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4 cyl Grey winterizing

Old Marine Engine » Gray Marine Gas Engines - 4, 6, and 8 cylinder » 4 cyl Grey winterizing « Previous Next »

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Joe Knight
Member
Username: busboy

Post Number: 8
Registered: 12-2015
Posted on Tuesday, November 03, 2020 - 09:16 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Can someone help me with the correct winterizing of my Grey 4cyl
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miro forest
Senior Member
Username: miro

Post Number: 1105
Registered: 11-2001


Posted on Wednesday, November 04, 2020 - 06:25 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

The 2 main things are
a) drain the water from the engine block. There a re usually 2 valaves or pipe plugs. One is on the side - kinda hidden. Once you think you've drained the block, start the engine for about 10-15 seconds - that will blow out any water from the water pump and the exhaust system. There also might be a drain valve on the water pump - if there is, open it before you start the engine.
If the exhaust manifold has a plug - take that out to drain it.

b) drain the carb bowl. I have found that leaving fuel in the fuel pump over the winter doesn't do anything bad and helps start up next spring.

And for next spring, I have found making an adapter that lets me run some water into the manifold helps with getting the water pump to work.

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