Hey guys I just bought a throttle trim switch for my zero effort controls on my 87 formula 272 with twins from Great Lakes skipper and im looking for a schematic and I don't have one. I'm not sure if I didn't get them or if my girl threw them out or maybe I did lol but anyways just curious to see if anyone had one.. I would like to install the trim switch to control both outdrives and also keep my independent switches for each drive and I feel if I tap into the switches it will back feed and I will not be able to control each motor independently. Any help would be great!

You will need (4) diodes, install between your single trim switch and your individual trim switches. A diode works like a check valve, the current can go one way but not the other. I believe there is a good diagram on Livorsi's website.

what topgas said...

thanks! im having trouble finding the diagram, you wouldn't happen to have the link would you?

Just looking for that myself. The schematic is on the last page http://www.livorsi.com/pdf/th_series.pdf

mercury sells the twin motor diode assemblies
are color coded and plug and play
I got mine from marine engines .com
need 2 1 up and 1 for down

how many amp diode will I need? im assuming not much since im running to a relay and not the actual motor

is this a clamp on style I been looking for one for a while can u relay the part number thanks

http://www.ebay.com/itm/Baja-Formula...FXdUVC&vxp=mtr

this is the exact one I bought

Thanks looks like it will work for me Thanks again