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#12006032 - 12/27/16 12:50 PM Fluctuating water pressure gauge.
OneFishAway Offline
Angler

Registered: 02/17/15
Posts: 409
Loc: Parker County
I have a 05 Yamaha HPDI 175. Today I noticed my water pressure gauge fluctuating. Never notice it before. No overheating or anything. Any ideas? Thanks in advance. BTW this was noticed at WOT.


Edited by OneFishAway (12/27/16 12:56 PM)
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PB 8.8 Joe Pool

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#12006046 - 12/27/16 01:02 PM Re: Fluctuating water pressure gauge. [Re: OneFishAway]
Huckleberry Offline
TFF Guru

Registered: 10/10/07
Posts: 17129
Loc: Lake Gaston, VA
Could be your thermostat going bad. I had to replace one this weekend myself. Mine was doing it at low idle speeds, buzzer went off one time, my smart craft told me it was my thermostat, that's how I knew.

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#12006056 - 12/27/16 01:08 PM Re: Fluctuating water pressure gauge. [Re: OneFishAway]
OneFishAway Offline
Angler

Registered: 02/17/15
Posts: 409
Loc: Parker County
Ok that shouldn't be too bad. It would fluctuate between 18 and 25 psi. Was also a little slow to come up after getting into the throttle.
_________________________
FTM-PTB-EGH

PB 8.8 Joe Pool

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#12007375 - 12/28/16 11:57 AM Re: Fluctuating water pressure gauge. [Re: OneFishAway]
forkduc Offline
TFF Guru

Registered: 03/28/07
Posts: 11133
Loc: Plano,Texas
Check your intake screens first.

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#12007614 - 12/28/16 02:44 PM Re: Fluctuating water pressure gauge. [Re: OneFishAway]
gary purdy Offline
TFF Guru

Registered: 05/24/03
Posts: 11097
Loc: Littlefield Tx & Lake A. H. US...
Poppet valve assembly needs cleaned or changed.
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�The world will not be destroyed by those who do evil, but by those who watch them without doing anything� Remember what He has done and remember that He is not done yet! GOD IS GOOD

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#12022624 - 01/05/17 04:35 PM Re: Fluctuating water pressure gauge. [Re: OneFishAway]
2jmills Offline
Green Horn

Registered: 08/03/16
Posts: 14
Loc: Texas
I have a 2002 OX66 225 and the pressure gauge never goes below 20 psi with the motor not running. When on plane it shows 60 psi.
Any ideas?

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#12025262 - 01/06/17 08:35 PM Re: Fluctuating water pressure gauge. [Re: 2jmills]
OPTI Offline
Extreme Angler

Registered: 06/23/04
Posts: 1416
Loc: Benbrook Tex
More than likely with the cold weather the gauge has frozen from trapped water in the gauge, see it alot this time of year and only solution is to replace the gauge. Or to I have seen if you remove the line from the back of gauge and it drops to zero there is a restriction in the line from the motor to the gauge if that the case find the restriction or just run a new line.....OPTI


Edited by OPTI (01/06/17 08:35 PM)

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#12025270 - 01/06/17 08:41 PM Re: Fluctuating water pressure gauge. [Re: OneFishAway]
OPTI Offline
Extreme Angler

Registered: 06/23/04
Posts: 1416
Loc: Benbrook Tex
Like Gary mentioned check the poppet valve could have trash in the grommet or the poppet valve spring is weak and not strong enough to hold the water in the block and pops off at a lower pressure or the poppet valve it self is worn and not sealing against the grommet.....OPTI

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#12025921 - 01/07/17 09:06 AM Re: Fluctuating water pressure gauge. [Re: OneFishAway]
gary purdy Offline
TFF Guru

Registered: 05/24/03
Posts: 11097
Loc: Littlefield Tx & Lake A. H. US...
Tip during the cold weather. Disconnect the hose for the water pressure gauge and pour in a little RV antifreeze and re-connect. Enough will remain to prevent the gauge from freezing all winter.
_________________________
�The world will not be destroyed by those who do evil, but by those who watch them without doing anything� Remember what He has done and remember that He is not done yet! GOD IS GOOD

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#12063722 - 01/27/17 08:26 PM Re: Fluctuating water pressure gauge. [Re: OneFishAway]
Hittmanfish Offline
Angler

Registered: 05/28/14
Posts: 308
Loc: Arlington
Where is a good place to buy replacement gauges?

I'm having a similar issue where my water pressure gauge is showing 25 PSI at idle and doesn't go below that when running. My trim gauge isn't working either, so I guess I might as well replace that too.

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#12063748 - 01/27/17 08:39 PM Re: Fluctuating water pressure gauge. [Re: Hittmanfish]
2015fordnut Offline
Extreme Angler

Registered: 06/24/09
Posts: 1819
Loc: Garland, TX
I bought replacements for mine on EBay.
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