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#11537375 - 04/12/16 01:57 PM Speedometer inop???
RickS Offline

Registered: 08/08/13
Posts: 213
Loc: Santa Fe NM
I have a 97 Nitro 800 with a mercury 150xr6. My speedometer hasn't been working. In the past there is a pickup hole on my lower unit that has gotten plugged. Anyway I cleaned it and still didn't help. I'm wondering if it's the actual speedometer itself. It's actually stuck at 20 mph. How do I bench test it? Is there a water pressure specification for the speedometer? Thanks for any input!

#11537407 - 04/12/16 02:12 PM Re: Speedometer inop??? [Re: RickS]
steve@hydrodynamics Offline
TFF Celebrity

Registered: 08/25/06
Posts: 6826
Loc: Quitman,Tx
just my input.

pull the gauge out and throw it away. instal a gauge like an engine water pressure gauge. smile

but.. to "test" it.. pull the hose off the back of the gauge and see if the needle drops to zero.

#11538050 - 04/12/16 05:51 PM Re: Speedometer inop??? [Re: RickS]
centexChamp92 Offline

Registered: 05/21/13
Posts: 24
Same thing happened with my '92. Each gauge would stop over time and eventually i just replaced them. They were either all stuck or wouldn't be accurate. Solid advice above.


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