noticed last season that engine would run fine but had to charge the battery a couple of times toward the end of the season. battery checks out fine, not using lights or anything to drain the battery, and i started testing charging today. on a charged battery, the voltage stayed around 12.7 volts when it was running and did not flutate when i sped the engine up. i anticipated the voltage would increase as the rpms went up so i am wondering if the voltage rectifier/regulator is faulty. i did flip the battery disconnect while it was running for a couple of seconds to see if the engine would die, and it did not sound like it affected it any----but only left it that way for a couple of seconds. i think it is a 1991 mariner sn 07054043 the best i can read it. the first letter could possibly be a c. what i think is the regulator is at the back of the engine mounted in the bottom of the case. it has several wires running out of it and around the side of the engine. they are separated into 2 wiring groups and they have bullet plugs on the end of them. am i correct in thinking that if the stator was defective, when i cut the battery disconnect the engine would have died? thanks for any help offered!
If the regulator/rectifier wasn't fried before you flipped the switch, it probably is now. You must never run the engine with the battery disconnected. If the voltage on the battery did not rise when you reved the engine the charging system is not working. The engine will run however with the battery disconnected since it generates it's own ignition power without a battery.
i did not flip it until after i had determined the rpm of the engine had no effect on the voltage at battery. i flipped it only for a sec to see if engine would die b/c i felt if stator was defective engine would sputter.
is there a way to check it other than measuring the battery voltage while running? and if i need to replace it, i have noticed the replacement parts listed do not look like the one i have installed. it is much more rectangular and has longer leads on it than the almost square ones shown with short leads. do i just splice it in and only use one mounting screw?
the boat is at my lake home. i took a picture of the part and there are at least 5 wires----but could possible be more as the picture might conceal another one or two.
The regulator shown here is the early style the early ones were square with clear potting and the wires came out the front, the replacements look quite alot differant but last much longer.
mariner 60 hp charging problem
Linear Mode
