is it possible to put a water pressure gauge in Yamaha OX66 200HP motors

[Poorsche]

I've got a pair of Yamaha OX66 200HP motors -- is it possible to put a water pressure gauge in these motors? If so how?

[boscoe99]

Absolutely positively.

There is a port in the top of the cylinder head into which a plug is screwed. Remove that plug and install a Yamaha water pressure fitting. The fitting will connect to a plastic tube that runs to a Yamaha water pressure gauge. The plastic tube screws into the back of the water pressure gauge.

Easy peasy.

[rodbolt17]

use the port side plug.
if you use the stbd side it tends to kink the line.

[Poorsche]

Thanks again for replies that provided answer/information I needed--