Hello
Hoping for some help. Does anyone have the ignition/starting schimatic for a 2007 or new 496ho/8.1 mercruiser with starter relay, Not A Slave.
Just reinstalled both engines, Starbord engine fires, runs great. Port engine is a no crank. Have check power everywhere, ignition has power at all terminal in run position.
Starter relay has power, can jump relay to engage starter. Relay has 4 wires, red with purple stripe, Yellow with red, Black with yellow and Yellow with black stripe.
Yellow wire with black stripe has no power with key in run postion. Need schimatic to see where this wire goes. Have jumped neutral safety switch, not the issue.
Have checked all connections.
What am I missing?
All help much appreciated!
Dan

see if this helps

Thank you for this, I do have a 14 pin connector, not sure if that makes a difference. Also, what is a MIE transmission switch?

Looks like its a nuetral safety switch in this diagram, also I think that this is a schematic with a slave.
My wiring has nuetral safety switch with a yellow with red trace, also i jumped the nuetral switch, didnt help.
Thank you, I do appreciate the help.
dan

Im not for sure, I picked it off this thread

496 wiring harness to dash

I can find wiring diagrams for everything with a slave selonoid. Why is there no schematic for 2007 and above with a starter relay instead of a slave? Need to know where one wire goes from the relay, yellow with black tracer, on my 8.1 merc.
Very frustrating.
Hope someone has the the schematic to help me.
Dan

I have never seen a mercury engine that did not have a slave but who knows. they did it because they did not know what the engine was going in and did not want the starter wire from the dash to be 40 feet long so they have it run a slave to power the solenoid on the starter itself. the transmission switch shown in the diagram is the neutral switch. do you have transmissions or bravo? if bravo it would use a switch on the shifter and if trans then the one on the trans as shown. not both.

I believe from2007 and up, Mercruiser switched from a slave selonoid to an actual starter relay, that is what I have. No Slave.

all the starters have a solenoid on them the slave just activates it rather than the wire in the harness from the dash. do you have transmissions or bravos? some engines have what looks like a ford solenoid on them rather than a relay but they do the same thing which is supply the starter relay on the starter with a better power supply for the yellow/red wire.

I have bravos.