88 Johnson 150 all new charging parts still not charging

[71Windsor]

I've been fighting this demon for a while now I've replaced the r/r the timer base and stator along with 2 brand new batteries
Yet it still doesn't charge at all. While running wot I only have 11.9-12.3 what's left? I tested continuity across the wires and they all have continuity I was considering a new wire harness because mine does have a few brittle places that I have cleaned up and soldered to ensure good continuity. Other then that I'm at a loss. The only other peice of the puzzle is the fly wheel but the magnets are all there. And they are indeed magnetic sucks that flywheel right back down when I go to lift it off.

 

[emdsapmgr]

You've not indicated that you've replaced the combination rectifier/regulator. A likely culprit. The basic 150 engines use current part number 585195. You've not stated which 150 you have. If you have the 150GT with the vented flywheel, the rectifier/regulator is the 35 amp version, current part # 395204. This device sends the charge to the battery and sends a signal to the control box to drive the dash tach. Usually when this device quits working, the tach will usually not function properly, or won't work at all.

 

[racerone]

It say that he replaced the ---r/r---in post # 1 and I assume that is the rectifier / regulator.

 

[joetheis]

Is the reading AT the gauges? (my buddy pulled his hair out with a low charging rate,and replace just about everything on his Honda 90, turned out the gauge was reading low)!
Try a multi meter on the battery.
With it shut off take a reading, fire it up and rev.
Does it go up?
If it goes up at all then you can just about rule out a bad wire.
I've found with my limited time with things that spend time on the water, connections corrode and do stupid stuff.
Grounds fall off.
I'd clean/inspect ALL my connections, put electrical grease on them, when in doubt, change it!
I have a auto tester for charging systems that I clip on and it narrows the problems down.
Joe
Remember to take any advice I give with a can of beer er 2!

 

[emdsapmgr]

Missed that he had replaced the rectifier regulator. Hopefully with the correct one for his engine based on the model number..