the friend keep checking that water is coming out of the exhaust.

Be careful.

[Stu Jackson]

Never, ever, never, ever connect a hose directly to the engine rw intake. Never.

Here's that "missing link"

Winterizing A Diesel Engine On The Hard - SailboatOwners.com

Not very hard, explains it all.

[Rockter]

Stu Jackson :

I must just be permanently lucky then.
I have done it quite a few times.
As long as the engine is running when the hose is pressurised, and the hose turned off before the motor is stopped, there is no way on this earth that water pressure will ever be able to beat exhaust pressures.
I am not keen on the idea if it can be avoided, but it is self-priming and is far easier than filling a bucket. When you are working alone and trying to balance a bucket, it has advantages to use a hose (with a stop fitting on the engine end of it).
.

[boatpoker]

Originally Posted by Stu Jackson

Never, ever, never, ever connect a hose directly to the engine rw intake. Never.

Here's that "missing link"

Winterizing A Diesel Engine On The Hard - SailboatOwners.com

Not very hard, explains it all.

+10 .... Absolutely Correct !

[hellosailor]

Rockter, when Stu says "Never" that's because sooner or later, most folks will have an accident leaving the water pressure ON when the engine is OFF. In your case you are manually ensuring that the water pressure is OFF except while the engine is running. That's great, as long as you never make a mistake or get interrupted.

What Stu says is safer. If folks do it his way, they simply can't have the accident that you can. That's just called good engineering, i.e. setting up things and procedures that guarantee an accident can't happen.

[Stu Jackson]

Originally Posted by Rockter

Stu Jackson :

I must just be permanently lucky then.
.

No one is ever permanently lucky.

For proper attribution, it's not my method, Maine Sail did that video.