Battery charging on a model 200 20 HP electric start Mercury

[SCD]

I have a 1977 mercury 200 20HP model motor.
It has an electric start and I'm wondering how it charges the battery.
It doesn't have a rectifier regulator on the motor.
Did this motor ever charge the battery?
Thanks
Steve

 

[racerone]

Yes a charging coil and rectifier was an optional extra.

 

[SCD]

So that means I have to manualy charge the battery after so many starts?

 

[racerone]

Correct and if your motor is in good condition / in a state of tune a good size battery would be good for say a 100 starts.

 

[MH Hawker]

and most of the small hp motors only have a 4 to 6 amp charging system any way, i run a 15 hp and its 4 amp

 

[SCD]

Thank you everyone for your info. The mercury dealer told me if it had electric start it had a charging system. I dissagred with him. He has been in business since the mid 60's.

​Thank you again

Steve

 

[racerone]

No doubt that electric start was added later and not the charging part.--------If it left the factory as an " electric model " it would have the charger.

 

[SCD]

This is the type of ignition coil I have. I see several different types on the internet but they don't look like they will work. (mercury 74367A3) Does anyone have a picture of the one that will fit.

​Thanks
Steve

 

[SCD]

This is the type of ignition coil I have. I see several different types on the internet but they don't look like they will work. (mercury 74367A3) Does anyone have a picture of the one that will fit.

Thanks
Steve

It's been 5 years and still searching for my solution. The reason I want a charging system is I fish at night ( lights )and use a fish finder. These drain the battery.

Questions:

Can I use the ignition stator coil for power to add voltage to a rectifier?

Can I change my ignition stator assembly to one that accepts a lighting coil?

If I could get a picture of an engine's ignition stator with lighting coils, I will know what to look for.


1975 mercury 200 20hp motor
serial #7063077.

 

[SCD]

It's been 5 years and still searching for my solution. The reason I want a charging system is I fish at night ( lights )and use a fish finder. These drain the battery.

Questions:

Can I use the ignition stator coil for power to add voltage to a rectifier?

Can I change my ignition stator assembly to one that accepts a lighting coil?

If I could get a picture of an engine's ignition stator with lighting coils, I will know what to look for.


1975 mercury 200 20hp motor
serial #7063077.

 

[jbcurt00]

@racerone
@SCD
keep it to PMs

 

[stylesabu]

wouldnt it be easier to carry an aux battery? with a 20 hp you should always be able to pull start. i know the extra weight sucks, but i used to fish for a week at a time with 120. only want i broght in 12 volt batters or what a 75 hp motor could charge it was a 1989 so i think i was told 12-15 amps. good luck, i finally bought a bigger boat and motor with a 35 amp output solved the problem

 

[SCD]

thats what i will do thanks for everyones replys
thanks
steve