110 Johnson overCharging and power loss

MAW31

Petty Officer 1st Class
Joined
Aug 15, 2009
Messages
217
1995 110 johnson.

Stator had visible signs of rust between the ring layers and cracks in the plastic. I replaced the stator.

What used to be a 13 volt charge is now a 16 (sometimes 17) volt charge.

I do have 2 batteries on a switch both batteries 6 months old.

Part of the reason for the stator change was due to a significant power loss that occured the day before while out on a sunset run.

while at 3/4 throttle and good power, motor just dropped 2000RPM instantly, and has been sluggish ever since.

went out this morning, motor wont go past 4k, and is slow to get there. alot of motor headshake from idle through WOT.

rechecked timing. at idle: 4 degreees BTDC, reeves static test shows exactly 24BTDC. perfect.

I'm wondering now that i have a good stator and its making more voltage, might there be a correlation between the high voltage draw, and my overall loss of power? Does this sound like a poor ground issue?

today:

i checked the timer base resistances. white to others. all at 42ohms. at the edge of margin but within tolerance. (it is truly the only element on this motor i have not changed.)

swapped power packs. no change.

tested compression. all within acceptable range.

consistant and strong spark on all 4 plugs. (timing light / 7/16 gap test)

took carbs off, disassembled (again), used acetelyn tip cleaner rods to check all passages, checked floats, reassembled. nothing surprising there.

I am simply scratching my head on this one.
Dont really know where to turn besides replace the timer-base.

did i miss something to check?

thanks
 

emdsapmgr

Supreme Mariner
Joined
Dec 9, 2005
Messages
11,551
Re: 110 Johnson overCharging and power loss

You might want to post the model number of the engine. I don't see a 110 hp engine in the 1995 parts list. When you replaced the stator, was it's voltage output low? What is voltage the output of the current stator. Should be minimim 150 volts, as measured with a peak-reading voltmeter. On the models which have a rectifier only, it is not unusual for battery voltages to creep up to over 16 volts. Those models which have a combination rectifier/regulator, it is unusual to see voltages much over 13.5 volts.
 
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