Winterizing 7.4 efi on stand

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09-23-2012 | 02:53 PM

JETTDOGG

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From: MAINE

Winterizing 7.4 efi on stand

I have a 7.4 efi merc. Engine out of boat/on a stand. It was test run down south but now is in n my garage w/winter on its way.
What are the steps to getting water out of block,fuel cooler,etc...
Any tips and advice?

09-23-2012 | 03:46 PM

obnoxus

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From: Clearwater, FL

Disconnect all water hoses and drain plugs in block....

reassemble and fill with RV antifreeze through the thermostat hole in the intake for added security

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Last edited by obnoxus; 09-23-2012 at 10:01 PM.

09-23-2012 | 09:50 PM

f_inscreenname

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From: Pasadena, MD

I would just drain it. Like said, pull hoses, block and manifold drains and you are done.

09-23-2012 | 11:19 PM

Trash

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Pull all the hoses and drain plugs (on exhaust manifold and block drains) and blow compressed air through them. I drain my block and exhaust after each use.