Honda bf 75 exciter coil

trilight · #1 (**permalink**) 09-09-2011, 12:05 PM

good day all
bf 75 contact breaker motor, no spark. there is constant continuity at the ignition coil post. disconnected breaker wire--still continuity to ground-----disconnected stop switch, still continuity to ground. the black wire and yellow wire to exciter coil show constant continuity to ground when disconnected from all else----- is this O.K.? or my problem? Thanx

boats.net · #2 (**permalink**) 09-10-2011, 10:12 AM

All does have a path to ground.

trilight · #3 (**permalink**) 09-10-2011, 10:34 AM

Good day
I should add that there is no resistance in the exciter coil circuit. It is direct continuity to ground, exactly as if the stop switch is enacted/pushed.

boats.net · #4 (**permalink**) 09-12-2011, 10:19 AM

The manual just says it should have continuity doesn't state values.

trilight · #5 (**permalink**) 09-12-2011, 01:16 PM

Thankyou "moderator" your time and experience is greatly appreciated. My question stems from the fact that there is a constant connection to ground at the pole of the ignition/sparking coil. There are three wires which run to this pole. The points wire, the kill switch wire, and the exciter coil wire. I believe the ignition/spark coil is triggered by the points closing thereby making a connection to ground. The kill switch also functions by closing the circuit to ground. Therefore if the exciter coil is constantly showing a direct circuit to ground without any resistance it seems to negate the function of the breakers and the kill switch. What am I missing here, is there a exciter coil test?
I am definitely a "shade tree" mechanic but am usually succesfull with most of my mechanical ventures which have been numerous over the past 42 years, and I still have some memmory left.-----I think---chuckle, chuckle
-----by the way---- The great thing about Alzheimers is that one has a new girlfriend every night.

hondajohn · #6 (**permalink**) 09-14-2011, 09:06 PM

Are we talking about the exciter coil or the ignition primary coil? It sounds to me like you may have a bad primary coil. I have seen very few if any problems with the exciter coil (under flywheel - one wire).
There might be a primary coil test in the manual, I can take a look if you're interested.
Good luck.

Quote:

Originally Posted by trilight

Thankyou "moderator" your time and experience is greatly appreciated. My question stems from the fact that there is a constant connection to ground at the pole of the ignition/sparking coil. There are three wires which run to this pole. The points wire, the kill switch wire, and the exciter coil wire. I believe the ignition/spark coil is triggered by the points closing thereby making a connection to ground. The kill switch also functions by closing the circuit to ground. Therefore if the exciter coil is constantly showing a direct circuit to ground without any resistance it seems to negate the function of the breakers and the kill switch. What am I missing here, is there a exciter coil test?
I am definitely a "shade tree" mechanic but am usually succesfull with most of my mechanical ventures which have been numerous over the past 42 years, and I still have some memmory left.-----I think---chuckle, chuckle
-----by the way---- The great thing about Alzheimers is that one has a new girlfriend every night.

trilight · #7 (**permalink**) 09-16-2011, 09:21 AM

thanx John
I am talking about the exciter coil, under the flywheel, mine is from a points style ignition and has two wires one black which runs to the ignition coil the other yellow which is used for the oil lamp circuit. Both these wires have a direct connection to ground, no resistance at all., therefore my ignition coil is directly grounded when the black wire is connected to its pole. Is there a test for the exciter coil?