fxsales
New Member
- Mar 26, 2009
- 159
- Boat Info
- 1990 Laguna Cuddy
Twin 1997 Mariner 135's
- Engines
- 1997 twin Mariner 135's
Good Morning,
As I wade through all of the little nit-picky issues of getting my old Searay in tip top shape this is one I cannot troubleshoot. She has upper and lower helms. All instruments in the lower helm work as they should, but there is no synchronizer gauge.
The upper helm instruments look like they were replaced at some time over the last 33 years with a complete instrument panel (Quicksilver). The port engine tach does not function. With it not functioning the sync guage is always pegged to the starboard side. After many hours laying on my back and wading through the rat's nest of wiring under the upper helm, I cannot figure out the engineering of the wiring.
I would think, if the synch gauge is directly relational to the tachs or vice versa that there would be wiring running from one to the other, or vice versa. The sync guage has a three socket wiring harness which I assume is a port/starboard and ground. Strange thing is that harness goes only to what I think is the engine failure buzzer (little black hockey puck looking thing.)
Both tachs look to be wired indentically with what looks like a gound, and power wire. I cannot find any direct wiring from the tackh to the sync guage, yet the starboard tach works fine.
I ran this by the "table of knowledge" at my club, with no direct usable information.
One thing I notice is that when the is no power to the tachs (upper and lower) they hover around 750 rpm. When the key is on the go to "0" until the engines crank. The upper port tach is always at "0" regardless of the situation.
Next step is to pay someone to fix it, as I never drive from the lower helm.
Any suggestions? FWIW it's a '76 SRV300 with 7.4 Crusaders, put in in 1989....So no real documentation.
Thanks in advance
John
As I wade through all of the little nit-picky issues of getting my old Searay in tip top shape this is one I cannot troubleshoot. She has upper and lower helms. All instruments in the lower helm work as they should, but there is no synchronizer gauge.
The upper helm instruments look like they were replaced at some time over the last 33 years with a complete instrument panel (Quicksilver). The port engine tach does not function. With it not functioning the sync guage is always pegged to the starboard side. After many hours laying on my back and wading through the rat's nest of wiring under the upper helm, I cannot figure out the engineering of the wiring.
I would think, if the synch gauge is directly relational to the tachs or vice versa that there would be wiring running from one to the other, or vice versa. The sync guage has a three socket wiring harness which I assume is a port/starboard and ground. Strange thing is that harness goes only to what I think is the engine failure buzzer (little black hockey puck looking thing.)
Both tachs look to be wired indentically with what looks like a gound, and power wire. I cannot find any direct wiring from the tackh to the sync guage, yet the starboard tach works fine.
I ran this by the "table of knowledge" at my club, with no direct usable information.
One thing I notice is that when the is no power to the tachs (upper and lower) they hover around 750 rpm. When the key is on the go to "0" until the engines crank. The upper port tach is always at "0" regardless of the situation.
Next step is to pay someone to fix it, as I never drive from the lower helm.
Any suggestions? FWIW it's a '76 SRV300 with 7.4 Crusaders, put in in 1989....So no real documentation.
Thanks in advance
John
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