Mariner 1995 40hp Charging problems

Goodmorning

I am having a problem with my 40hp Mariner magnum outboard. I think it is a 1995 model. I took the boat out yesterday and everything ran fine. However when i was doing my fresh water wash, the motor wouldnt start and i noticed i had a flat battery.
I did some research and did the test procedure listed bellow. The rectifier failed this test.


The one fitted is on the bottom right.
I have ordered a new replacement.
However after reading this thread:
http://www.marineengine.com/boat-fo...208-Mariner-charging-query&highlight=charging
I am wondering if the marine battery is something i have to consider. The boat currently has a car battery fitted and looking over the engine and trying to follow the wires i can see no evidence of a regulator.

Should i consider fitting a marine battery before i install the new rectifier? Could the battery be the reason why the rectifier failed? I dont want to install the new rectifier only to break another one.

I would have posted the serial number of the outboard however i am unsure of where it is located. If anyone requires the number then could you please let me know where it is.

Thanks
Martin

Re: Mariner 40hp Charging problems

I use a lawn mower battery on mine with no problems. Be sure your new battery has removable caps so you can add distilled water if needed.

Jeff

Thanks Jeff,
Yes my battery does have filler caps and the acid levels are good
Martin