Evinrude 70 Tilt/Trim question

[DeepTrouble]

I have a 1985ish evinrude and was wondering about the trim. The previous owner had installed some refurbished hydraulics that are working great (knock on wood). The only problem is the tilt is controlled with 2 wires that i need to touch to the battery terminals to work. I definitely want to install a switch, and there are some inexpensive ones on amazon that seem to be a good match. Question is, Is this what i need?

http://www.amazon.com/T-H-Marine-Transom-Trim-Switch/dp/B0000AXW5D/ref=sr_1_1?ie=UTF8&qid=1314847177&sr=8-1

[pete]

pretty sure that should work

[DeepTrouble]

Do i need a selinoid for this? What is a solenoid anyways, lol

[Circle Hooked]

That should work,i think it's for a jack plate but who cares,the price is right.

[pete]

A solenoid[nb 1] is a coil wound into a tightly packed helix. In physics, the term solenoid refers to a long, thin loop of wire, often wrapped around a metallic core, which produces a magnetic field when an electric current is passed through it. Solenoids are important because they can create controlled magnetic fields and can be used as electromagnets. The term solenoid refers specifically to a magnet designed to produce a uniform magnetic field in a volume of space (where some experiment might be carried out).

In engineering, the term solenoid may also refer to a variety of transducer devices that convert energy into linear motion. The term is also often used to refer to a solenoid valve, which is an integrated device containing an electromechanical solenoid which actuates either a pneumatic or hydraulic valve, or a solenoid switch, which is a specific type of relay that internally uses an electromechanical solenoid to operate an electrical switch; for example, an automobile starter solenoid, or a linear solenoid, which is an electromechanical solenoid.

gotta love the internet

[Circle Hooked]

A solenoid[nb 1] is a coil wound into a tightly packed helix. In physics, the term solenoid refers to a long, thin loop of wire, often wrapped around a metallic core, which produces a magnetic field when an electric current is passed through it. Solenoids are important because they can create controlled magnetic fields and can be used as electromagnets. The term solenoid refers specifically to a magnet designed to produce a uniform magnetic field in a volume of space (where some experiment might be carried out).

In engineering, the term solenoid may also refer to a variety of transducer devices that convert energy into linear motion. The term is also often used to refer to a solenoid valve, which is an integrated device containing an electromechanical solenoid which actuates either a pneumatic or hydraulic valve, or a solenoid switch, which is a specific type of relay that internally uses an electromechanical solenoid to operate an electrical switch; for example, an automobile starter solenoid, or a linear solenoid, which is an electromechanical solenoid.

gotta love the internet

Pete that's funny,i think i was on the same page as you

[pete]

ask a question....get an answer!!great minds think alike!

[Circle Hooked]

Yes they do  

[Capt. Bob]

Do i need a selinoid for this?

Without trying to sound like I actually know something ...
Your question should have been, "Do I need a relay"?

Without seeing the size and the starting point of the two wires you are touching to the battery, I can't say you already have one.

A relay is really just a switch that is activated by a load(think current/amp) that is smaller than the load needed to activate the device(trim/tilt) itself. Since the t/t is hydraulically driven, it requires a higher amount of current (amperage) in order to perform its duty. The switch you link to appears to be underrated to be wired directly to the hydraulic pump through the battery. The wires and/ or switch contacts themselves would overheat. A relay allows the use of that same switch by carrying the needed current for t/t operation and at the same time can be opened and closed at a much lower current rate. That allows the switch that you use to trigger the relay to have smaller contacts and wire gauge. So if you already have a relay in place (probably do) that switch should work just fine.

For now, one would have to assume the wires you touch to the battery are coming from the relay but then again,
You know about assuming.

Post a pic and
Good luck.

[Boatdood]

What you've described, sort of, is a two wire system which requires two relays working in conjunction to reverse the polarity going to the wires which in turns reverses the direction of the motor causing the tilt/trim system to either raise or lower. These relays were mounted in a junction box mounted sometimes in the boat but more recently on the engine. If you are taking the wires coming directly from the trim motor and touching them directly to a battery you may be bypassing the relays and that is fine but it doesn't tell if there are any relays on the engine, or in the boat. You are manually doing what the relays would do. The switch you are looking at will work but it needs the relays to reverse polarity.