Where are the water drain plugs on omc 120 hp with omc 400 sterndrive
Ayuh,..... Welcome Aboard,....... As Scott says,.....
You'll find the manifold drain on it's bottom, 'bout center, or slightly aft of center,.....
It'll either be a 1/8" pipe plug(7/16" wrench), or 1/4" pipe plug(9/16" wrench),......
Just below it at the bottom of the block, just above the oil pan, is the block drain, a 1/4" pipe plug,.....
'n pull the big hose off the circulatin' water pump on the front of the motor,.....
It hides 'tween a pint to a quart of water,.....
The drive,..?? Lower it,....