Water pressure gauge

[Landrycj]

I am in the process of installing a water pressure gauge on a 2005 115 hp Yamaha four stroke engine. Is the port next to the dipstick on the starboard side of the engine the water pressure port, see picture in URL below?

I attempted to back the plug out of this port and it appeared that the threads may be stripping. I back the plug out one quarter turn and torque continue to increase instead of decreasing, I then screw the plug back, with high torque. Is the torque typically hi to back this plug out? If the threads do strip how difficult is it to repair?

http://www.miterclamp.com/Images/water_pressure.jpg

[boscoe99]

That is the port. The plug seems to be installed with some kind of sealant. Be a man about it and power down on the wrench.

[Landrycj]

Thanks for the feedback.

If the torque to back out this plug is typically high, I feel better about backing It out.

[fairdeal]

well, even if the plug is galled and strips some threads, its not the worst area to access.

worst case, you'll have to buy a tap to chase the threads.

[Landrycj]

If it galls, I think I will use a helicoil to repair it.

[amahaork]

Most likely threads will be destroyed.
Water gauge in my opinion is useless.
Change impeller very easy.