water pressure gage not registering

[boneyjames]

Here I am again. 2008 Yamaha 115 4-stroke, water pressure gage not registering. Was told won't work on hose hook-up. Took it out on the water at 3800rpm, gauge does not work. What next ? Kink in line maybe, is it something coming out of the block I can check. What is preventing pressure from going through that tiny hose that hooks into the gauge ??? Don't want to spend $300 to find out from a shop. HELP! HELP!!

Thank yoU!!!

[boats.net]

Could be a kinked or plugged up water pressure line, or could be water pump problem.

[boneyjames]

water pressure gauge

How do I check this? I put a compression hose on the line I disconnected from the block.

[boats.net]

Apply air pressure to tubing, no more than about 20 psi air pressure and should see gauge needle move.

[boneyjames]

water pressure guage won't register

Apply air pressure to tubing, no more than about 20 psi air pressure and should see gauge needle move.

But where do I disconnect that from to put the air pressure to the tube??

[boats.net]

Disconnect it from engine block or from back of gauge.

[boneyjames]

water pressure line

Could be a kinked or plugged up water pressure line, or could be water pump problem.

Do I need to put boat in water since not enough pressure from engine with garden hose when I test it out---after I re-route water pressure hose that I know is kinked..Thanks

[boats.net]

Yes it may not show any pressure running on flusher.