Tohatsu part identity ?

[k1ngad]

Hi ,can anyone tell me what this part is and how to test it



Its from a Tohatsu M16a2. wording reads "toshiba S5082D 8-H " on the + terminal is a female spade connector and on th - side a male spade connector.It appears to have been added to the ac lighting circuit.

Any help appreciated.

Thanks

 

[Sea Rider]

Re: Tohatsu part identity ?

Have not seen one of those on any 15-18 HP engine, could be a rectifier, diode ? if that part is faulty, write Toshiba Japan and ask them directly, this Company is a well reputed brand for high class electronic parts. Post a much closer same pic ?

Happy Boating

 

[k1ngad]

Re: Tohatsu part identity ?

Yes I will get a better pic tomorrow (hard to get a good pic in the garage tonight) I updated the original post ,it appears to have been added to the ac lighting circuit so I think your on the right track, but I am bemused as to its function (charging I think ,but.......)I have spent ages googling to no avail.
I have recently bought this engine 70,s I believe ...but trying to get any info /manual on it is like trying to find rocking horse ****.
But hey thats life where boating is concerned.

 

[pvanv]

Re: Tohatsu part identity ?

You have a rectifier. AC in, DC out. That allows the lighting kit (alternator) to produce battery charging current. Interesting that it only has 2 terminals. Typical 4-diode bridge rectifier would have 4 terminals (2 in, 2 out). Could be a single diode in there, delivering half-wave rectification. Is the bolt-hole section bare metal on the other side, so as to provide ground, and possibly allow it to be a 2-diode rectifier?

 

[k1ngad]

Re: Tohatsu part identity ?



Ok hopefully a couple of better pics.
But looks as though it is for converting an ac lighting circuit to a charging circuit would anything else be required to do this job ? some form of regulator maybe ?
It is encased in plastic no metal parts for grounding It has been placed between the lighting circuit plug outlet and wiring to fly wheel seeming to loop back.
Thanks for the replies so far they are appreciated.

 

[pvanv]

Re: Tohatsu part identity ?

It's just a diode. That gives you half-wave rectification for charging. I doubt there would be any regulator; seldom used on small-output charging systems.

 

[k1ngad]

Re: Tohatsu part identity ?

A quick update gave the engine a good clean and it fired up second pull, tested the outlet and its showing 8-9 volts at idle which I was quiet impressed at.Now I just have to work out which is + and which is - plug configuration is two female spade connectorsin a block 1 verticle 1 horizontal.

 

[pvanv]

Re: Tohatsu part identity ?

You need at least 14-15 vDC to charge. What kind of meter did you use to take that 8-9 v reading? Was the meter set to DCV? Did you take the reading on the DC side of the rectifier? If so, the block will be ground, and one of the wires from the DC connector will be connected to block ground, while the other will be connected to + DC on the rectifier.

 

[k1ngad]

Re: Tohatsu part identity ?

I used a digital volt meter DC setting ,the reading was taken from the outlet socket , these readings were taken with engine idling , I assume that with the engine under load and and increase in revs that the output will increase ?

 

[pvanv]

Re: Tohatsu part identity ?

Possibly. Still, I would expect well over 13vDC at idle, otherwise, idling would cause your battery to discharge.

 

[k1ngad]

Re: Tohatsu part identity ?

Ah I see,Ill have to run it up again to check.I just need to get a plug for the ac outlet to conect to a battery.
Many thanks for the info.