Antti

Hi!

From where is the pest place to take water pressure to gauge? Motor is old 1988 Johnson V6 225hp....is there some specific place to assempby the hose?

larose481

I would hop over to scream and fly and ask those guys. Tons of knowledge just like this site but all outboard guys.

Twin O/B Sonic

There are a couple of NPT plugs in the plate (exhaust adaptor) that the Powerhead bolts to, starboard side.
Tap into that and you’re golden.

sailtexas186548

There is also a 1/8, maybe 1/4 NPT port that is plugged from factory on top of the block, between the heads just behind the fly wheel that I like to use so you know the pressure at the top of the block.