Question about Electrical Supplies

1 Answer

I put my wolf 800 generator away working and it now runs ok but will not generate. I have tested the 4 leads at the plug and there are no breaks. The reset switch is ok. could it be the sealed black box that i can't test?

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 3,740 Answers

Hi and welcome to FixYa, I am Kelly.
Test the capacitor. This is an inverter type generator and the armature / rotor is an induction field with a varistor across the armature. They work via magnetics generated by the rotor. That initial AC voltage goes thorough a capacitor and diode to make DC to increase the field strength to reach the final output voltage.

The capacitor needs to be checked (usually has yellow wires) as does the diode pack. Flashing the field in an inverter type generator is usually NOT successful as there are no brushes to the armature / rotor. Isolate the capacitor by removing ONE set of leads off of ONE side. Then set your meter to R x 10K and probe the terminals. You should see a momentary jump and then it goes toward infinity. Reversing the leads each time you probe the capacitor should yield the same jump and drift toward infinity. No Jump = bad cap.

Also look for a micro- circuit breaker in the control panel area. If your unit has the micro breaker you will usually see a tiny orange plunger sticking out about 1/8" Press it back in and test the unit. If it stays reset great. If it pops right away.. there is a short in the capacitor or to and or from the capacitor.

The diode pack can have 3 or 4 wires on it. One wire being common to all of the other wires with meter leads in one polarity. Reversing the test leads across the diode it will read open.

The wires from the capacitor when removed should read resistance to each other. NO resistance - bad stator or broken wires! :( The yellow wires / 2 capacitor wires usually have some male / female round plug in connections. Make sure the connections do not appear that they have been HOT. If you note the connections have been hot try cleaning the terminals first. Most of the time the only option is to cut out the connector and splice the wires.

IF the stator winding checks out good as does the capacitor and doide pack the most probable suspect will be the varistor of the armature / rotor. (
Thanks for choosing FixYa,

Posted on Apr 08, 2011

  • zorki Jun 03, 2011

    It would be nice if a schematic was available1
    Otherwise good advice



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Pm0645250 just stopped generating power. Motor runs fine .

You need to run tests on your alternator. We have made some videos to show you how to do this on our website. It is very easy!


The Generator Guru Team
World Leading Supplier of Parts and Spares for Portable Generators

Mar 08, 2017 | Electrical Supplies

1 Answer

Wolf. Why doesn't it stop running?

The on-off switch may be functioning mechanically but not electrically. A continuity test while operating it can confirm the malfunction.

Feb 19, 2016 | Electrical Supplies

2 Answers

How to test the electrical system of the generator for free

Ez test to determine if stator wiring is ok. This test works on generators that have two sets of 115v plugs and 220v plug. Use a 12v, 1amp ac power supply ( smaller ac power supply should work ok ). With generator not running, apply 12v to one of the 115v outlet plugs. Now verify 12v output voltage with meter at another 115v outlet on generator. Also verify that there is about twice the voltage at the 220 v outlet plug (should be about 20v - 24v) . If the adjoining 115 v outlet plug has no output or very little voltage or if the 220 volt plug has no output, most likely stator is damaged or breaker is off. If the stator is shorted voltage reading will be very low and power supply will heat up. If stator is open, there will be no voltage at second 115v plug or 220 v plug. If voltage is ok at the other outlet plugs as per test above then most likely problem is with voltage regulator, or brushes not making contact or armature winding open or just needs to be energized. Unplug the 12v power supply after test to prevent it from overheating. Most generators have two 115v windings that together power the 220v plug. When you energize one of the windings with the 12v power supply, the second 115v winding will be energized also and give you a voltage reading about equal to 12v. You will not damage the generator with this small voltage being input thru the plug. Good luck

Oct 14, 2014 | Electrical Supplies

1 Answer

Hi we have a wolf 950 generator that wont start,cleaned plug,is there anything else i can try,HELP!

are you getting spark. pull out your plug and with the wire connected. hold the plug about an 1/8 of an inch away from any metal on the motor and ensure your getting spark. also check to ensure your fuel is not bad..

Aug 14, 2011 | Wolf Manufacturing Electrical Supplies

1 Answer

Wolf 800 generator. Engine will run but very electrical power is

is the engine running at the correct speed
3000 rpm to produce 50hz
3600 rpm to produce 60hz

Mar 06, 2010 | Electrical Supplies

1 Answer

No spark at plug

I have a coleman pm 2200 about 12 yrs. old. No spark

Aug 13, 2009 | Wolf Manufacturing Electrical Supplies

Not finding what you are looking for?
Electrical Supplies Logo

Related Topics:

462 people viewed this question

Ask a Question

Usually answered in minutes!

Top Electrical Supplies Experts


Level 3 Expert

3287 Answers

Gene Haynes

Level 3 Expert

5089 Answers

Brad Brown

Level 3 Expert

15633 Answers

Are you an Electrical Supply Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides