tearing my hair out- new packs, trigger,stator - STILL intermittent miss. 85 blackmax

**Merc 2.5** · 11-12-2019, 05:36 PM

Have u tried to ohm stator yet or trigger?? Any parts layin round (electrical)

**Fstarockr** · 11-12-2019, 11:48 PM

Originally Posted by Dave S

If you still have it hooked up .... the Idle stableizer/////advance box.

no stabilizer.. Ill dbl check the coil grounds - i got good dva on the terminals and re-screwed each terminal to/from coils/packs to make good connections -

**Fstarockr** · 11-12-2019, 11:51 PM

Originally Posted by Merc 2.5

Have u tried to ohm stator yet or trigger?? Any parts layin round (electrical)

All ohms show fine numbers on stator and trigger - dva also good!! only the packs had a 7000 bias difference - one was in spec @ 14k, the other was 21k! Replaced with a pair from CDI- no change..

The replacement stator was about 1/16th of an inch thicker - could this cause issues? its one of the 3 stators listed for my motor, and theres a picture that says "lamination thickness" - i guess they had various thicknesses.. new stator seems to run wierd.. different sound -

No parts lying around unfortunately -

**tlwjkw** · 11-13-2019, 05:34 AM

run it in tha "dark of night" without tha cowls...………..

**Dave S** · 11-13-2019, 06:50 AM

A different sound.....happened to me once.... the motor had the yellow tag missing on the wires and the stator,coils and trigger were not paired and messed the timeng up. My brother had a bad F/w......drove him crazy.

**Fstarockr** · 11-13-2019, 12:00 PM

Originally Posted by Dave S

A different sound.....happened to me once.... the motor had the yellow tag missing on the wires and the stator,coils and trigger were not paired and messed the timeng up. My brother had a bad F/w......drove him crazy.

Sounds about right! Now where do I find a matching flywheel!

**Fstarockr** · 11-13-2019, 12:03 PM

Anyone in Socal near Long beach have a 200 flywheel I can test with? pm me plz :/

**KIRCHNER** · 11-14-2019, 10:52 AM

Originally Posted by Merc 2.5

Doubt that gives intermittent spark. Either all or none power wise. Just went thru that on another thread

yes indeed, KEY SWITCH.. dont ask...

**KIRCHNER** · 11-14-2019, 10:55 AM

Originally Posted by tlwjkw

run it in tha "dark of night" without tha cowls...………..

solved many electrical ghosts for me.

**Fstarockr** · 11-14-2019, 11:16 AM

i did test with harness disconnected and same symptoms - new plug wires, but for peace of mind ill run her in the dark this evening..

**Merc 2.5** · 11-14-2019, 05:58 PM

Originally Posted by Fstarockr

All ohms show fine numbers on stator and trigger - dva also good!! only the packs had a 7000 bias difference - one was in spec @ 14k, the other was 21k! Replaced with a pair from CDI- no change..

The replacement stator was about 1/16th of an inch thicker - could this cause issues? its one of the 3 stators listed for my motor, and theres a picture that says "lamination thickness" - i guess they had various thicknesses.. new stator seems to run wierd.. different sound -

No parts lying around unfortunately -

Well reason I asked. Is lots times things get tested and "pass" but if u swap part issue goes away. Has happened alot. Not saying its ur prob but nice to have a ex part. I have few parts if u can narrow it down

**Motv18** · 11-15-2019, 12:16 AM

Check voltage to the scr. Since we seam to be giving the switch boxes a pass.

The new parts might not be providing enough voltage to fire the switch and woltage will drop or does it go up on that as rpm increase dropping more cylinders.

The other issue that would happen is weird timing from the capacitor charge rate.

Tracing the voltage on the scr in the box is about as weird as it gets, and normally for a bias or stabilizing check. But it can mess with non stable units with either the scr blown or not enough voltage to trigger the switch. It’s pretty rare

you can also tap the greens to see if voltage is even sent to the coil. I forget the old setting was it dwell time or such, it tested coil charge time and would throw it back to a bad capacitor in the switch box if it was low or something. Don’t see the test much these days.

**Fstarockr** · 11-16-2019, 11:22 AM

motv - all v at coils almost identical to terminals at packs- volts increase steady as rpms increase..

tried it in the dark last night - no sparks. im going to maybe put it on the water and see how the power is