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Dec 30th, 2023
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 Electronics question
#13222153
07/22/19 05:25 PM
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Joined: Nov 2006
Posts: 45
txbasshound
OP
Outdoorsman
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OP
Outdoorsman
Joined: Nov 2006
Posts: 45 |
My tach and speedometer both quit at the same time. 1998 Mariner Magnum EFI 150 1998 Astro. What do the two have in common?
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Re: Electronics question
[Re: txbasshound]
#13222296
07/22/19 07:57 PM
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Joined: Mar 2010
Posts: 25,786
T Bird
TFF Guru
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TFF Guru
Joined: Mar 2010
Posts: 25,786 |
Okie by birth, Texan by choice. ![[Linked Image]](https://texasfishingforum.com/forums/pics/userpics/2021/01/full-47849-80883-111.jpg) USAF "Thunderbirds" Alumni 1985-1989
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Re: Electronics question
[Re: txbasshound]
#13222606
07/23/19 01:37 AM
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Joined: May 2011
Posts: 1,869
pil,b
Extreme Angler
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Extreme Angler
Joined: May 2011
Posts: 1,869 |
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Re: Electronics question
[Re: txbasshound]
#13222611
07/23/19 01:41 AM
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Joined: Apr 2017
Posts: 12,139
tmd11111
TFF Guru
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TFF Guru
Joined: Apr 2017
Posts: 12,139 |
My tach and speedometer both quit at the same time. 1998 Mariner Magnum EFI 150 1998 Astro. What do the two have in common? Unless you have an electronic speedometer the only thing the two have in common is the circuit for the backlights inside them. If you do have an electronic speedometer then look at the ground circuit.
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Re: Electronics question
[Re: txbasshound]
#13222622
07/23/19 01:51 AM
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Joined: Mar 2003
Posts: 1,349
scruboak
Extreme Angler
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Extreme Angler
Joined: Mar 2003
Posts: 1,349 |
Anything added just before failure
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Re: Electronics question
[Re: txbasshound]
#13222979
07/23/19 02:11 PM
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Joined: May 2013
Posts: 115
illest23
Outdoorsman
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Outdoorsman
Joined: May 2013
Posts: 115 |
You check Voltage regulator for the Tach?
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Re: Electronics question
[Re: tmd11111]
#13223158
07/23/19 04:10 PM
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Joined: Nov 2006
Posts: 45
txbasshound
OP
Outdoorsman
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OP
Outdoorsman
Joined: Nov 2006
Posts: 45 |
I haven't found any wiring issues yet. Still looking lol.
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Re: Electronics question
[Re: scruboak]
#13223169
07/23/19 04:15 PM
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Joined: Nov 2006
Posts: 45
txbasshound
OP
Outdoorsman
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OP
Outdoorsman
Joined: Nov 2006
Posts: 45 |
Nothing was added or rewired. They just both quit. Have looked for blown fuse but haven't found any. I'm sure I will stumble across it eventually but thought maybe I'd be able to find out what they have in common. I assume the tach has a sending unit somewhere on the motor and the speedo probably has a pickup somewhere on the hull but I'm not real sure what I'm looking for. The boat's 21 years old so kind of expect little things to go wrong, just a little freaked that so much is happening all at once.
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Re: Electronics question
[Re: txbasshound]
#13223278
07/23/19 05:28 PM
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Joined: Apr 2004
Posts: 14,061
Stump jumper
TFF Guru
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TFF Guru
Joined: Apr 2004
Posts: 14,061 |
I would bet on coincidence. Can't help with tach. For the speedo look just above the bullet on the lower unit. You will find a little hole. Get a drill of the same size and run it back and worth by hand to start. I had wood packed so hard in mine before that I had to get the drill out and run it real slow. Also look where the plastic tube comes out of the lower there should be a connector. Make sure it has not come loose.
2200 Bay Champ/200 Mercury Optimax
2017 Tundra TSS 4x4 Crewmax 5.7L
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