Kingfish22
New member
I have a 1998 150 XL Merc. and have been trying to install a water pressure gauge with no success. There does not appear to be any dedicated port for a such fitting into the cylinder head. I ended up tee'ing it into the tell tale tubing but I get no pressure reading whatsoever. I would love to have it fitted into the block (without drilling and tapping in a new port). Am I missing where there is place to screw in the fitting? I see the temp. sensor... and temp sending unit locations. Model # 0G752730. Any thoughts really appreciated... I installed a temp gauge but the pressure would also be quite useful. Thanks!