Where are the drain plugs to drain the block on an indmar monsoon?

you have two brass plugs (sometimes can be knock sensors) on either side of the middle of the block. They should be pretty obvious when you look at your block. If you are winterizing, Remember to drain your manifolds, thermostat housing hose, and your raw water pump housing and take out your impeller. <BR> <BR>(Message edited by Jon A on December 04, 2006)

Also if you have ballast pumps, they need a blowout!

Alex you have one knock sensor and one drain plug on your motor. Other than that follow what jon said and you will be set.

Why do you take out your impeller.

It will dry rot.