Quote:
Originally Posted by MAXUM
Funny you mention this as it seems opinions vary. I backfill my block and also the risers and stern drive till I hear it pouring out the intake so I know the impeller housing is full of it too. Takes 3 gallons to do it all and I guess I feel better doing so and have a simple reason for that. If there is any raw water left anywhere it will be mixed with the antifreeze and thus cannot possibly cause a problem. If I can't put 3 gallons in I know something didn't completely drain and I have to find out why. It's hard to gauge how much comes out when draining, refilling is the only way I have comfort in knowing things drained right. It should also be noted that antifreeze has a rust inhibitor in it, at least the stuff I use. Whether it is in the least bit effective or not is a different story but hey I feel better with it full of antifreeze versus not.
I know somebody that just drains the block, risers and manifolds and leaves it as is. Never had a problem either.
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Wow, in the new England winters? I do know this is a very hot debate. I didn't even think about draining or filling the lower unit. That should just be another hose off the t-stat right?