Anyone have the wiring hook up for these? I was unable to complete my install due to confusion, and now that i have one of those nice color, laminated wiring diagrams, I thought I'd try it again.

Basically, you take the small wire off the starter solenoid and use that to turn on a 30amp Bosch relay. Provide the main power to the relay contacts via a 10ga wire that is fused and comes directly from the battery. The other relay contact is then sent to the starter solenoid through another 10ga wire. The other side of the relay coil is grounded. When you turn your switch to start, even a weak signal from that circuit will be enough to fire the relay. When the relay fires, it will all the solenoid to pull all the juice it wants to. This is no where near as much juice as the starter motor itself will be pulling, but more than the old contacts and wires in the start circuit want to give it.

Without the relay, the click-click is typically because the solenoid is getting enough juice to move and try to engage the gear....but not enough to fully engage it. There is a set of contacts in the solenoid that don't engage until the gear is all the way in. These contacts are the ones that let the main power flow to the actual starter motor. That way, the motor is not turning when the gear is trying to engage.

Hope that was long winded enough! :)

isn't this something that people sell on ebay as a kit?

Have an ignition switch that doesn't have worn-out contacts? Good starter? If the starter solenoid is so fickle that it needs all the current a direct 10ga wire provides, that starter isn't long for this world.

On our very-wet vintage raceboats we don't run relays for anything because they have a higher chance of failure at a critical moment. Our starter switches are industrial momentary toggles. "K.I.S.S.". Get too complex and it's just something else to break or vibrate off (with 2000 HP in a 30' wood boat, damn near everything vibrates off).

My starter tho, is a brand new gear reduction, top flite item. Could be my battery, could be a ground or hot lead, butI feel like Ive checked them all ad-nauseum.

I've put one of these in both of my 510's. They both had 3-4v drop across the ignition switch while cranking. After I installed the relay, no problem at all.

It's just an easy mod that takes the current carrying load off of the stock circuit and therefore all of the components in it. This will prevent the burning up the ignition switch I see people mentioning here and there.

There is a pretty good explanation here:
http://www.type2.com/bartnik/relay.htm

I do that on every car I own. People flash their lights at me often because mine are so bright!

I thought I sent photos/diagram of this already to you.
Isnt it on the DVD??????

I feel unaprreciated here!!!!!!!!!!!!!