How to winterize 455 olds/Berkeley Jet/Nicson Manifolds

[twowheels]

How to winterize 455 olds/Berkeley Jet/Nicson Manifolds

Trying to figure this out, coming from stern drives.

My hot-rodded (by others) Rally Sport Hombre has a water valve, then a spigot coming from the right side of the berkely at the transom. From there it tees to the front of each Nicson manifold.

I tried closing the valeve from the jet drive transom and [gravity] feeding RV antifreeze into the spigot, but only a little went in (and none seems to have come out!?).

I'm guessing that the jet feeds the water jacket by way of the manifolds (which seems backwards), and then the water dumps into the back part of the manifold?

Am I going to be able to gravity-feed antifreeze at all? Can't figure out any other way.

HELP! Feezing weather is here. Had the boat for a couple weeks only.

Thanks,

Dave

[givemeaboost]

Why don't you just drain everything so you are sure?


Ken.........

[slowaction420]

Drain 1st block exh and all hoses get out as much water as you can then you need to pump non toxic anti freeze in with a wash down pump or jabsco puppy pump or somthing while it's running treat fuel and fogg with marlvel mistory oil
good luck