Starting issue

[Scoyager]

Had my first starting issue while fishing yesterday. Turning the key only produced a clinking sound at the solenoid behind the carburetor, I believe I now understand that to be the "slave" solenoid. I was able to jump out the slave solenoid and get the engine running so I could get back to my mooring. This morning I replaced the slave solenoid but still have the same problem. Does the fact that I can jump out the solenoid limit my potential components to check? After reading some of the other starter issue threads, it sounds like it I should be checking for corroded connections next. The engine is a 2000 mercruiser 5.0, any advice would be appreciated.

 

[Bt Doctur]

A quick test is to jump the 2 large lugs to see if the starter solenoid operates.If it does and you still get clicks at the slave using the key,test with a jumper from the battery.
If it now works you have a low voltage/low current coming from the key switch to the slave solenoid.
Plus the new solenoid could be bad.

 

[Scoyager]

What would cause a low voltage from the key switch issue and how would I fix that? Not looking forward to a lot electrical troubleshooting.
Thanks