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starting egine w/ no water

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Old 03-25-2009, 08:35 AM
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Default starting egine w/ no water

Can you start up an engine for 30 sec. without water and not break anything?
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Old 03-25-2009, 08:42 AM
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I dont know about a closed loop system, but i was told with an open loop that if you start up the motor without water you could burn up the impeller.
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Old 03-25-2009, 08:43 AM
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Not likely. You will damage/fry the impeller in the SWP in as little as 3-5 seconds. If you have a plastic SWP, you will likely melt/damage the pump housing as well.

Closed cooling systems STILL HAVE a SWP and a sea-water side of the cooling system. Thus the same applies to an "open loop" and "closed cooling" system setup as well.

"Closed cooling" usually means only antifreeze touches the internals of your block, depending on the setup/model/plumbing.

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Old 03-25-2009, 08:43 AM
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You will hurt the raw water pump impellar. Otherwise the engine will be OK for thirty seconds.
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Old 03-25-2009, 08:44 AM
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remove the belt,,,it wont hurt the impeller,,you should be find for 30 sec
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Old 03-25-2009, 10:53 AM
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Quote:
Originally Posted by TWIN-SPINS View Post
remove the belt,,,it wont hurt the impeller,,you should be find for 30 sec
You have a belt in your outdrive?
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Old 03-25-2009, 10:56 AM
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Quote:
Originally Posted by johnny g View Post
You have a belt in your outdrive?

You must have Alpha drives.......Bravo pumps are on the motor.



I wouldn't start it, the engine would be OK, impeller and housing won't survive.
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Old 03-25-2009, 10:59 AM
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Originally Posted by Sydwayz View Post
Not likely. You will damage/fry the impeller in the SWP in as little as 3-5 seconds. If you have a plastic SWP, you will likely melt/damage the pump housing as well.

Closed cooling systems STILL HAVE a SWP and a sea-water side of the cooling system. Thus the same applies to an "open loop" and "closed cooling" system setup as well.

"Closed cooling" usually means only antifreeze touches the internals of your block, depending on the setup/model/plumbing.
aha...i learn something every day.
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Old 03-25-2009, 11:00 AM
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30 seconds is far too long. Engine can run for a few minutes without water. Impellar only a matter of seconds. If you have a bravo style sea pump you can pull the belt on the pump. At that point it seems far easier to just hook the boat to a hose. If you have allready run the engine then go ahead and change the impellar to be safe. Closed loop or open, fresh water still is fed to the sea pump.
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Old 03-25-2009, 11:05 AM
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Why?
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