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Bf75-1101350 coils

P

P.B.

New member
Just aquired this motor & need to know the year. Also it has 2 coils, one has continuously stacked plates, while the other has seperatly stacked plates that feed the points. My question is, i have continuity between the 2 leads even when taken off the motor & unplugged. This doesn't seem to be right. Is it?
 
The motor is a 1979. The model number is BF75Z.

I am not sure what coils that you are referring to, but there are two under the flywheel. One is the primary coil (#3) and the charge coil (#6). Of course the ignition coil is #2. http://www.boats.net/parts/search/Honda/Outboard Engine/0/BF75Z SA/IGNITION COIL FLYWHEEL/parts.html


If you are referring to part #12 http://www.boats.net/parts/search/H...T CARRYING HANDLE COVER LOCK LEVER/parts.html

It is the rectifier.

Your measurements will depend on which one you are measuring.

Mike
 
hondadude said:
The motor is a 1979. The model number is BF75Z.

I am not sure what coils that you are referring to, but there are two under the flywheel. One is the primary coil (#3) and the charge coil (#6). Of course the ignition coil is #2. http://www.boats.net/parts/search/Honda/Outboard Engine/0/BF75Z SA/IGNITION COIL FLYWHEEL/parts.html


If you are referring to part #12 http://www.boats.net/parts/search/H...T CARRYING HANDLE COVER LOCK LEVER/parts.html

It is the rectifier.

Your measurements will depend on which one you are measuring.

Mike
Click to expand...

I'm refering to what I believe to be the priary coil. It's located uder the flywheel & it goes to the ignition coil & the shut down switch
 
Hi,
Welcome to the forum.

Yes, the primary coil MUST have continuity between the two leads and the resistance of the coil should be approximately 2.0 ohms depending on the temperature.

The charge coil should also have continuity between the two leads and the resistance should be approximately 0.13 ohms depending on temperature.

Both coil's wires should have infinite resistance between the lead ends and the stacked iron core.

If yours measure close to these specifications, then you have two good coils.
 
Thank you both for responding. I was attempting to set the point gap with a meter & it made no difference whether they were open or closed, I still had coontinuity between both sides. ???
 
Last edited:
Are you using a digital meter? If it doesn’t have "auto ranging" then you have to select the scale manually. Don't take offense if you know all this already, I just want to make sure we're covering the basics.

Did you disconnect the condenser (capacitor) brfore trying to set the points? It could be shorted and, even if it's not, it will collect amperage from the battery in your meter and skew your results.
 
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