1969 65HP Mercury outboard magneto Q

[Cuxy]

i have here a magneto and wondering if any one has a schematic for this type engine .. i need to know if this is a ground or a hot !!
that my red lead points to ?

 

[Scaaty]

Re: 1969 65HP Mercury outboard magneto Q

If its insulated going through the body, I'd say its hot..

 

[emckelvy]

Re: 1969 65HP Mercury outboard magneto Q

That side terminal is "hot" in the sense that grounding it kills the spark. If the screw is not properly insulated from the case, you won't get any spark.

Your motor, unless someone has completely changed out the ign, is older than '69. '69 650's had an electronic ign system (Lightning Energizer).

Not that there's anything wrong with a properly serviced magneto!

HTH.........ed

 

[Cuxy]

Re: 1969 65HP Mercury outboard magneto Q

That side terminal is "hot" in the sense that grounding it kills the spark. If the screw is not properly insulated from the case, you won't get any spark.

Your motor, unless someone has completely changed out the ign, is older than '69. '69 650's had an electronic ign system (Lightning Energizer).

Not that there's anything wrong with a properly serviced magneto!

HTH.........ed

thank you,

so ure saying that this should be a ground ??

the paper work on the boat shows it to be a 1969 boat so i assudmed the same w/the motor .. but could be wrong

i have added a few more pics for further info if u have it pls let me know what im looking at ...

 

[Cuxy]

Re: 1969 65HP Mercury outboard magneto Q

engine # is 1847537

 

[Laddies]

Re: 1969 65HP Mercury outboard magneto Q

1965

 

[Cuxy]

Re: 1969 65HP Mercury outboard magneto Q

1965

do share how u know pls?

 

[Laddies]

Re: 1969 65HP Mercury outboard magneto Q

Sorry but I don't understand

 

[Cuxy]

Re: 1969 65HP Mercury outboard magneto Q

Sorry but I don't understand

how do u know its a 1965 engine ?

 

[Laddies]

Re: 1969 65HP Mercury outboard magneto Q

By the gold trim on the face plate and then checking in my Mercury service info.

 

[Cuxy]

Re: 1969 65HP Mercury outboard magneto Q

By the gold trim on the face plate and then checking in my Mercury service info.

well thank you then ....

think i can get a schematic for this engine ign sys .. from you ...

 

[Laddies]

Re: 1969 65HP Mercury outboard magneto Q

 

[Cuxy]

Re: 1969 65HP Mercury outboard magneto Q


thank you very very much !!

 

[Cuxy]

Re: 1969 65HP Mercury outboard magneto Q

hello again

i have further Q on this ign. sys.

at the rectiophere(sp?) it should be +12V when flywheel spins ?

if my starter spins and engages then then the rectiophier and solenoid are ok ?

how can i check the out put of the magneto ?

 

[Laddies]

Re: 1969 65HP Mercury outboard magneto Q

As long as the start turns the engine over the soliniod is good, the finned rectifier should have an 11 to 1 advantage then tested with a ohmmeter and the stator should test good for continuity. The easiest way is stat the engine with a voltmeter on the battery an see if the thing is charging. We test the mags by puting the on a sun machine that spind then from 0 to 8000 RPM and test each wire for output with a spark gap set at 7/16", mort don't have a sun machine and use 4 sparkplugs with the ground electriod cut off. All most anything will work just as long as the gap and spark are equal

 

[Cuxy]

Re: 1969 65HP Mercury outboard magneto Q

As long as the start turns the engine over the soliniod is good, the finned rectifier should have an 11 to 1 advantage then tested with a ohmmeter and the stator should test good for continuity. The easiest way is stat the engine with a voltmeter on the battery an see if the thing is charging. We test the mags by puting the on a sun machine that spind then from 0 to 8000 RPM and test each wire for output with a spark gap set at 7/16", mort don't have a sun machine and use 4 sparkplugs with the ground electriod cut off. All most anything will work just as long as the gap and spark are equal

stator should test good for continuity

when testing this should i be testing on the coil face and they all beep when i place on lead on one and another on the rest ..

 

[Laddies]

Re: 1969 65HP Mercury outboard magneto Q

Yes

 

[Cuxy]

Re: 1969 65HP Mercury outboard magneto Q

Yes

i tested from each coil to the ends attached to the rectifier and they are ok

 

[Cuxy]

Re: 1969 65HP Mercury outboard magneto Q

ok i tested the battery when i trun the egn on ..

and the battry level goes from 13V to 11V

... should the spark plugs be wet with gas ?

 

[Cuxy]

Re: 1969 65HP Mercury outboard magneto Q

As long as the start turns the engine over the soliniod is good, the finned rectifier should have an 11 to 1 advantage then tested with a ohmmeter and the stator should test good for continuity. The easiest way is stat the engine with a voltmeter on the battery an see if the thing is charging. We test the mags by puting the on a sun machine that spind then from 0 to 8000 RPM and test each wire for output with a spark gap set at 7/16", mort don't have a sun machine and use 4 sparkplugs with the ground electriod cut off. All most anything will work just as long as the gap and spark are equal

spark plug are set to .025