[williambruss112]

So, I ASSUME this means that the stator is putting out voltage to the regulator, but the regulator is not turning the voltage to dc and sending it back to the battery? Next thing I did was check A/C voltage across the yellow and yellow/grey wire and found around 24v A/C at idle and around 70v A/C at around 2500 RPMS. I again assume this means the stator is working correctly? Is there a "correct" way to test stator output and is there a spec for that test? here

[Macho]

I have a 1991 Evinrude/Johnson 90 HP that does not charge while running. Luckily, I have two batteries in the boat and was able to use the trolling motor to get me back. Partially charged the battery. Voltage now is 12.3 engine not running and the voltage drops slowly while the engine is running. here is a link a diagram. I don't have a tach, so checking tach is a no go. This diagram say's it's for a 1986, but it is identical to my 1991. I de-coded my model # and it is diffidently a 91. http://www.maxrules.com/graphics/omc/wiring/1986_90_115.jpg

[Albert Novel]

I assume that if I unhook the battery and the engine stays running that this must mean the stator is good? I didn't see this on a flow chart, but if the stator is producing enough energy to provide spark to the coils/plugs then it must be working correct??

[ralphmcclure]

Next thing I did was put my multimeter on DC volts and checked from the yellow/grey wire to ground and found 6.5 volts DC at roughly 1500 rpm. I then checked the yellow wire to ground and found around 6 volts on the yellow wire. I then checked for voltage on the red wire leaving the regulator and found zero volts.
(I confirmed zero volts on the red wire leaving the regulator by checking pin #4 on the terminal block to ground and found zero volts. I later checked resistance from terminal #4 to the red wire on the voltage regulator and found 1 ohm of resistance.)

[bitcoin]

Is this a common failure part? Is there a place to get this for less than the $79-80 that boats dot net sells it for?

[Kelaos]

T he first area we will approach is the ignition system. OMC used a "Universal" magneto on most all small outboards from the early 50's right on up to just a few years ago. Over time the components on the earlier models will deteriorate requiring replacement. Fortunately these components are very inexpensive. [links]

[Maxalu]

Contact
the Mastertech!

[cheapvps]

To set the points, move the cam until the point arm follower is touching the cam at the "TOP" embossed thereon. Set them at .020 with a feeler gauge cleaned of all oil with denatured alcohol, acetone or lacquer thinner. The feeler gauge should slip out from between the point faces with a light resistance and the arm should not appear to move when the gauge is removed. Care taken to set the points exactly the same will result in a strong spark and a smooth running engine. [links]

[painge]

M ost of the small pictures are active links to full size photos to help you along. Just click to look, they will open in a new browser window. Feel free to print out any of this info FOR YOUR OWN USE ONLY!! here

[Guybrush01]

We pay the freight out in USA on all orders over $100.00. Orders less than this amount will have a shipping and handling charge of $8.75 added. Some bulky and heavy items will incur additional charges. You will be notified beforehand if this is the case. All orders normally ship via USPS. Remember, all orders receive free technical support from the MasterTech!

[kslaughter]

Re: 1986 70 hp Johnson no spark

[ConfusedEnthusiast]

In your case, swap the coils (top and center) and see if the no-spark follows it. If it runs fine after the swap you may have had the ground problem. if not replace the coils. [links]

[mrchantcashadvance]

This just a thought; My friend has a 77 70HP Johnny which was difficult to star tand would take many tries to start before it did(maybe) until his starter finally quit. We took it off and he carried it to repair shop who put new brushes in and generaly cleaned it up and greased it. Put it back on motor and when he hit the starter the thing started immediately; turned out the starter was not spinning the engine fast enough to generate a strong enough spark to fire. Has not failed him since. Just a thought.This something Joe Reeves and F_R preaches.

[sbrendanwalkerz]

When your outboard motor refuses to start, remember that with gasoline engines, more problems are caused by the electrical and electronics systems than by the fuel or fuel distribution systems. Once you eliminate the possibility of a dead battery, broken wires or bad spark plugs, look at the stator, located on top of the block where the condensers and points are found. While some tests require the expensive equipment found only at the dealership, testing the stator requires only a $15 meter found at most hardware stores.

[jgarzik]

Turn the selector on your multimeter to the "Ohms" setting. The volts range is marked with the capital letter "V," the amps range is marked with a capital "A." The ohms range is marked with the Greek letter omega, shaped somewhat like an upside-down "U." [links]

[Comatus]

Look up the range of resistance for your stator in your motor operator's manual.