94 Larson 173, 3.0 Merc lost ignition????

[jmoooz]

Hi all, I have a 97 Larson 173 with a 3.0 Merc I/O. Just this Wednesday I had it out and all was well until I shut off the ignition luckily at the dock. I have power at the gauges but no click or crank. The battery is fine and I can crank it with a direct starter jump but it will not run. I have checked all fuses, changed the key ignition switch and looked at all wires from the cockpit to the starter. I think my next step is to swap the "slave solenoid" next but this is very frustrating... Anyone else have this happen before? What do you advise? Thanks in advance...
John

 

[Dave^5]

check that your shift interrupt switch is working properly assuming you have an alpha drive. if you turn the key on and manually jump the slave solenoid and it fires up then the solenoid is your problem if not then its not

 

[mr jims boat]

I would start with the safety lockout and work back from there. sounds to me its on the control box. a cheap cleaner is aluminum brightner just break the screws lose and spray ir on your conections and after a few minutes your connections will be like new. but be careful is not good on the carpet.

 

[achris]

Power at the gauges but no cranking. Indicates a possible broken wire or the neutral safety switch (inside the control box) is the cause. Especially if you can make it crank by directly powering the solenoid. The shift interrupt switch will only kill spark, not cranking, so we can rule that out. Easiest way to check if it's the neutral switch is to find where the wires that go to that switch are connected to the harness (in behind the gauges). Just join the 2 wires together (don't even need to disconnect them from the control box) and see if that solves the problem. The wires you're looking for are yellow with a red stripe. One will come from the key switch, be joined to a wire that goes to the control box. The other comes from the control box and joins another yellow/red that goes into the harness to the engine.

Chris......