Starter Problems? 99 200hp Optimax

[Drew_8899]

I'm having some issues with my 99 200hp Merc Optimax.

A couple weeks ago, I began to notice that the engine would shut down/stall out while idleing for more than a few minutes. More recently, when starting the engine, the battery/starter sounds very week and it struggles to turn the engine over, but always manages to start. Again, even more recently I am now also having the engine warning light come on when I get around 3-4000 rpms (no horns, just the light). I have had the battery checked and all looks good. I'm guessing that this is probably the starter and/or alternator. Any input guys? Any ideas on what a starter or alternator could cost? Thanks!

-Drew

[EuropeanAM]

Drew:

Would be more than happy to assist.

Let's start with some BASICS:

1. Engine serial number?

2. LOAD TEST the battery- check the connections, ensure they're CLEAN, ENGINE CABLE INSTALLED FIRST, remaining lugs LARGEST TO SMALLEST, and finish off the connection with a STAINLESS LOCKNUT (do NOT use wing-nuts).

3. A computer diagnostic, with PRINTOUTS of the Fault Seconds Counters would also be of benefit.