Mercruiser 5.7 Winterizing

[flystrong]

Winterized my boat last night as per manual and am happy with the result apart from the starboard riser seemed to have not a lot of water in it. I firstly removed the block drain plugs (starboard first), then removed the riser pipes (port first). When i removed the starboard riser pipe there was only a small trickle of water. Would the riser have drained through the block leaving only a small amount of water of could it be something else?
Many Thanks

Richard

 

[Dirty Dawg]

Re: Mercruiser 5.7 Winterizing

Try poking the hole with a small piece of bent coat hanger. You may have scale rust etc. blocking the opening and preventing it from draining. Same thing happened to me, I had some trouble getting a plug out and I was all set to screw the drain plug back in. Remembered that I had not checked the drain with a wire, sure enough another gallon of water came out with some junk as well. Careful don not want to crack that block!!!! Ike

 

[JustJason]

Re: Mercruiser 5.7 Winterizing

yep you need to do it again and stick something up the hole. You should get equal amounts of water out of each.