Yanmar 1GM10 Service

[jusw]

I've done the oil change anode change filters etc , I'd like to run the engine up but the boat's out of the water sitting in a boat yard.

Can I simply unclip the inlet hose from the sea cock (ball valve) and stick in a bucket of water and go ahead? Or is it more complicated than that?

Jusw

 

[Leo2]

Beware if the bucket of water is sited higher then the raw water pump, as there is a possibility of syphoning. Once you have stopped your engine lift the suction hose from the bucket of water. (many people have flooded their engine with water by allowing it to unknowingly syphon)


www.boatpartsandspares.co.uk

 

[sailorman]

get a bucket fit a plastic skin fitting in the bottom attatch a 1/2 inch hose. tie bucket just below the exhaust outlet stuff the other end of the hose up the engine cooling inlet fill bucket with water start engine. keep an eye on the water level in the bucket

 

[NPMR]

We've very often just shoved a hose into the water inlet from outside the boat, very securely, turned it on full bore and fired up the 'Yannie'.

No problems so far. If you think about it, the volumes of water involved are quite low. When we've used the "bucket" system, it takes minutes to work its way through the water, so you don't need to fret too much - just keep the impellor lubricated.

 

[smth448]

If you put a hose on the water pump directly you stand a chance of flooding the engine with water with dire consequences. also you are forcing the water into the engine so not testing the water pump.
Take the water inlet pipe off the seacock and put it in a bucket of water. A bucket full will last a 1GM10 a fair amount of time. If you want to run it for longer use a hose to keep the bucket topped up.

 

[lw395]

Only run your engine ashore if you are very sure of your cradle!
The vibration is worse than expected due to no damping from the water, and chocks and wedges go walkabout.
Also don't let the prop turn with the cutless bearing dry.

 

[vyv_cox]

<<< Once you have stopped your engine lift the suction hose from the bucket of water.(many people have flooded their engine with water by allowing it to unknowingly syphon)>>>

Perhaps you would like to explain how water can syphon past the positive displacement raw water pump? In fact, with the impeller in place this just cannot happen.

 

[Leo2]

[ QUOTE ]
<<< Once you have stopped your engine lift the suction hose from the bucket of water.(many people have flooded their engine with water by allowing it to unknowingly syphon)>>>

Perhaps you would like to explain how water can syphon past the positive displacement raw water pump? In fact, with the impeller in place this just cannot happen.

[/ QUOTE ]

I do not wish to get into an argument with you, but it does happen. Water can pass the impeller.

For this reason, boat manufactures, boat builders and pump manufactures, RNLI, Royal Navy etc. fit anti syphon assemblies to their boats and machinery.

We have seen at least three occasions where this has happened on boats we have remedied due to the owners mistake of siting the bucket of water above the water pump.