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Need info on 40HP OB Mariner

F

fastfreddie1959

New member
"Possible serial # is 40BE 676

"Possible serial # is 40BE 676BS 20273
I don't know the yr, and would like to
know if it keeps the battery's charged while
running?
I know it's has an electric start and pull cord,
and it's a 2 stroke.
Any info would be helpful.
Thank you."
 
"This is a Yamaha built (f

"This is a Yamaha built (for Merc) Mariner.

40BE is the model - 40 horse, "B" model, "E" electric start.

676B is the Yamaha model number of their own model that this is a carbon copy of.

The "S" indicates it's a 15" (short) shaft motor.

The 20273 part should be the production serial but there appears to be a number missing (should be six digits) and I can't quite figure what it should be.

The "B" model electric starts all had serials starting with "1", but the second digit wasn't a "2" - so not exactly sure what you have there.

In any event, that model was only built between 77 and 81, so it's in that age group no matter what the serial actually is, and all of those models were identical "parts wise".

The B's were replaced with the "C" model which was very prolific. This particular model, and the earlier A model were not overly popular and some parts are getting very difficult to find."
 
Thank you Graham.
my friend g

Thank you Graham.
my friend got the correct serial numbers.

676BS 102736.
My next question is how do i keep the battery
charged?
This is my first boat and am new to this.
Thank you for your time.
 
"Your model had a charge coil

"Your model had a charge coil and rectifier (from factory) since it was an electric start.

The rectifier is a small square black box that will have a couple wires going to it from under the flywheel, a black ground wire that goes to the block and a red wire that goes over to the starter (which is also where the "hot" battery lead hooks up).

The charge coil/rectifier on your model puts out about 80 watts (or about 6 1/2 amps) at max rpms. So depending on how you use the motor (trolling it may struggle to put out an amp or two), it's sufficient to keep a good battery "topped up".

But if you plan on using your start battery to run an electric trolling motor all day, best either bring along a paddle or use the rope start
"
 
"Funny that you mention this..

"Funny that you mention this..
But if you plan on using your start battery to run an electric trolling motor all day, best either bring along a paddle or use the rope start..
lol.gif

I have both.
But am only gonna use the electric troll motor
for emergencys.
Thank you for all the info.
It's greatly appreciated.
As you can tell im a newbie boater."
 
"Hey, we all start somewhere -

"Hey, we all start somewhere - by next season YOU will be giving advice
"
 
"Im wheelchair bound.
But im

"Im wheelchair bound.
But im also a puter tech.
You know boat engines and i know puters.
So if you ever need puter support just Email me.
If i cant fix a puter then it aint fixable
lol.gif

Once again i thank you."
 
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