VSR/ACR and Yam amp output

[Yamadogg]

I am considering installing a VSR or ACR for my Yamaha 50 2 stroke (2004) (50TLRC). In studying this I've been told that this motor (rated at 17 amps ) will only deliver approx. 6 amp.
1. I'm not sure if this is because I'm not running WOT or because of the 10 year age of the motor?
2. I assume that when I read info stating "alternator" , for my motor that would mean the generator ? I've been looking through the pages of the parts lists and no alternator but a whole page for generator.
To improve the amp output to optimum it would be pretty pricy to replace a generator that seems to be working fine.
3. If the efficiency drop is largely due to age, is there a particular generator component that - if replaced would bring the output back up close to "new" ? Is this a feasible project for one with moderate mechanical skills ?
4. I would like to check the amp output myself, but I have only a couple of multimeters. Both are listed as 10 amp max. I am wondering if I can realistically measure the output using one of these as the output ( especially at low RPM) would be within the range ? Any suggestions ?
I also have an inexpensive 100 amp battery load tester that I've been using to check battery condition. It's a Cen-Tech 69888 ( not adjustable ) which says it will check the starting system but I don't think it will help measure 6- 20 amps.

 

[boscoe99]

A 50TLRC does not have a belt driven alternator. It uses what is referred to as a permanent magnet generator. Magnets in the flywheel wiz by a coil and create AC electricity. That electricity is fed to a rectifier/regulator wherein it is converted from high voltage AC to nominally 12 volt DC.

The output of a PMG is based on the strength and number of the magnets, the number of turns in the coil and the speed at which the magnets go wizzing by the coil. The Yamaha system is what it is based on the design of the motor. It started life with an output of 6 amps and should maintain that output throughout its life, as long as the components are in good working order.

Where did you get the information that the electrical system output is rated at 17 amps? According to Yamaha data the output from the system is 6 amps.

Maybe you are thinking of some four stroke Yams that have a generator output of say 20 amps but only maybe 7 or so are available to recharge a battery. The rest of the current is used to operate electrics on the motor.

What is it that you really want to do? By the title of your post are you wanting to have two batteries installed and have them both get recharged via the use of a combiner/ACR/VSR? Best bang for the buck that I know of is a Yandina combiner. It simply connects to both batteries and the common ground between the two batteries. If the motor is running current will be supplied to both batteries. www.yandina.com

 

[99yam40]

the amps will only be up to 6 amps at higher RPM,
and you should be able to read the out put with your meters you have

 

[99yam40]

the amps will only be up to 6 amps at higher RPM,
and you should be able to read the out put with your meters you have
You should make sure to keep the batteries charged up before running on the boat, as the 6 amps will help keep them charged but are not for charging up dead or run down batteries

 

[Yamadogg]

Thanks for the replies. I guess I don't have to worry about old age. Thanks boscoe99 - very informative - where did that spec sheet come from ( Yamaha ??).

I know I saw 17 a somewhere on the net as well as my owner's man. ( I have both paper & pdf ) I really checked it out weeks ago. So I was going to attach a picure of the specs and....... it says 12-6 . So now I don't know where the 17 idea came from and it's obviously bogus.

I was away for a few days ( neglected to take my PC) on a trip to Lake Champlain - had a good few days. Weather held off for us.

 

[Yamadogg]

Thanks for the replies. I guess I don't have to worry about old age. Thanks boscoe99 - very informative - where did that spec sheet come from ( Yamaha ??).

I know I saw 17 a somewhere on the net as well as my owner's man. ( I have both paper & pdf ) I really checked it out weeks ago. So I was going to attach a picure of the specs and....... it says 12-6 . So now I don't know where the 17 idea came from and it's obviously bogus.

I was away for a few days ( neglected to take my PC) on a trip to Lake Champlain - had a good few days. Weather held off for us.

 

[Yamadogg]

Yes, I do want the motor to recharge both batteries. I already bought a ACR so I hope it works. It should at least help the situation. What would really help would be a source of electric at the dock where we stay.