Thought about installing a 12 volt push button ignition starter on my 2007 Aluminum Triton VT-17. I figured it would eliminate the need for an ignition key and be less to keep up with. Anyone ever installed one after market? Some on Amazon are priced as low as $10-$12. 

Not a smart thing to do because you could end up bypassing the neutral safety switch, and that could prove to be dumb move the first time you start it in gear.

 

So, if you do go forward with this plan, be sure you have to neutral safety switch connected so there is no chance of starting in gear.

 

Also, you do realize along with the push button, you will have to install a toggle switch, and probably a double pole double throw.  A lot of engines are shut down by the key placing a ground on the ignition wire when you switch to the off position.  Just turning the 12V off won't do it.  So, you will need to some way to apply that ground the key switch applies if your motor requires that.

 

Hence the reason I inquired with the folks on this board beforehand...

It can be done, if you have much in the way of electrical smarts. 

With a minimum 20-30 amp (ON)(OFF), double pole, double throw toggle switch (not an ON, OFF, ON),  12V will be connected to the center (common) terminal and all the 12V wires the switch turns on will be connect to the normally open side the 12V is connected.  If the motor requires a kill wire, the kill wire will be connected to the other center (common) terminal on the toggle switch, and a ground wire will be connected to the normally closed terminal on the same side as the kill wire.  That way, when the switch is flipped to the on position, it turns on all the stuff the key switch did, and removes the ground from the kill wire.  When the key is switched to the off position, it disconnects all the 12V stuff and places a ground on the kill wire to shut the engine down. 

You will probably have to make a 12ga jumper wire with eyelets on both ends (assuming you key switch has eyelets) and use a small screw and nut to connect all those wires (probably too much to fit on toggle switch) with the other end connection to toggle switch.  You will need to move the switched and the accessory wires and put them together, you just won't be able to use the accessories, if you have any connected without everything being on, unless you want to add another or different type toggle switch.  DO NOT cut terminals off and try splicing wires, you will create one major headache down the road.

When all done, make sure you didn't do something to bypass the neutral safety.  If you just remove the wires from the switch and jumper them to the toggle switch, you shouldn't have a problem