charge output of 40hp

[callieann]

I have a 1992 40 hp mercury outboard motor. My fishfinder is showing that it is putting out 15.52 volts back to batteries. Is this bad. Should I replace the rectifier?

 

[ronmold]

Re: charge output of 40hp

15 volts is getting fairly high and could damage electronics and battery if it goes any higher. The rectifier only turns AC into DC and does nothing to manage the voltage, that is done by the regulator. Not sure but your motor may have the regulator and rectifier in the same module. The regulator can fry quickly if a battery lead comes loose or gets corroded.

 

[Moody Blue]

Re: charge output of 40hp

Common concern with motors of this size and vintage. Some of these motors had regulators and some did not. Not uncommon for outputs to reach 17V at high rpm's. The battery itself acts as a kind of regulator and keeps the charging system from 'running away'. If yours had a regulator then it is not working and should be fixed.<br /><br />On motors without a regulator, it is a must to use a marine type battery and NOT an automotive battery. The marine batteries will tolerate the high voltage and the auto type will not. Have not heard from anyone that had electronics damaged by overvoltage of this magnitude.

 

[callieann]

Re: charge output of 40hp

Thanks I will check it out and let you know. Go steelers

 

[callieann]

Re: charge output of 40hp

Originally posted by callieann:<br /> Thanks I will check it out and let you know. Go steelers

I was told that the regulator and rectifier are one piece and will cost 140 dollars. At times the voltage stays at 14v then rises to 15.5v after a time. Should I replace it. John {callieann]

 

[Laotzu]

Re: charge output of 40hp

I have a '91 50hp. The prior owner had upgraded the stator with a red stator. This stator puts out 16 amps at both idle and WOT. Well, it burnt my regulator which was not replaced by the owner when he upgraded.<br /><br />I e-mailed Merc tech's and they told me the red stator requires a combo reg/rec like you mentioned. I'd check to see if you have a red stator(under the fly wheel). If so, The combo reg/rec is the way to go.<br /><br />Jerry

 

[Moody Blue]

Re: charge output of 40hp

My book states that all 40hp models prior to 1993 had the 9 amp stator without regulator. The 1993 and up models of the 40-60hp included a voltage regulator. <br /><br />Are you sure you have a regulated system ? Can you describe the regulator/rectifier ? The rectifier should be square and have 3 posts or studs with wires attached. The regulator/rectifier should be a molded plastic case with 4 wires coming out of it.

 

[callieann]

Re: charge output of 40hp

I will check and post back with you. Thanks steelers 21 tenn 14

 

[callieann]

Re: charge output of 40hp

Originally posted by RodC:<br /> My book states that all 40hp models prior to 1993 had the 9 amp stator without regulator. The 1993 and up models of the 40-60hp included a voltage regulator. <br /><br />Are you sure you have a regulated system ? Can you describe the regulator/rectifier ? The rectifier should be square and have 3 posts or studs with wires attached. The regulator/rectifier should be a molded plastic case with 4 wires coming out of it.

 

[callieann]

Re: charge output of 40hp

I will check and post back. Thanks John{callieann]

 

[pmulti]

Re: charge output of 40hp

Ii have a 90 johnson 40 hp j40tlesr anyone know the charging output? I would like to install a VSR switching system.

 

[HAS]

Re: charge output of 40hp

Callieann

check out www.mfgsupply.com , they have a snowmobile voltage
regulator for 12 volt systems with rectifier the part number is
01-090-1 the price $45.99.. I had an over charge problem with
my 1984 50hp and found out about this regulator on this forum,
it works fine ........HAS