88HP cranks but does not start - low voltage output from Stator

[shippro]

My 1990 Evinrude 88HP SPL cranks but it doesn't start. I checked spark with spark plug. I don't get any sparks from any cylinders.
I disconnected stop circuit and cranked engine but no sparks either.
I checked stator (Charge coil) voltage with starter cranking. It gets 80~90V but service manual notes that it should be 150V at least. Starter cranking RPM is around 1000 according to tachometer. I checked resistance for the stator but it gets normal reading which is just about 560 ohms.
I checked sensor coil voltage with cranking as well but it gets 0.1V which is still lower than normal value (0.3V). Resistance of sensor coil is fine which is 40 ohm.
I found that rectifier doesn't give resistance with yellow wire. I don't know if bad rectifier can make starting problem.
This starting problem began after suddern shutting off during 30 min. high RPM (over 4000) running. The engine stopped suddernly and never start again.
Please help me if you used to have this kind of issue before.

 

[emdsapmgr]

Re: 88HP cranks but does not start - low voltage output from Stator

The engine has to crank between 225 and 250 rpm's in order to fire the ignition. I'd be suprised that the starter will crank it 1000 rpm's... You can perform a test to eliminate the control box wiring and key switch as a problem. Disconnect the red plug at the engine. Then jump the starter. Check for spark. If you have spark, you know it's in the control box/wiring. If still no spark, it's probably in one of the ignition components. The service manual voltage specs are to be measured with a special "peak-reading" voltmeter. Were you using one of those special meters while you took your readings? Most household voltmeters won't read the engine voltages correctly. Unlikely it's a coil (not likely all 4 quit at once), so you are down to the stator, timer base of the power pack. The rectifier is not part of the ignition system, so look elsewhere for the problem.