Tohatsu Model M20A Electrics

[richardt]

I am trying to find some tech specs on the polarised outlet on an early model Tohatsu model M20A serial number 26768. The info sought is what voltage and current is available at the outlet and what size battery will it comfortably charge. It is not electric start. Thanks,

 

[Silvertip]

Re: Tohatsu Model M20A Electrics

The size of the battery used is a non-issue in a charging system. The only factor associated with it is how long it takes to charge. A very large capacity battery will take longer to charge than a smaller one. If the outlet you are talking about is a charging connection, you should see about 13 to a maximum of 15 volts at wide open throttle. I would guess the charging system output is about 5 amps or so. If your boat electrics draw 5 amps total and you fished for an hour, you would need to run wide open for an hour to charge the battery.

 

[Silvertip]

Re: Tohatsu Model M20A Electrics

The size of the battery used is a non-issue in a charging system. The only factor associated with it is how long it takes to charge. A very large capacity battery will take longer to charge than a smaller one. If the outlet you are talking about is a charging connection, you should see about 13 to a maximum of 15 volts at wide open throttle. I would guess the charging system output is about 5 amps or so. If your boat electrics draw 5 amps total and you fished for an hour, you would need to run wide open for an hour to charge the battery. Think of the battery as a small bucket of water. If the bucket was full and over an hour you used a quart of water for whatever reason, you need to replace a quart when you get back to the dock. Likewise if the bucket was a very large one, you still only need to replace a quart. Large battery capacity allows you run longer between charges but it takes longer to charge them.

 

[richardt]

Re: Tohatsu Model M20A Electrics

Originally posted by Upinsmoke:<br /> The size of the battery used is a non-issue in a charging system. The only factor associated with it is how long it takes to charge. A very large capacity battery will take longer to charge than a smaller one. If the outlet you are talking about is a charging connection, you should see about 13 to a maximum of 15 volts at wide open throttle. I would guess the charging system output is about 5 amps or so. If your boat electrics draw 5 amps total and you fished for an hour, you would need to run wide open for an hour to charge the battery.

 

[richardt]

Re: Tohatsu Model M20A Electrics

Originally posted by Upinsmoke:<br /> The size of the battery used is a non-issue in a charging system. The only factor associated with it is how long it takes to charge. A very large capacity battery will take longer to charge than a smaller one. If the outlet you are talking about is a charging connection, you should see about 13 to a maximum of 15 volts at wide open throttle. I would guess the charging system output is about 5 amps or so. If your boat electrics draw 5 amps total and you fished for an hour, you would need to run wide open for an hour to charge the battery.

 

[richardt]

Re: Tohatsu Model M20A Electrics

Originally posted by richardt:<br /> I am trying to find some tech specs on the polarised outlet on an early model Tohatsu model M20A serial number 26768. The info sought is what voltage and current is available at the outlet and what size battery will it comfortably charge. It is not electric start. Thanks,

Thank for quick response, however I am trying to ascertain the actual output of outlet as I don't have the operators book. I think it is 12v and I would like to use it to charge a battery to operate basic navigation lights.<br />Thanks again upinsmoke.

 

[Silvertip]

Re: Tohatsu Model M20A Electrics

You can check output voltage with an inexpensive volt meter. If it is a charging connection I would bet its 12V.

 

[JB]

Re: Tohatsu Model M20A Electrics

What part of (not engine topics) did you miss, Richard?<br /><br />Moving this to Tohatsu Troubles.