What Amperage Fuse For Starter Post

[mwnitz]

I've got a 2006 Mercury 3.0L Sterndrive. Like an genius I inadvertently crossed the positive and negative cables... first time in 10+ years. Anyway, I blew the square "lawyer fuse" as I've heard it called. It connects to the electrical post on the starter solenoid. I can't find the amperage anywhere on this thing, even after complete disassembly. Anyone have any idea how to determine the correct amperage for it? I do know there are more than one possible amperage for it. The S/N to my engine is OW330527, manufactured in March of 2005. Thanks!

 

[Bt Doctur]

Its rated at 90A , overkill . I use a 60Amp Maxi Fuse in place of it.While your there remove the Red wire from the lawer fuse and connect it directly to the main post. You dont need a 90A then a 50A circuirt breaker in series to protect the engine and boat wiring
You may also have blown the diodes in the alt so check it too

 

[enginesilo]

I blew mine a few weekends back, I went with the Mercruiser 90A and it cost me around $25. I knew a cheaper option existed but I had a ton of work to do so it was an easy way to get back on track.

 

[Bt Doctur]

When you have to maybe take off an exaust manifold to change that darn thing ,a Maxi -Fuse is a whole lot easier