Re: 1974 Mercury 850 serial#4123383 / bad stator
87's are 20Khz bandwidth, still should see that stator's AC....bizarre.
Put the meter on DC, turn the flywheel by hand slowly, watch the analog scale, see any quickie pulses?
Same on AC turning by hand, any pulses?
And can you double check the resistance spec? Looking at mine (not the same but should be close for all intense purposes) it should be lots lower, like "generally less than 1Ω"
Your book says it should be 75Ω? The battery charging circuit winding?