J/30 Class Association Forums J/30 Forum The Boat, Sails and Equipment 2GM Motor Fuse

A different scenario on Rhapsody. There is a 30 amp inline fuse going to the DC power panel that was installed directly behind the battery disconnect switch. This is in addition to the fuse Vic describes which is shown on last page of the Yanmar Operation Manual. The fuse for the Yanmar is only for the starting solenoid, idiot lights and alarm. DC power for the starter is connected directly from the battery switch with the heavy gauge battery cable.

I was delivering the boat to be hauled for the season a couple years back and found that nothing worked electrically, except for the engine panel. It turns out that the hidden fuse socket behind the battery disconnect switch that feeds the DC power panel had corroded terminals causing a high resistance connection. The high resistance connection heated up and melted the insulation on the wire by the fuse socket. So I recommend that people check to see if you have an inline fuse similar to what Rhapsody has. I've replaced it with a spray tight inline socket, and sprayed WD40 on the terminals before installing the fuse. Moral of the story - look to see if you have a hidden fuse like this before it causes a problem.

By the way - I uploaded all the Yanmar reference material to the J/30 Class website. Go to the J/30 home page, then from the top menu mouse over "Info", "Articles of Interest", and click on "Diesel Engine Maintenance"